Spring is a time of renewal, growth and planting. While many gardeners focus on traditional crops, there is a growing community of cannabis enthusiasts who are also embracing the opportunity to cultivate their own cannabis plants.
Research from New Frontier Data reveals that approximately 3 million people worldwide grow their own cannabis at home, resulting in a staggering yield of approximately 11 million pounds of smokeable flower each year. This number is projected to reach 15 million pounds annually by 2030. Amidst all the excitement around planting and growing, it is essential not to overlook the indispensable foundation of all cannabis plants: the seeds.
The Power of Cannabis Seeds
Affordable and versatile, cannabis seeds provide growers with the ability to cultivate specific strains tailored to their health and wellness needs. These seeds are typically the size of a peppercorn, characterized by an ovular shape tapering to a pointed end. While seeds can vary in color and striation, they typically exhibit a brown hue. Unfertilized seeds, on the other hand, appear off-white and are considerably smaller in size.
Economic Impact
These tiny powerhouses enable growers to cultivate customized strains, while also contributing to the economic growth of the global seed market.
The global cannabis seeds industry was valued at $1.3 billion in 2021, according to Allied Market Research. Experts predict that this figure will surge to $6.5 billion by 2031. Notably, North America accounted for more than 80 percent of the global seed market in 2021.
Benefits for Home Growers
According to New Frontier Data, 70 percent of home growers purchase seeds and cultivate cannabis for the sheer enjoyment of the process while 52 percent find it to be a convenient option. In addition to these advantages, numerous research studies highlight the multiple health benefits of growing one’s own crops, including reduced stress levels, decreased anxiety and increased exposure to the outdoors. Some innovative chefs have even begun incorporating cannabis seeds into their culinary creations, further expanding the versatility and appeal of these seeds.
Seed Safety Considerations
Given that cannabis seeds form the foundation of the entire cannabis industry, it is crucial to understand the various options for obtaining them. One increasingly popular method is through online seed banks, such as Rocket Seeds. However, it is important for those new to purchasing seeds online to thoroughly research the legalities surrounding these transactions. Cannabis seeds are subject to legislation similar to other cannabis products such as flower, concentrates and edibles. The legality of purchasing seeds varies depending on the state in which one resides. It is vital to check local legislation before making any decisions. In states where adult use cannabis is legal, buyers only need to be 21 years or older to order seeds online. Conversely, in states where adult or medicinal use is not permitted, purchasing seeds online remains completely illegal.
Purchasing Seeds Online
Selecting a reputable online seed bank is critical. Ensure that the chosen seed bank has positive customer reviews, offers quality customer service and provides germination guarantees. Researching the available strains, payment options and shipping policies is also essential. It is advisable for beginners to start small by purchasing only a few seeds at a time. Prior to planting, conducting thorough research is necessary, as there are numerous variables to consider and a steep learning curve to navigate. Fortunately, abundant resources are available to assist in this journey. For example, we offer valuable advice on getting started. Additionally, individual seed manufacturers, as well as online resources and apps like Seedtracker, provide guidance and support.
Continued Growth
The U.S. legal cannabis market is projected to exceed $31.8 billion in annual sales by the end of 2023, according to leading cannabis research firm Brightfield Group. Furthermore, they anticipate that within five years, the market will surpass $50 billion in annual sales. Amidst this flourishing industry, it is important to recognize that seeds form the backbone of this expansive market.
As the cannabis industry continues to thrive and expand, it is crucial to acknowledge the fundamental role played by seeds. These tiny powerhouses enable growers to cultivate customized strains, while also contributing to the economic growth of the global seed market. By recognizing the benefits of growing one’s own cannabis and taking proper precautions when purchasing seeds, individuals can partake in this exciting and rapidly growing industry while savoring the rewards of their own harvests.
Creating a healthy cannabis growing environment based on the science behind growing top-notch, medical-grade cannabis is essential for producing consistent results, assuming you start with quality genetics. Before speaking about the environment, it is necessary to highlight that quality and consistency has to first start with quality plant material. In this article, we will explore six key factors that make for a healthy cannabis growing environment and how regular testing allows growers to achieve consistency and quality. Keep in mind, optimizing these factors to the cannabis strains and environment they are grown in is a must.
Lighting
Lighting is the most important factor in creating a good cannabis growing environment. Cannabis plants require specific types, wavelength and exposure times to grow and produce high-quality flower. The two main types of light that are essential for cannabis growth are blue and red spectrum light where blue is primarily dedicated to vegetative growing and red for flowering. The exposure time is necessary for non-autoflower cannabis to maintain a vegetative or a flowering plant.
To ensure that the plants are receiving the right type and amount of light, growers can use specialized grow lights that provide both blue and red spectrum light. They can also monitor the intensity and duration of light using light meters and timers. Regular testing of the light spectrum and intensity can help growers fine-tune their lighting setup for optimal plant growth and flower development.
Temperature
Temperature always needs to be considered when creating a strong, healthy cannabis growing environment. Cannabis plants prefer a warm, humid environment, but temperatures that are too high or too low can negatively affect plant growth and flower development. The ideal temperature range for cannabis growth is between 70-85°F (21-29°C) during the day and between 58-70°F (14-21°C) at night.
To maintain a consistent temperature in the growing environment, growers can use temperature-controlled grow rooms or HVAC systems. They can also monitor the temperature using digital thermometers and adjust the temperature as needed. Regular testing of the temperature can help growers identify and address any temperature fluctuations that may affect plant growth and flower development.
Humidity
Like other factors that require precision, humidity needs to be carefully dialed in when creating an optimal cannabis growing environment. Cannabis plants prefer a humid environment, but too much humidity can promote the growth of mold and mildew. On the other hand, low humidity can cause the plants to dry out and become stressed.
A humidity sensor mounted in a weatherproof enclosure
To maintain a consistent humidity level, growers can use humidifiers and dehumidifiers in the growing environment. They can also monitor the humidity level using a hygrometer and adjust the humidity as needed. Regular testing of the humidity level can help growers identify and address any issues that may affect plant growth and flower development.
Airflow and Ventilation
Proper ventilation helps regulate temperature and humidity and prevents the buildup of carbon dioxide, which can be harmful to the plants. It also helps prevent the growth of mold and mildew. To ensure proper airflow and ventilation, growers can use fans and air ducts in the growing environment. They can also use carbon filters to remove odors and other contaminants from the air. Regular testing of the air quality can help growers identify and address any issues that may affect plant growth and flower development.
Nutrients
Nutrients are a non-negotiable for cannabis growth and flower development. Cannabis plants require a balanced supply of macronutrients such as nitrogen, phosphorus and potassium, as well as micronutrients such as calcium, magnesium and iron.
To ensure that the plants receive the right amount of nutrients, growers can use nutrient-rich soils or hydroponic systems. They can also supplement with fertilizers and other nutrients. Regular testing of the nutrient levels in the soil or growing medium can help growers adjust their nutrient regimen for optimal plant growth and flower development.
Pest and Disease Management
Cannabis plants are susceptible to over 90+ pests and diseases, including insects, mold, mildew, viruses and viroids commonly infected through the environment by touch, air, water and nutrients. The most common are spider mites, aphids, powdery mildew, botrytis, fusarium and hop latent viroid. It is estimated by the United Nations that 20% to 40% of total global crop loss is due to improper pest and disease management. The cannabis growing environment is no different.
Damage from whiteflies, thrips and powdery mildew could be prevented with an appropriate IPM
While lighting, humidity, air flow and nutrients are key aspects for a cannabis growth environment, the most common overlooked aspect of growing is proper pest and disease management. Cannabis plants are susceptible to a variety of pests and diseases, which can have a significant impact on plant health and crop yields. To take optimizing a cannabis growing environment one step further, here are five essentials for developing an effective pest and disease management setup.
Prevention
Prevention is the first and most important step in pest and disease management. Growers should always take steps to prevent pests and diseases from entering or infesting the growing environment in the first place. This can be done by quarantining new plants or clones, using clean equipment, sterilizing the growing area, and monitoring plants for signs of pests and diseases through both visual inspection as well as testing.
Some diseases such as those caused by viruses and viroids, require molecular based testing to identify. Growers should quarantine and test any new plants or clones before introducing them to the growing area. This can help prevent the spread of pests and diseases from infected plants to healthy ones. Growers can also use biological controls, such as beneficial insects, to help prevent pests from infesting the plants. These insects can help control pest populations by preying on them or interfering with their reproduction.
Early Detection
Early detection is key to preventing an entire crop from being infected and scrapped. Growers need to regularly inspect their plants for signs of pests and diseases, including yellowing leaves, discoloration, spots and unusual growth patterns. Early detection can help prevent the spread of pests and diseases and limit the damage they cause, not to mention saving a business’s bottom line!
Integrated Pest Management
Integrated Pest Management (IPM) is an approach to pest and disease management that involves a combination of preventative measures, biological controls and chemical treatments. IPM aims to reduce the use of chemical pesticides, which can be harmful to the environment and human health.
IPM involves regular monitoring of plants for signs of pests and diseases, using biological controls to prevent and control infestations, and only using chemical treatments as a last resort. Chemical treatments should be used sparingly and only when necessary, and growers should follow all safety precautions when using them.
Sanitation
Taking the necessary precautions to ensure all equipment used throughout a cultivation is properly sterilized will save growers from countless headaches. Growers should keep the growing area clean and free of debris, which can provide a breeding ground for pests and diseases. They should also regularly sterilize equipment and growing containers to prevent the spread of pathogens.
Record Keeping
Record keeping is essential for effective pest and disease management in the growing environment. Keep detailed records of all pest and disease issues, including the type of pest or disease, the severity of the infestation, and the treatments used. Cultivators, you will thank yourselves later! This will help identify recurring issues and develop effective pest and disease management strategies.
While there are key aspects of creating a healthy cannabis growing environment, the most common overlooked aspect of growing is on proper pest and disease management, which involves prevention, early detection, integrated pest management, sanitation, quarantine, and record keeping. By taking these steps, growers can help ensure the health and vitality of their plants, produce high-quality cannabis that consumers want and preserve their business’s bottom lines.
With climate and cultivation methods explored, today, we cover the third leg in the primary stool, genetics. Some would say good genetics is all that you need and anyone can be successful with good genetics. We all know that this is not experience talking. Things can go wrong, even with great genetics. Here are some inputs how to pick great genetics so you have them on your side.
Hybrids & Strains
Seeds, the beginning of genetic performance
Everything successful cultivators grow is aligned to their consumer audience. This is hard to predict as the desires in your market will migrate over time as one variety will be highly popular and poof, it’s not, so constant change is necessary. Finding the right flower at the right time is the trick.
The first thing to decide in your pursuit of the ideal phenotype (or pheno-hunt) are your target customers. Assuming you’ve made the choice to go “top-shelf” for aeroponic or hydroponic flower, your variety selection comes down to filial breeder seeds or stable strains from suppliers you know.
Filial hybrids are developed by professional breeders. Two distinct inbred strains are repetitively crossed until their traits are highly consistent. At this point, these carefully inbred lines are crossed to selectively mix the two well defined sets of traits. Filial hybrids are stable and you can usually rely on the robust nature of these seeds.
Strains, on the other hand, are the cross of two strains but they may not be inbred stable filial strains. Sometimes this results in something amazing, but just as randomly, the traits can morph into something disappointing.
Our advice here is to pay the premium and start with high quality reliable stock.
Uniformity
Consistency? Will you grow one variety or multiple varieties per room and per harvest; will they grow well together? Do they grow and test out in a consistent manner (plant size, color, bud size & yield, tested terpene profiles, aroma, disease resistance or tolerance). Are you growing for top shelf flower or bulk extraction? I will focus this discussion on top shelf flower. Premium seeds from professional filial hybrids are not a guarantee, but they are designed to be stable and consistent in their growth and results targeting high performance.
High cannabinoids: 420Kingdom Grapes & Cream
Here, experience counts and reliable seed vendors tend to be well established with filial lines that are worth the investment. Once you acquire your genetics, how to leverage that investment?
Killer Genetics
What traits does your consumer want? Initial searches usually target THC or CBD levels and they evolve to special terpene profiles or pleasing aromas. Flower or bud shape, color, size, density, and stickiness are also traits that can differentiate your genetics. As a producer, you also want to target yield including tall or stretching genetics, or short and fast flowering, germination rates (sometimes they don’t) and percentage of likely hermaphroditing (seldom zero). The qualitative aspects (smoking characteristics) of your production flower that deliver a unique customer experience, both real and imagined, wrap up your brand experience.
So, as you can guess, one size does not fit all types of consumers. Very high yielders that are immediately targeted for extraction offer very different values than perhaps a smaller yielding very potent top shelf smokeable bud. It is a good strategy to plan for a handful of strains that you can bring to market so you have something that will hit the sweet-spot when you deliver your harvests.
Seeds
Seeds with documented guarantees from reliable sources eliminate the characteristic risk, and with the right testing reports, they guarantee no pathogens as well.
The challenge of seeds can be genetic variation, as discussed above, depending on the stability of the commercial breeder. This potential variance can lead to surprises and disappointment. Starting from seed also takes more time to germinate the seeds, exterminate the males, grow mother plants, take cuttings, and start the cycle. This can add 12-16 weeks to your go-green targets for your flower rooms. Be sure to integrate this cycle time planning into your production cycle.
Clones
Insourced clones are the fastest way to go green and move through veg to produce flowering plants and bud harvest. Clones are created by taking a branch cutting from a “mother” plant and typically “rooting” that cutting using an aeroponic cloning system. This clone process can take a few days or weeks depending on the grow environment and aeroponics process. A rooted clone maintains the genetic characteristics and phenotype of the mother plant.
The typical way smaller grow shops get started is through buying clones that are made from these rooted branch cuttings. The combination of mother plants, clones, and sometimes “veg” plants are gathered together in a “nursery”. Nurseries need to be stable for long periods of time to produce the veg growth necessary for cuttings. This time delay makes it harder for the nursery provider to keep the area sterile, without disease, and without pests. If the mothers carry a disease, they are likely to transfer that biologic over to the cuttings. If the media that the clones are grown in picks up root gnats, they will travel with the clones into your facility. The short answer is source your clones from professionally run operations. This trust is worth every penny.
Blue Dream clone array: AEssenseGrows
Insourcing clones allows you to avoid the cost and complexity of running a “nursery”, but this also moves the pest management and quality of mother stock and clones outside of your control zone. In other words, you depend on the clone supplier for both healthy plants AND availability. No clone available from your supplier means no flower in your grow rooms. Your production revenue depends on the reliability of your clone supplier in many ways.
In some grow operations, the nursery is extended to cover the vegetative growth stage of cannabis plants or “veg.” In other approaches, a flower room is occupied for an additional week or two for veg growth. We at AEssenseGrows are strong advocates of running all cloning and vegging activity in a vertical aeroponic nursery in parallel to your flower rooms
Mothers, clone, and veg stages all grow with a vegetative growth light schedule (18 hours on, 6 hours off). The typical process is to take a cutting from a mother plant, place that in an aeroponic “cloner” for 10-12 days until a healthy set of roots is formed for the cutting. That clone is then typically pinched off at the top of the plant at which point the veg stage can begin. Light intensity is gradually increased and the plants are typically vegged for an additional 2 weeks, at this point, you have a bushy veg plant that is ready for a 12/12 light cycle and flowering.
In aeroponics, all of this is done in nursery space. If you choose to use soil or grow media approaches, a series of increasingly larger buckets or rockwool cubes are needed to manage the veg stage and the transition to flower. This can be done in a dedicated veg room or for the first week or two in the flower rooms
Tissue Culture
Healthy Agent Orange mothers: Onyx
Another method for creating your young plants is tissue culture. This is the method of harvesting genetic material from an existing plant with desired characteristics. These genetic samples can be contamination free and even supplied by a genetic bank. A portion of these tissues are cultured in a gel grow tray and the plant will develop roots with a stalk that reaches upward for light energy.
These plant starts are hardened in a similar method to cloning and typically, these starts are grown into mothers that supply your cuttings for the clone cycle. This is an advanced method, so plan for research and development with expected delays to the front end of your sourcing cycle if you choose this path.
Strain Examples
Selecting the best genetics for your market is an art form. Many choices abound. High yielding dense classic strains are Blue Dream, Skittles, Sour Diesel and Girl Scout Cookies. Each of these deliver a typical 18%-24% THC content from fast growing, medium height high plants that yield dense buds. Very potent THC genetics that are popular currently are various “OG” genetics, Bruce Banner, various “Cake” genetics and Kush options. Variants of these run from 25% to 35% THC content.
This Chapter’s Hero Award
Every customer produces great results for their markets but we are very impressed by the genetic selections by 420Kingdom in the central valley of California. Jeffrey Thorn is the owner there and continues to impress with a range of high potency genetics that demand premium prices and sell out regularly in their highly competitive market.
With good genetics for your consumers, you are positioned to be successful. Advanced cultivation methods like aeroponics and hydroponics can give you a lift and the right environment and nutrition helps you tie this all together. Our next and last chapter will cover consistency and repeatability through Standard Operating Procedures (SOPs).
Aeroponic & hydroponic systems can operate with little to no soil or media. This eliminates the pest vectors that coco-coir, peat moss/perlite and organic media can harbor as part of their healthy biome approach. Liquid nutrient systems come at the nutrient approach from a different direction. Pure nutrient salts (nitrogen, potassium, magnesium and trace metals) are provided to the plant roots in a liquid carrier form. This sounds ideal for integrated pest management programs, but cultivators have to be aware of water and airborne pathogens that can disrupt operations. I will summarize some aspects to consider in today’s summary.
The elimination of soil media intrinsically helps a pest management program as it reduces the labor required to maintain a grow and the number of times the grow room doors are opened. Join that with effective automation with sensors and software, and you have immediate improvements in pest access. Sounds perfect, but we still have staff to maintain a facility and people become the number one source of contamination in a grow operation.
Figure 1: Example of Pythium Infected & Healthy Roots
Insects do damage directly to plants as they grow and procreate in a grow room. They also carry other pathogens that infect your plants. For example, root aphids, a very common problem, are a known carrier of the root pathogen, Pythium.
Procedures
One of the most common ways for pests to access your sealed, sterile, perfectly managed facilities are in the root stock of outsourced clones. If you must start your grow cycles with externally sourced clones, it is strongly recommended that you quarantine those clones to make sure that they do not import pest production facilities into your operation. Your operation management procedures must be complete. If you take cuttings from an internal nursery of mother plants, any pathogens present in your mother room will migrate through cuttings into your clones, supply lines, and subsequently, flower rooms.
Start your gating process with questioning your employees and visitors. Do they grow at home or have they been to another grow operation in the last week? In the last day? You may be surprised by how many people that gain access to your grow will answer these questions in the affirmative.
Developing standard operating procedures (SOPs) that are followed by every employee and every visitor will significantly reduce your pest access and infection rates, and hence, increase your healthy harvests and increase your profitability. Procedures should include clothing, quarantining new genetics and cleaning procedures, such as baking or irradiating rooms to guarantee you begin with a sterile facility. This is covered more in the complete white paper.
Engineering Controls
Figure 3: Access Control: Air Shower, FarmaGrowers
Technology is a wonderful thing but no replacement for regimented procedures. Considered a best practice, professional air showers, that bar access to internal facilities, provide an aggressive barrier for physical pests. These high velocity fan systems and exhaust methods blow off insects, pollen and debris before they proceed into your facility. From that access port into your grow space, positive air flow pressure should increase from the grow rooms, to the hallways, to the outside of your grow spaces. This positive airflow will always be pushing insects and airborne material out of your grow space and away from your plants.
Maintaining Oxidation Reduction Potential (ORP)
ORP is a relative measurement of water health. Perfect water is clear of all material, both inert and with life. Reverse osmosis (RO) is a standard way to clear water but it is not sufficient in removing microscopic biological organisms. UV and chemical methods are needed in addition to RO to clear water completely.
ORP is an electronic measurement in millivolts (mV) that represents the ability of a chemical substance to oxidize another substance. ORP meters are a developing area and when using a meter, it is important to track the change in ORP values rather than the absolute number. This is due to various methods that the different meters use to calculate the ORP values. More on this in the white paper.
Oxidizers
Figure 4: AEssenseGrows Aeroponic Nozzles
There are two significant ways to adjust the ORP of a fertilizer/irrigation (fertigation) solution. The first is by adding oxidizers. Examples are chemical oxidizers like hydrogen peroxide (H2O2), hypochlorous acid (HOCl), ozone (O3) and chlorine dioxide (ClO2). Adding these to a fertigation solution increases the ORP of the fertigation solution by oxidizing materials and organic matter. The key is to kill off the bad things and not affect the growth of plants. Again here, the absolute ORP metric is not the deciding factor in the health of a solution and the methods by which each chemical reaction occurs for each of these chemicals are different. This is compounded by the fact that different ORP meters will show different readings for the same solution.
Another wonderful thing about automation and aeroponic and hydroponic dosing systems is that they can automatically maintain oxidizing rates and our white papers explain the methods executed by today’s automation systems.
Water Chilling
Another way to adjust ORP is to reduce the water temperature of the reservoirs. Maintaining water temperature below the overall temperature of your grow rooms is imperative for minimal biological deposition and nutrient system health. Water chillers use a heat exchanger process to export heat from liquid nutrient dosing reservoirs and maintain desired temperatures.
The benefit of managing ORP in aeroponic and hydroponic grow systems is highly accelerated growth. This is enhanced in aeroponics due to the effectively infinite oxygen exchanging gases at the surface of the plant roots. Nutrient droplets are sprayed or vaporized in parallel and provided to these root surfaces. Maximizing the timing and the best mineral nutrients to the root combustion is the art of grow recipe development. Great recipes drive superior yields and when combined with superior genetics and solid environmental controls, these plants will deliver spectacular profits to a grow operation.
Another Hero Award
Before closing this chapter, we have many cultivators that are producing stellar results with their operational and IPM procedures, so it is hard to choose just one leader. That said, our hats are off to RAIR Systems again and their director of cultivation, Ashley Hubbard. She and her team are determined to be successful and drive pests out of their operations with positive “little critters” and the best water treatment and management that we have seen. You are welcome to view the 7-episode walkthrough of the RAIR facility and their procedures here.
Cannabis cultivators across the U.S. are confronting plummeting wholesale prices and tighter profit margins. Operators in Pennsylvania say flower prices have fallen from around $4,000 a pound to around $3,000, on average, and prices in the more mature markets of California, Oregon and Colorado have experienced extreme volatility. Prices in those states are averaging around $700 per pound but of course, that’s an average. There are whispers that prices are as low as $150, revealing how bad the situation really is.
Oversaturation of legal cannabis affects commercial growers everywhere. For example, when Oklahoma opened its free-wheeling medical cannabis program with unlimited business licenses, the pipeline of cannabis from legacy markets in California was disrupted and a glut of flower from the gray market began to influence pricing within the state’s legal market. Although cannabis is not federally legal and interstate commerce is banned, what happens in one state definitely affects what happens in another.
Competition in legal markets has also increased dramatically in recent years as multistate operators expand their footprint and consolidation proliferates. Vertically integrated cultivation, manufacturing and retail is becoming unsustainable for many mom-and-pop businesses, while MSOs can leverage their cash and resources to weather the current storm.
Economic Viability Meets High Quality Production
All of this news is not necessarily negative, but it’s a definite cautionary tale: Being complacent opens opportunities for others. Growing cannabis is complex. It is working with a living and breathing machine. Some businesses fail because operators are not able to find the perfect blend of horticulture, plant science and manufacturing efficiency necessary for success. Some see it simply as a manufacturing concern, others a scientific endeavor, and still others as an artform. An understanding of growing cannabis as a blend of all three is paramount.
Just like the LED evolution, other new cultivation technology is here to stay and should not be brushed off as just experimental
Squeezing more high-quality product out of existing facilities is essential. Costs for labor and electricity are relatively fixed, so operators must turn to technology to improve yield, quality, consistency and plant health without increasing operating expenses.
Over the years, growers have often resisted change surrounding what they view as “the way” or “the best,” but with the industry in such distress, the time is now to address facility inefficiencies.
Much like the evolution of LED use, there might be an initial skepticism at the cost and real value of new cultivation technology, but the economics are too compelling to ignore. The majority of all indoor grows now use LED. The progression from single-ended bulbs, to double-ended HPS, to LED is analogous to plants on the floor of a grow facility, to rolltop benches, and now to vertical farming using racks.
Vertical Cultivation Science
Crop steering applies plant science directly to commercial production. The methodology is based on the idea that plants can be manipulated to grow and perform a certain way. For cannabis plants, the science really comes into play with inter-canopy airflow.
When airflow occurs under the surface of the leaf of the plant, the stomata opens and gas exchange increases as water vapor and oxygen are released and carbon dioxide is absorbed. The micro-barrier of air trapped against the leaves is broken and the exchange of gasses and energy in the cultivation environment is improved, enabling the entire grow to increase its yield. And while CO2 supplementation is widely used and has been for years with positive effect, the under-canopy airflow provides greater efficiency relative to the operating expense of pumping CO2 into the grow room. Money can be saved by applying science to encourage the plant to uptake the extra CO2 that has been naturally released.
Proper Drainage Is Also Key
Controlling the space with proper drainage will keep a host of problems at bay
Drainage issues like the puddling of water in vertical farming are detrimental to the efficiency of a cultivation facility. Even when growers use precision irrigation techniques to give the plants pinpointed irrigation volumes over different time periods, rack systems can still suffer from drainage issues. That means that affected plants are not receiving the precision irrigation strategy and the entire purpose of the scientific application is defeated.
Precise drainage is critical because standing water opens the door to root born disease, pests, and microbial issues. Spray regimes can address this problem, but they cost money. The key is to reduce dependency on mitigation efforts by better controlling the agricultural space and improving outcomes with a scientifically approached plan.
Greenhouses, warehouses and vertical farming facilities all have potential environmental issues that reduce their economic viability, but with proper vertical air movement, drainage equipment and an understanding of microclimates and how to address them scientifically, efficiency and product quality are enhanced.
Time to Embrace Change
As with any industry, there is resistance to adopting new technology in cannabis cultivation. The original and legacy players will always claim they know how to best grow their plants, but the reality is that the business needs must be addressed.
As canopies increase within a facility, advancements like robotics, LEDs and advanced airflow technology define how the industry operates and continues to improve. Efficiency keeps business alive—cannabis growers must continually assess their operations and make the capital investments that will pay off as wholesale prices continue to decline.
Aeroponic & hydroponic systems grow plants at a highly accelerated rate. A “clean room” type of construction approach is the best way to manage this type of grow operation. Starting with a facility that is completely void of any kind of wood or materials that are porous is a good start. Cellulose materials collect moisture and encourage mold and mildew formation no matter how good the sealant.
We have seen cultivation spaces built out of dry wall over wooden post construction and studs that look sealed and solid on the outside of walls but when repaired for plumbing or other expansion work, they are black inside and covered with nasty mold that no one wants near their grow space.
Panel construction over steel frames or steel studs with skins is a safer, more sterile approach than retrofitting a wooden structure. Panel construction offers the added benefit of rapid assembly and minimal labor costs. We have seen 300 light rooms assembled in a few days so it is both very cost effective and safely sealed for protected growth.
Room Sizes & Count
How do you best fill this space if you have a clean slate?
If you have unlimited space, temperature and humidity management should determine the room sizes in your facility. Room sizes that are square in dimensions tend to be easier to maintain from an environmental standpoint. Long narrow rooms are good for fan airflow but tend to be more expensive from a cooling and dehumidification point of view. The larger the room, the more likely that you will get “microclimates” within the room which can challenge yield optimization.
Now, of course, many grows are retrofits of existing structures so compromises can be necessary. We have found that cultivators that have both very large and mid-size rooms in the same facility (200 lights versus 70 lights) are consistently more successful in the 70 light rooms. These “smaller rooms (~1,500 ft2) out-yielded and out-performed the larger rooms using the same genetics and grow plans. Compartmentalization also minimizes the risk in the case that a calamity (i.e. pest infestation) strikes the room. In a large room scenario, the losses can damage your operation. For this reason, we recommend 70-100 light/tub rooms as a standard.
Rooms should also follow your nursery economics. Structuring your nursery to produce just enough clones/veg plants for your next flower room avoids wasted plant material and resources. Breaking a larger space down into individual rooms means that you need fewer veg plants to fill your flower room that week. The best way to optimize this is to have a number of rooms that are symmetrical with the number 8 (typical 8-week cycle genetics).
With 8 rooms running flower, you are able to plant one room per week for 8 weeks. In the 9th week, you start over on room 1. This continuous harvest process is highly efficient from a labor standpoint and it minimizes the size of your mothers room (cost center). Additional space can be applied to your flower rooms. If you do not have infinite space, even divisors work just as well; 2 or 4 rooms can be planted in sequence for the same optimization (for 2-room structures, harvest and replant 1 room every 4 weeks for example). The optimal structure (8, 16, 24, or more rooms) enables you to optimize your profitability. If any of this needs further explanation, please just ask.
Not photoshopped: An “ideal” 70-tub flower room in a CEA greenhouse (courtesy of FarmaGrowers, South Africa)
Within your room choice, movable rows or columns of tubs/lights also provides optimal yields. Tubs/plants can be moved together for light usage efficiency and one 3-foot aisle can be opened for plant maintenance. Racking systems or movable trays/tubs make this convenient nowadays.
Floors
Concrete floors offer pockets for bacteria to collect and smolder. As such, they have to be sealed. Proper application of your sealant choice is required so that it does not peal up or crack after sealing. There are many benefits to sealed floors that is discussed in the white paper. Floor drains are the equivalent of a portal to Hell for a sterile grow operation. Avoid them at all costs.
Phased Construction
Tuning or optimizing you grow rooms for ideal flowering operation depends on your location. Our advice is that you build and optimize your facility in phases with the expectation that nothing is perfect and you will learn improvements in every phase of expansion. The immediate benefit is production that you can promote to your sales channels and revenue that starts as soon as possible to improve your profitability. This is also an excellent learning curve to apply to subsequent rooms. Our happiest customers are those that learned construction improvements in early rooms that were able to be applied to following rooms without headache. The ability to focus on one or two rooms also allows you to get the recipe correct rather than just relying on “winging it”.
Don’t Be In A Rush To Go Green
A 70-tub flower room (courtesy of FarmaGrowers, South Africa)
Validate your water supplies and their stability. Verify that the water in your aeroponic or hydroponic feeds that get to your plants are clean and sterile. This is much easier in a step-by-step fashion than in a crisis debug mode once production is in progress. Be very cautious about incoming clone supplies. We will talk about this more in the next chapter on Integrated Pest Management but incoming clones are a top pest vector that can contaminate your entire facility.
Warehouse Versus Greenhouse Cultivation Spaces
As we started out, controlling your environment is your most important concern. We have seen success in both indoor rooms and greenhouses. The defining success factor is controlling humidity and temperature. Modern sealed controlled environment (CEA) greenhouses do this well and CEA is somewhat of a given for indoor grows. More details on this in the white paper.
Packaging these recommendations gets you to the perfect body for your Formula 1 race car. Now, you are ready to look at some of the mechanics of protecting your operation from pesky little critters and biologicals that can derail your operation and weaken your engine.
Before we sign off this week, I wanted to highlight the ultimate build-out that we have seen so far. Of course, there are many challengers that have done this well but at this point, FarmaGrowers in South Africa has the best thought out facility we have seen. They acquired Good Manufacturing Practice (GMP) & Good Agricultural & Collection Practice (GACP) certification early in their operations due to very well-thought-out designs. They are exporting to global markets without irradiation today. Certainly, many successful customers have beautifully thought-out operations and there are several upcoming facilities that offer amazing planning that will challenge for this crown, but for now. FarmaGrowers leads the pack in this aspect. See here for a walkthrough.
For commercial cannabis growers, consistent crop yields are vital to maintaining product profitability, as well as durable profitability. Since cannabis thrives under certain conditions, the more control a cultivator has over those conditions, the easier consistent harvests become.
While factors like humidity, light exposure and water may be easy enough to control in any indoor environment, other influential factors can be more difficult to control, such as mold or other contaminants. Growing in a controlled cleanroom environment ensures healthy, high-quality cannabis by mitigating some harder-to-control threats. For these reasons, growing cannabis in a cleanroom environment is rapidly becoming the gold standard in the industry.
A Closer Look at the Cleanroom Environment
A cleanroom facility is a specially designed room or modular addition designed to support a tightly controlled grow environment for crops. The design of the cleanroom relies on several design features to deter issues with pollutants, such as insects, mold, airborne microbes and dust. Even though cleanroom environments are often affiliated with cultivating certain types of crops, these facilities are also valuable in other industries, such as medicine, biology and pharmaceuticals.
Cleanrooms can be conservatively sized or massive. They can be configured to accommodate different processes, and they can be built to suit a specific grower’s preferences. However, several features are key, such as:
Preventing contamination can save a business from extremely costly recalls.
One fundamental requirement of a cleanroom is to control the introduction of contaminants into the space. Contaminants can be carried in on the people who visit the space. Therefore, cleanroom implementation must come along with strict protocols when it comes to employee entry into the room. For example, air showers, special gowns, masks and other measures may be required.
The Benefits of Cleanroom Environments for Cultivators
On the surface level, cleanrooms make it possible to achieve a well-controlled environment for cannabis cultivation. However, while this is undeniably important in terms of consistent crop yields and profitability, cleanrooms pose a number of broader advantages for cultivators and end customers.
Meet Laboratory Testing Guidelines and Protocols
For now, states create product testing regulations for cannabis. Most states that have legalized medical or adult use cannabis have created protocols for lab-testing products for pesticides and microbes. When batches of cannabis product do not meet state lab-testing standards, the product can be recalled or destroyed. In 2016, Steep Hill published an alarming study that showed they detected pesticides in roughly 70% of the samples they received and up to one third of all samples would have failed to meet regulatory standards. Cleanrooms reduce a grower’s reliance on pesticides.
Negate the Risk of Fungal Contamination
Cleanrooms negate the risk of fungal contamination through proper ventilation, particulate control and positive pressure.
Cannabis is prone to certain types of fungal spores that can cause severe illness in end customers. For example, Aspergillus moldspores are common in cannabis and can lead to cases of chronic pulmonary aspergillosis. In large doses, Aspergillus mold spores may even cause liver failure due to the carcinogenic mycotoxins the spores produce in the body. Cleanrooms negate the risk of fungal contamination through proper ventilation, particulate control and positive pressure.
Create a Safer Work Environment for Employees
Employees who work in cultivation facilities in the cannabis industry face various occupational hazards. Many of these hazards are related to being in contact with fungicides, mold spores and chemical fertilizers. The exposure can result in issues such as allergic reactions, respiratory irritation and other physical threats. Cleanrooms and how they function can deter many of these risks. For example, the lack of need for fungicide use automatically lowers the risks due to lacking exposure. Further, because protective gear is required to maintain the integrity of the cleanroom, there is less of a chance an employee’s skin or respiratory system is exposed to irritants.
Cleanrooms: The Potential Future of Cannabis Cultivation
As cannabis becomes a more robust industry and regulations become more clearly defined, growing standards are bound to change. As speculations of national regulations veer closer to reality, growing cannabis industrially may even mean required cultivation facility upgrades. Cleanroom environments give growers firm control over the health of their crops while ensuring clean products for customers. Therefore, these innovative and health-forward implementations could easily become the norm in the cannabis industry in the future.
Having a well-built grow room with adequate lighting, the ability to properly control the environment, proper nutrient feedings, a good pest management plan, well trained employees and an experienced cultivation manager are very important to the overall output of cannabis plants. However, even if you have all those measures in place, there’s no guarantee of success. One factor that is often overlooked is how many harvests you can get per year, as clearly the more harvests you can get in a given time period, the more likely your chances of success are in this competitive industry. This is why having a good cultivation plan in place, with proper foresight and planning, is so essential to success.
Increasing yield or production output in a cannabis cultivation facility can often be as simple as having the right cultivation plan in place to ensure that you are harvesting the maximum number of times per year. All it requires is a well thought out plan, and best of all, that does not cost any money if you have someone with enough cultivation experience assisting you and will earn back more than the cost of paying a consultant to get such a plan in place.
In this article I will explain why changing nutrients, grow media or even a cultivation manager may not necessarily increase yield, quality or your chance of success. What you should be focusing on is your cultivation plan and the scheduling of your cultivation cycles.
Why changing nutrient companies may not necessarily increase your yield
Nutrient dosers are used to inject fertilizer directly into irrigation lines
For the most part, nutrient companies use the same ingredients in their product lines and often buy them from the same source, but they combine them in different forms and ratios to create their “unique” product. You can go to a grow store, pick five different nutrient products, read the labels and compare the different nutrients in each one. You will find for the most part that they are very similar. Generally speaking, you could pick any one of those five nutrient companies and have great results. Mixing nutrients into a nutrient tank needs to be done precisely and if your employees are not doing it properly this can lead to plant health issues. In larger cultivation facilities, often nutrient dosers are used to inject fertilizer into the irrigation lines without having to mix nutrients. However, if the dosers are not set to the proper ratios, this can also lead to plant health issues.
There are a few companies that I really like that have a different approach to plant nutrition, which saves time and can prevent human error associated with mixing and applying liquid nutrients. Soilscape solutions, Organics Alive and Beanstock Agriculture all have nutrient lines that are intended to be used with soil or soilless media that can be amended into the soil which provide a slow steady release of nutrients that the plants can uptake as needed. This avoids the risk of human error in repeatedly applying liquid nutrients to the plants.
Why changing grow medium and nutrients will not necessarily improve your yield but may increase yourquality
Whether it is rock wool, coco fiber, a soilless mix or living soil, everything has a limit. Giving your plants the proper amount of water and the frequency at which you water, along with having sufficient room for the roots to grow are key factors to ensuring plant health. If your plants aren’t getting watered properly, no matter what media you are growing in, you will be having problems. Changing things like grow media won’t result in instant success, as there will always be a learning curve when making changes to your cultivation. If you cannot adapt quickly enough, you can quickly create major problems.
Changing things like grow media won’t result in instant success, as there will always be a learning curve when making changes to your cultivation.
You would be better off to master the grow media you are currently working; you will have more chance of success making slight alterations to your current media than you will if you switch your grow media altogether. There are so many different nutrient lines, soil companies, coco coir companies and the truth is any of them can lead to success.
Changing grow media and nutrients do play a large role in quality though. With cannabis being legalized in many states, the overall quality of cultivation inputs have increased, especially nutrients. However, in general, with some exceptions, the quality of cannabis has not necessarily increased along with the increase in quality of nutrients. One exception: I would argue that switching from salt nutrients and rock wool, to organic living soil will result in an improvement to the flavor, quality and terpenes of the cannabis.
A lot of people use rock wool with salts because it’s easier to scale up than if you are growing in soil, but some quality is also sacrificed. Soil is heavy and messy and most people throw their soil away which takes a lot of money and labor to do. Reusing your soil is one of the best ways to save time, money and increase quality. I had a friend that grew the same variety, same lights, same ventilation but grew hydroponically with salt-based nutrients and he would always say the cannabis I grew, organically, tasted better. The same was true when we grew the same variety outdoors. He used salt-based fertilizer, I used amended soil with water. There wasn’t really a comparison in flavor and the yield was not compromised either! This was his opinion not mine.
I think the vast majority of consumers have not seen the type of quality that someone in Northern California who has been smoking and growing for 20 plus years has seen. Quality is relative to what you have been able to acquire. Most people especially nowadays will never see the quality that used to be common when we didn’t treat the sacred herb like a commodity. When you do it for the love of the plant it shows. Remember, quality is relative to your experience and if salty weed is all you know, you are probably missing out.
Why changing your Cultivation manager may not necessarily increase your yield
Every cultivation facility should have an experienced cultivation manager who is knowledgeable in the areas of nutrient requirements, pest management, environmental requirements, managing employees and overall facilities operations. If a grow room cannot sustain the proper environmental set points, blaming the problems and issues that arise on the cultivation manager is not fair. It is a common problem in the cannabis industry – the owners of a company are not seeing the results that they want and think that by replacing the cultivation manager it will solve all their problems. In reality, often the problem results from upper management or owners of the company not providing the cultivation manager the tools necessary to perform their job at the highest level. Another common problem is when owners fire the cultivation manager and replace them with lower-level employees to manage the facility. The problem with this is those employees do not have enough experience nor the attention to detail to successfully run a cultivation facility. The result is that yield and quality suffer tremendously.
You should be harvesting every 60-70 days
If you are cultivating strains that finish flowering in 60 to 70 days you should be getting five harvests per year.
The reality is there is no one specific thing you can try or buy that will result in success. It is everything combined, the HVAC system, lights, genetics being grown, water quality, air quality, root zone temperature, ability to control environment, having a clean facility, disease free plants, knowledgeable cultivation manager etc. that are required to operate a successful cultivation.
But all of that is less important to yield than a good cultivation plan. Cultivation methods directly tie into the overall production of a facility. But, regardless of whether you’re growing in soil, hydroponics, using LED or HPS, have low or high plant counts, if you don’t have the ability to harvest a grow room, clean and replant within a very short amount of time (ideally one or two days) then you’re going to be losing out on profit.
If you’re cultivating strains that finish flowering in under 60 days you should be getting six harvests per year. If you are cultivating strains that finish flowering in 60 to 70 days you should be getting five harvests per year. To do this, you will need to have the appropriate amount of plants that are ready to be flowered to refill your grow room or greenhouse ready to flower. With a little bit of planning and foresight you will be able to do this, and you will be on your way to producing your highest yield potential.
If you are struggling to have enough plants that are ready to flower once you are done harvesting and cleaning your grow room, having trouble planning your cultivation schedule to maximize production, or struggling to maintain a mother and clone room to supply your own plants or planning for the appropriate amount of labor, contact Floresco Consulting and talk with one of our cultivation advisors to get you back on track. We can guide you to ensure you are harvesting, cleaning and replanting every 60 days. Contact us today to get your facility producing at its maximum potential.
In the cannabis industry, it’s crucial to be able to predict the future, to adapt and survive in a competitive industry that is arguably regulated more closely than any other.
From licensing to buildout, there are a growing number of barriers to entering the cannabis industry as a cultivator. Those who are lucky to successfully establish a grow operation are well aware that one of the crucial hurdles is managing space to maximize facility efficiency and capacity.
To stay profitable, the more plants you can grow and harvest at a time in a continuous cycle, the better. From an economic and environmental perspective, managing cost, space and time comes down to automation and efficiencies. One of the most efficient ways we optimize is through the practice of vertical farming.
Vertical farming maximizes canopy square footage while minimizing Cost of Goods Sold (COGs) to produce high-quality cannabis at scale year-round, and the industry is slowly finding that this method is an incredibly efficient and profitable way to maximize cannabis output.
Yellow Dream Farm is our family-owned cannabis cultivation, manufacturing and distribution company based in San Bernardino County, California, often known as the Silicon Valley of cannabis. Our craft, boutique-style cannabis is grown from floor to ceiling in the 30,000-square-foot facility. We’re using cutting-edge technology that’s only come to market in the last five years and using a variety of sustainable practices. With environmental and feeding efficiencies, we’re able to harvest 300 pounds per week when compared to 150 pounds per week from a facility of the same size.
Vertical Farming for Space Optimization
Like any medical field, cannabis has seen large numbers of outside investments into the space, bringing ideologies and efficiencies from other time-tested industries. One such efficiency is vertical farming – a practice already seen in large-scale agriculture.
The Yellow Dream Farm vertical cultivation facility
We choose vertical farming to maximize our canopy square footage and minimize COGs to produce high-quality cannabis at scale. The barrier to entry into the cannabis industry is expensive, and you must utilize every square inch to stay profitable. We believe vertical farming is the most efficient and most profitable way to maximize output and our numbers can back that up; for example, we can produce double the amount of flower than the average single-tier room with the same square footage, without doubling the cost.
Our rooms contain double stacks to double room capacity by using ceiling heights instead of square footage. Even though vertical farming has larger start-up costs, we can maximize square footage and output, allowing us to get a better and faster ROI. Vertical farming can be done in many different ways but the way we built our facility was always with a sustainable outlook. We also look to improve and remove human error; with full irrigation control and crop steering technologies, we can recalibrate sensors, irrigation media and environmental sensors when needed based on successes, challenges or environmental constraints. Additionally, we have a few other sustainable practices that make a difference.
Water Conservation, Lighting and Automation
Being a California-based grower, water conservation is a key part of our operations. With San Bernardino County being located in the heart of the high desert, conserving water is not only a requirement but a competitive advantage. Our practices provide cost savings which we then pass along to our customers. Each cannabis plant on average requires between a half gallon and one gallon of water per day, which we then recirculate through condensate water from our A/C and dehumidifiers. All runoff nutrient water is re-filtered and reused to get the most out of our nutrients before discarding waste. Our freezer panel walls hold temperatures at consistent rates, and we have a fully automated system to dial in specific needs at any given time.
LED lights above a crop at Yellow Dream Farm
Lighting is another major environmental and capital cost. Our primary lighting system is LED technology, and we use LED spectrums to find which spectrum benefits the plant most. With LEDs, our energy consumption is 30 percent less.
Vertical Farming Is the Future of Cannabis and Agriculture
Vertical farming has been hailed as the future of many agricultural industries and cannabis is no different. We already see large vertical farms in most legal states, but surprisingly it’s still not a common style of growing. As the price per pound steadily declines in California, being able to keep COGs down will allow vertical farmers to sustain and thrive in this volatile industry.
In order to adapt, grow and leave a positive mark on the industry, we must pave the way for new styles of growing and utilizing new technology and science that was not available to growers in the past. We can use these advanced new technologies to make real-time changes to each sector of our facility and optimize both people power, and energy efficiency. And most importantly, we’ll be able to produce top-quality cannabis for adults to enjoy at affordable prices.
By Dr. Markus Roggen, Amanda Assen, Dr. Eric Janusson No Comments
Many people associate cannabis with eco-friendly, counter-cultural movements, but we know the environmental impacts of the cannabis industry are significant. Given the climate crisis, cannabis production companies have a responsibility to ensure future demands of the industry are met in an environmentally sustainable way. We also know that as the world is seeing the impacts of climate change, consumers are changing their spending habits 1. As a result, companies also have the financial incentive to seriously consider implementing more environmental policies, to align their interests with the interests of consumers. Unfortunately, restrictions on cannabis research and the legal industry create barriers to implementing many environmentally friendly alternatives in production. However, this does not give us an excuse to do nothing while we wait – there are many steps that can be taken while we work to overcome these barriers. Our team at Delic Labs aims to help companies ensure the environmental and economic sustainability of the cannabis industry. So, we did some research and developed the Cannabis Better Future (CBF) concept, a guide that considers the impacts of cannabis cultivation and processing on the environment. The pillars of CBF are:
Use of renewable/recyclable materials in production
The packaging used for legal cannabis products is infamously excessive. A standard 3.5-grams of dried cannabis is estimated to come packaged in more than 70 grams of plastic. This seemingly redundant packaging is done to meet regulations surrounding cannabis packaging that often require single-use plastic with labels and warnings at specific sizes 2. Despite this, there is work being done to get biodegradable packaging approved in the industry.
More companies, such as Knot Plastic, are using plant-based materials to provide medical-grade biodegradable alternatives to single-use plastic 3. As members of the industry, we should support these companies and call for regulations to approve biodegradable packaging. As for immediate actions that can be taken, we can turn to companies that reduce the amount of plastic from the industry that ends up in landfills. The Tweed x TerraCycle Cannabis Packaging Recycling Program accepts all cannabis containers from licensed producers in Canada – free of charge – and melts down the plastic to create new products 4. This includes tins, plastic bags, tubes and bottles with child-proof caps. The program has saved more than 165,000 containers from ending up in landfills.
Upcycle biomass waste
It is estimated that for every pound of cannabis harvested, up to 4.5 pounds of plant waste is generated 5. Cannabis biomass waste can be discarded in four different ways: via landfill, composting, in-vessel digestion or incineration 6. Cannabis bio-waste usually ends up in landfills because this is the cheapest method. However, landfill disposal represents a missed opportunity for companies to use biomass waste for economic and environmentally-friendly uses.
Converting biomass for other uses will drastically limit waste
To reduce landfill waste, some companies are looking at sustainable bio-circular solutions, where cannabis biomass is converted into something of industrial use such as compost, bio-plastics and paper packaging for cannabis products 7. The easiest way to reuse cannabis biomass with current regulations in place is to upcycle it to produce compost and greywater that can be used for industrial cultivation 8. Currently, bleach is commonly used to remove THC from biomass, making it unfit to be used for these purposes 6. However, Micron Waste Technologies Inc. have shown enzymatic denaturation can be adopted on the industrial scale to remove THC from the biomass, resulting in reusable water and compostable matter 8. Turning to this alternative method would also reduce the amount of required fertilizer and replace bleach with a more environmentally-friendly solution.
Recycle production side streams
Terpenes are the compounds in cannabis that give it distinctive aromas and flavors sought after by consumers.During the cannabis drying stage, over 30% of terpenes can be lost along with the water phase from the product 9. This terpene-containing water phase gets trapped in drying rooms and decarboxylation ovens and is usually thrown out. To reintroduce the terpenes in their products, companies usually purchase them 10.However, they instead could be recapturing terpenes that are otherwise going to waste, and re-introducing them into their products. Recapturing terpenes would not only reduce the production and shipment energy that goes along with purchased terpenes, but also the costs of buying them.
There are many other wasted by-products that can be recycled. Ethanol that has been used as extraction solvent can be reused as cleaning solvent, reducing the need to purchase ethanol separately for cleaning purposes. Further, the condensation caught in HVACs can be recycled to water plants.
Optimize production energy efficiency
LED lights use less energy and omit less heat than other more traditional options
A study by Summers et al. 11 found that from producing one kilogram of dried cannabis flower, the emitted greenhouse gasses emissions range from 2,283 to 5,184 kg of CO2. Electricity used for indoor cultivation is the major culprit in producing these emissions. In fact, over $6 billion is spent annually to power industrial cannabis growth facilities in the U.S. alone12. Growing outdoors is significantly more energy efficient; however, non-auto flowering, high-THC cannabis plants depend on the specific timing of daylight (and darkness) to grow properly 13. Optimal conditions for these plants are not always achievable in outdoor setting. Meanwhile, auto-flowering plants that are hearty outdoors are generally lower in THC content 14. Promoting research into generating more stabilized cannabis cultivars may help outdoor growing be a more feasible solution. Given the recent work being done with genetically modified and transgenic plants, upregulating THC production in cannabis and increasing the heartiness in different climates is well within the realm of possibility 15–17.
In the meantime, cultivation facilities can do their part to maintain a controlled growth environment with reduced energy waste. Companies that are still using high-intensity sodium lights should consider switching to high-efficiency LED bulbs 12. These are a good alternative option as they produce less heat, and as a result, require less mechanical cooling. It has been shown that many plants, including cannabis, might even do better under blue-red LED lights 18,19. Growth under these conditions correlated with an increase in THC and CBD levels, and overall larger plants 18. In addition to low energy consumption, LED lamps have flexible mobility and a tunable spectrum range. This makes it possible to mediate the spectrum specifically for cannabis crops by controlling each spectral range and manipulating spectral quality and light intensity precisely. Finally, lights can also be brought closer to plants, to further reduce the amount of mechanical cooling needed.
Utilize high-precision processes
Reducing energy use while maintaining production rates can only be done if the process is optimized. Our own research improves process optimization in the cannabis industry. A key component of industrial optimization is reducing wasted time on various machines. For cannabis producers, this machine “junk time” can accumulate when the instrumentation is not progressing the reaction.
Reducing energy use in this case means ensuring machines are not in operation if they are not progressing the reaction. For example, many companies spend approximately two hours on the decarboxylation step because decarboxylation is always complete after two hours 20; however, decarboxylations are often complete in as little as thirty minutes 21. Companies can save energy by installing a monitor on decarboxylation systems to stop reactions once they are complete.
Reducing the environmental impacts of the cannabis industry is crucial to combat the developing climate crisis. While lifting restrictions on cannabis research and mitigating stigmas surrounding the legal industry will be what ultimately paves the way for meaningful changes toward a sustainable industry, cannabis companies cannot wait for regulatory changes to occur before considering eco-friendly practices. As outlined by CBF, there are existing actions which all companies can take to reduce their carbon footprint immediately. Delic Labs, and many other companies we have noted, aim to support companies in making these decisions for a better future for cannabis.
Bauder, P. Ry Russell of Knot Plastic️: 5 Things We Must Do to Inspire the Next Generation about Sustainability and the Environment. (2020).
Waste360 Staff. Tweed, TerraCycle Take Cannabis Packaging Recycling Across Canada. (2019).
Peterson, E. Industry Report: The State of Hemp and Cannabis Waste. CompanyWeek (2019).
Commendatore, C. The Complicated World of Cannabis Waste Generation (Part One). Waste 360 (2019).
Drotleff, L. Cannabis-based packaging and paper could reduce waste, promote sustainability. MJBiz Daily(2020).
Waste 360 staff. Micron Secures U.S. Design Patent for Waste Treatment Tech. Waste 360 (2019).
Challa, S. R. DRYING KINETICS AND THE EFFECTS OF DRYING METHODS ON QUALITY (CBD, TERPENES AND COLOR) OF HEMP (Cannabis sativa L.) BUDS. (2020).
Erickson, B. Cannabis industry gets crafty with terpenes. chemical and engineering news (2019).
Summers, H. M., Sproul, E. & Quinn, J. C. The greenhouse gas emissions of indoor cannabis production in the United States. Nature Sustainability4, (2021).
Reott, J. How Does Legalized Cannabis Affect Energy Use? Alliance to Save Energy (2020).
Ye, X. et al. Engineering the Provitamin A (β-Carotene) Biosynthetic Pathway into (Carotenoid-Free) Rice Endosperm. Science287, 303–305 (2000).
Giddings, G., Allison, G., Brooks, D. & Carter, A. Transgenic plants as factories for biopharmaceuticals. Nature Biotechnology18, 1151–1155 (2000).
Hu, H. & Xiong, L. Genetic Engineering and Breeding of Drought-Resistant Crops. Annual Review of Plant Biology65, 715–741 (2014).
Wei, X. et al. Wavelengths of LED light affect the growth and cannabidiol content in Cannabis sativa L. Industrial Crops and Products165, (2021).
Sabzalian, M. R. et al. High performance of vegetables, flowers, and medicinal plants in a red-blue LED incubator for indoor plant production. Agronomy for Sustainable Development34, (2014).
LunaTechnologies. Decarboxylation: What Is It and Why Is It Important? LunaTechnologies.
Shah, S. et al.Fast, Easy, and Reliable Monitoring of THCA and CBDA Decarboxylation in Cannabis Flower and Oil Samples Using Infrared Spectroscopy. (2021).
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