A top product trend this year is the rise of solventless cannabis products, according to recent statistics from cannabis market analyst firm BDSA. In fact, from June 2021 to June 2022, BDSA research also showed that the category grew an average of 132% each month.
Copperstate Farms
Nearly all cannabis products start with cannabis concentrates, which are made with a solvent that contains the desirable compounds from cannabis. Solventless concentrates however are made from the cannabis flower without the use of any chemicals and are becoming popular among businesses and consumers. This broad category of cannabis products includes everything from hash to live rosin.
Mitch Lindback, Lab Director at Copperstate Farms, has been growing and extracting cannabis for 15 years and has over a decade of experience working with cannabis derivatives. “Solventless is the truest expression of the cannabis plant,” he says.
Copperstate Farms is one of the largest greenhouse cannabis producers in North America and home to 1.7 million square feet of canopy and 40 acres under glass. Here is an inside look into the company’s solventless creation process:
The Harvest
One of the most important growth factors in cannabis is light, so cannabis grown in full-spectrum light often brings the best flower to harvest. In the weeks before harvesting, the lab conducts a test wash on cannabis plants before hand-selecting which will be used in rosin. Plants are selected based on appearance, aroma and test wash results. On harvest day, all flowers are lightly hand-trimmed and frozen within two hours of harvest.
The Wash
The wash system
Using only chilled RO water and minimal ice, our cannabis extraction experts gently break the trichome heads off the fresh-frozen cannabis using a stainless-steel wash system, by gently agitating the flower. Then they collect the 73μ-159μ trichome heads while pushing the immature trichome heads and stalks to pass through collection bags with a cold spray wash.
The Press
After carefully freeze drying, sifting and packing the hash into double-wrapped mesh rosin bags, Copperstate Farms uses rosin presses to gently express the nectar from the trichome heads using a little heat and a lot of pressure.
The Cure
All live rosin goes through a minimum 7-day cure. “We have found through extensive analytical testing that curing rosin for a minimum of seven days increased its terpene content by over 30 percent,” Lindback says.
The final product: live rosin
The extensive process to create solventless cannabis products is time and energy intensive, but leads to quality offerings, like full melt hash and live rosin. In fact, the solventless category is “primed for premiumization and growth in legal cannabis markets,” according to BDSA retail sales analytics. This is especially true in the dabbable concentrate product category and predicted in the vaping concentrate category as well.
With popular annual holidays like 7/10 (the cannabis community’s holiday for celebrating oil products, dabs and concentrates) gaining traction, solventless products are predicted to grow in market share and are worth cannabis companies looking into producing as demand rises among consumers who are always looking for innovative products that feature solventless concentrate.
As a fast-growing cannabis company, ensuring your business stays compliant with regulatory agencies of all kinds—planning departments, the U.S. Department of Agriculture (USDA), Occupational Health and Safety Administration (OSHA) and so on—is critical for survival. But is your business also compliant with temporary and part-time employment regulations? Violating these often-overlooked regulations can land your company in hot water at best and force you to shut your doors at worst. Here’s what you need to know about risks, regulations, compliance issues and more.
The 30,000-Foot View: Part-Time and Temporary Employees
Cannabis has proven itself to be a high-turnover industry. But in the ever-shifting, post-COVID landscape, many cannabis employers are seeing the financial and logistical benefits of hiring part-time and temporary workers.
Though the terms “part-time” and “temporary” are sometimes used interchangeably, the fact is, there are legal differences in the definitions of part-time versus temporary work. For starters, temporary employees must work for less than a year at a specific organization, and their work must have a defined end date. Temporary employees, or “temps,” often fill vacant roles in a temporary capacity, such as roles previously occupied by someone on parental leave.
Many full-time employees in the cultivation space are defined as “agricultural workers”
Part-time employees, on the other hand, can work indefinitely for a company—but they must work less than 40 hours per week. And, side note, if a part-time employee works more than 1,000 hours in a calendar year, they could be eligible for retirement benefits—so hiring managers, bear that in mind.
For employers, there are some tangible benefits in hiring part-time or temporary workers. For starters, there are often fewer upfront costs associated with hiring part-time workers (like workers’ compensation and healthcare). Establishing a strong part-time and temp employment strategy also allows for employers to quickly scale up or down based on market tendencies or shifts.
Understanding the Risks of Hiring Part-Time or Temporary Workers
While hiring part-time and temporary workers can help businesses stay agile and responsive to market demands or fill vacancies created by recent resignations, many businesses hire these types of employees without a full understanding of associated regulations. And it can get even trickier: many full-time cannabis industry workers in the cultivation space aren’t considered “employees” at all—they’re defined by the federal government as “agricultural workers.”
It’s essential that businesses classify part-time workers and independent contractors correctly. Attempting to claim a worker is part-time when they’re really a full-time employee (a practice known as “misclassification”) can save a business tax dollars in the short-term but lead to sanctions and hefty penalties down the line. For example, if a worker is misclassified and the Department of Industrial Relations finds out, they can sue the former employer for unpaid wages.
Potential fallout from noncompliance with classification or wage and hour issues includes massive fines, potential litigation and more. Federal agencies are extremely sensitive to cannabis business regulatory violations, it’s vital to adhere to proper staffing regulations and compliance. The wrong kind of attention can tank your business’s reputation and halt your operations altogether. I’ve personally worked with numerous cannabis businesses in their hiring and payroll initiatives, and I’ll say this: It may seem like a headache to cross all the “Ts” and dot all the “Is” in the beginning, but it will make a massive difference down the line.
Understanding the Regulations for Hiring Part-Time or Temporary Workers
All employers must adhere to the regulations set forth by the Fair Labor Standards Act, which mandates that part-time employees must be treated the same as full-time employees. That means they must be paid minimum wage, be paid overtime should they exceed their determined hours, have the opportunity to take job-protected unpaid leave, and so on. I really want to stress how essential it is that employers classify their workers appropriately.
It’s also worth noting that many states have specific regulatory structures for employment, both full- and part-time.
In the heavily regulated cannabis industry, employers must exercise strict due diligence to meet all OSHA standards. Additionally, they must identify all occupational hazards and account for employees’ overtime and double time. Grow operations must also adhere to the Field Sanitation Provisions of the Occupational Safety and Health Act, which includes providing toilets, drinking water, hand sanitation facilities and hygiene information.
Avoiding Compliance Problems with Planning and Diligence
There’s a lot more to hiring workers than businesses realize, especially in cannabis. Most companies don’t intend to be noncompliant with regulations—they simply don’t know the regulations, or they’re overwhelmed by hiring and growing so quickly. To make sure you’re compliant, you might consider building out your HR team, educating yourself as the business leader and reaching out to staffing and HR professionals in the space who can answer your questions. In this rapidly growing industry, which seems to shift and change every day, planting your feet firmly on solid regulatory ground will serve to benefit you in the event of federal legalization, massive business growth or initiatives you may want to undertake in the future.
Cannabis extraction and manufacturing is big business in California with companies expanding brands into additional states as they grow. This is the third article in a series where we interview leaders in the California extraction and manufacturing industry from some of the biggest and most well-known brands.
In this week’s article we talk with Joaquin Rodriguez, chief operations officer at GenX Biotech. Joaquin was introduced into the cannabis industry through a close personal relationship and has spent seven years researching and navigating the cannabis market before jumping into his career with GenX Biotech. The interview with Joaquin was conducted on August 4, 2020.
Next week, we’ll interview Michael Schimelpfenig, head of R&D and BHO extraction manager at Bear Extraction House. Stay tuned for more!
Aaron Green: Hi Joaquin! I appreciate you taking the time to chat today. I’m glad we were able to connect!
Joaquin Rodriguez: Absolutely! I’m looking forward to it.
Aaron: Me too! So, I like to start off the interview with a background question so people get a chance to know about you better. How did you get involved with GenX Biotech?
Joaquin Rodriguez, chief operations officer at GenX Biotech
Joaquin: I went to school at Cal Poly for mechanical engineering and spent some time in the oil industry. In 2011 I was introduced to who would be the future founder of GenX Biotech, Shea Alderete. I spent 7 years diving into cannabis industry to better understand the landscape and Prop 215 (California’s Compassionate Use Act of 1996) and then Prop 64. In late 2017, I joined GenX Biotech to spearhead the acquisition of licensing and scale up distillate manufacturing.
Aaron: Awesome. My next questions are focused on product development. What is your decision process for starting a new product at GenX Biotech?
Joaquin: Our founder, Shea Alderete, is an innovator in product development. He specializes in formulations and new formulas for vape products. We are big on gathering empirical data. In any new product we will run a small batch and test first with heavy cannabis users to gauge their reaction to the product. We will then test with light cannabis users and finally new cannabis users so we get the full spectrum of user experiences. Throughout the process, we are gathering empirical data on things like taste and perceived therapeutic effects.
Aaron: Are you personally involved in manufacturing? Tell me about your process.
Joaquin: I am, yes. We specialize in large scale distillate manufacturing to make THC oil and we formulate batches using cannabis-derived terpenes. This what we call Sauce, a full spectrum high-terpene extract obtained from a butane hash oil (BHO) process. This is a separate extraction method from our alcohol extraction process.
Aaron: Very insightful! What is your process for developing new products?
Joaquin:GenX Biotech’s core mission is to bridge the gap between cannabis culture and the science behind cannabis. We focus more on therapeutic effects as well as recreational. We keep a pulse on the industry as a whole to see what people are doing and saying as well as new extraction methods. When we capture that data we evolve and adapt and create new formulations based on that preference and test it out. It’s a constant game of “does this look good? taste good? make you feel good? how is the potency?” It’s really a big collaboration with our end users.
We will also collaborate with other brands and manufacturers to stay ahead of the curve, share information that can make us a better company, more power in numbers is what we say. As an example, Wonderbrett is known for their high-quality flower. They have a high-end product and high-end brand recognition. We would, for example, strategize and collaborate together to utilize a unique cannabinoid and terpene profile and test that with our vape products in the market. It’s more of a collaboration than a white label relationship. In this way, Wonderbrett can expand into the extracts space via their brand. We do this with other brands as well where we’ll use their raw material and joint market the brands on the final product.
Aaron: Fantastic. Are you developing new products internally?
Joaquin: We develop all our products 100% internally.
Aaron: Do you ever bring in external product development consultants?
Joaquin: Not for products, however there are certain situations, like hardware development, where we will work with outside groups that specialize in equipment manufacturing to create something specific and one off for us. We are currently working on bringing to the market an FDA-approved inhaler technology device that is a non-combustible metered delivery device that we are really excited about. In addition, we have an incubator program with our LA partners to introduce new brands to the market which is a great asset for consulting brands looking for a home and multistate resources.
Aaron: Very cool, that’s the first I have head of inhalers in the market. For my next question feel free to answer however you like. What does being stuck look like for you?
Joaquin: Getting stuck can happen in a few different areas. With respect to manufacturing, the main bottleneck issues are consistent quality of the raw biomass materials. Mother nature does not duplicate the same results exactly every time and fluctuations can affect the cost and quality of raw goods. Other things like wear and tear on manufacturing equipment are not normally an issue as everything is stainless steel and pretty stable. But things like valves, gaskets and grommets tend to wear down with consistent use. When those fail, a whole operation can be shut down. We keep a stockpile of those on hand to make sure we stay in production.
“I support the leaders that help increase the overall knowledge for consumer and patents to know the difference between a quality product and a boof product.”Aaron: If you get stuck is it usually the same place? Or is it different each time?
Joaquin: Like I said, if we get stuck its usually in the sourcing of raw materials. Cultivators can have a bad crop or weather might affect their crop. It almost always comes down to the relationship with your cultivators. They fuel the industry and are the back bone of the whole supply chain. If they have any issues it affects everyone down line.
Aaron: Do you ever hire outside consultants when you get stuck?
Joaquin: Not really. We rely on our experience and years of operating and going through our own failures to navigate any issues with manufacturing. Collectively we work together to pivot and adapt to the ever-changing legal cannabis landscape. We do on occasion outsource to a 3rd party to help acquire raw goods. On the other hand, we separately consult for other people and groups looking to build out labs!
Aaron: That’s an excellent position to be in! For the next question imagine there’s a magic wand. What does your magic helper look like?
Joaquin: Someone that can come in and help with taxation. Triple taxation is tough. There’s the cultivation tax, manufacturing tax, state tax and local taxes. Long Beach recently lowered their local tax from six to one percent, so that is encouraging, but there needs to be a fair taxation for this industry to really thrive.
Aaron: What’s the most frustrating thing you are going through with the business?“I’m really excited for the continued education and deregulation of cannabis and its medical applications.”
Joaquin: I think that would be sales downline. With Prop 215 and the transition to prop 64, legal outlets have been heavily truncated. There are now approximately 600 legal retail outlets down from a high of about 4500 prior to prop 64. The competition landscape is really high and it’s hard to get product on the shelves without proper capital to keep the brand going. It is advantageous to partner with an established distro in order to get involved with their downline and run lean and mean.
Aaron: Now for our final question. What are you following in the market and what do you want to learn about?
Joaquin: I’m really excited for the continued education and deregulation of cannabis and its medical applications. It never should have been illegal to begin with, but with government corruption and greed it was targeted and use for multiple agendas. I support the leaders that help increase the overall knowledge for consumer and patents to know the difference between a quality product and a boof product. You have seen the results of the vape scare and there’s a good reason for it. Most people don’t want to pay the high ticket for legally compliant product so they turn to the illegal side where no regulation or testing is conducted to ensure they are getting safe, quality products.
In addition, the demand is so strong that illegal producers are able to put whatever they want in their products and sell them as if they are legit, provided they have the knock-off packaging, and those operators further harm those people because the state they are selling in hasn’t adapted to the times and has prohibited the availability of legal cannabis. Their inaction and support of the continued “war on cannabis” makes them just as guilty in the results of those people who have fallen ill or been hospitalized.
There have been lots of new studies published that are slowly making their way into social media and reaching consumers so that is encouraging. Another important element is the education of bud tenders because they are the face of the brand when the customer or patient is at a legal dispensary so they need to be educated on what makes for a quality product and how it can help or achieve a desired result for a customer or patient.
Aaron: Well, that concludes the interview Joaquin. Thanks for taking the time today to talk. This is all awesome feedback for the industry. Thanks so much for these helpful insights into product development in the cannabis industry.
Cannabis extraction and manufacturing is big business in California with companies expanding brands into additional states as they grow. This is the second article in a series where we interview leaders in the California extraction and manufacturing industry from some of the biggest and most well-known brands. Click here to see Part 1.
In this week’s article we talk with Matthew Elmes, director of product development at Cannacraft. After cutting his teeth in academic and industry research, Matthew was approached by Cannacraft leadership to bring a new perspective to their product development efforts. The interview with Matthew was conducted on July 22, 2020.
Next week, we’ll interview Joaquin Rodriguez, chief operating officer at GenX BioTech. Stay tuned for more!
Aaron Green: Hi Matthew, and thank you for taking the time to chat today, I understand you have a busy schedule!
Matthew Elmes: Thanks – yeah, last week was pretty insane!
Aaron: Well, I’m happy we found a chance to put this together. Let’s start from the beginning. How did you get involved at Cannacraft?
Matthew Elmes, director of product development at Cannacraft
Matthew: I did my Ph.D in biochemistry at Stony Brook University on cannabinoid intracellular transport and metabolism. I then did a post-doc with Artelo Biosciences in endocannabinoid system modulation. While I was doing my post-doctoral research, Dennis Hunter, co-founder of Cannacraft, had learned about my work and reached out to offer me a position.
Aaron: Awesome, that’s a great feeling when people are reaching out to you! The next questions here will be focused on product development and manufacturing. What is your decision process for launching a new product?
Matthew: We do our best to anticipate what the market will want. A lot of our new product development comes from improving our current products. Things like improving stability, shelf-life and reducing bitterness. For brand-new products and technologies, we first get a lot of feedback from the marketing and sales teams and will then go into a planning session to decide what is feasible and what is not prior to moving forward.
Aaron: Do you personally get involved in manufacturing? Tell me about your process there.
Matthew: I do get involved in manufacturing. My main inputs are figuring out how much cannabis oil to use to hit a target potency around the size of a batch. This is the type of thing I do for all our beverage products like HiFi Hops, our Satori line of infused edibles, and the various gummy products sold under our brands Absolute Xtracts and Care By Design.
Aaron: Are you developing new products internally?
Matthew: For the most part we develop everything internally. We are very vertically integrated here at Cannacraft and we extract all of our oil in house. I don’t do the oil extractions myself. Most of our stuff is supercritical carbon dioxide extraction, but we have hydrocarbon and cryoethanol extraction facilities opening soon. For our gummies, we use distillate oils for the best flavor and for our droppers/vapes we use full-spectrum oils for a more sophisticated array of effects.
Aaron: In product development, what does getting stuck look like for you?
Matthew: Getting stuck happens a lot! You know, strict regulations make it challenging to source ingredients. Foods we’d like to source for a product are often too high in pesticides or heavy metals for the cannabis regulations. What’s good enough for the grocery store is very often not good enough to be compliant in the California cannabis industry. Fruits that are totally free from pesticides are hard to find. Our edibles brand Satori Chocolates actually might be the only player in the entire California cannabis industry that uses real whole fruit in our products rather than something artificial or a processed fruit paste. We actually had to source our strawberries from Italy to find ones that were both compliant in metals/pesticides and tasted good enough to meet our high standards! The same sort of challenges apply to sourcing biomass for oils.
Aaron: If you get stuck is it usually the same place? Or is it different each time?
Matthew: We’re so diversified. We have lots of different products. The process for each one can have its own issues. The problems you encounter with cannabis beverages are not the same ones that you’ll encounter with vapes, edibles, topicals or sublinguals, etc. We are one of the oldest players in the California cannabis industry (CannaCraft was founded in 2014, well before regulated recreational cannabis was a thing) so we have the advantage of working on all these issues for years longer than most of our competitors and we have largely figured out all the major ‘kinks’ already. A big part of it is also that we have assembled a great team of food scientists, chemical engineers, chemists, legal and regulatory experts, all with diverse specialties that allows us to quickly address any new ‘stucks’ and be fully confident in all of our products.
Aaron: Feel free to answer the next question however you like. What does your magic helper look like?
Matthew: I would love a magic helper! What would a magic helper look like to me? I think my magic helper is a recent undergrad with lab experience. I would have them take care of a lot of the quality and lab day to day activities. My responsibilities often make me too stuck to the computer screen where I don’t have time to get to all the experiments that I’d like to do…a trained magic helper could physically perform those experiments for me!
Aaron: OK, and now for our final question! What are you following in the market and what do you want to learn about?
Matthew: I am personally really interested in yeast grows and cannabinoid synthesis from biological organisms. We stick to only natural plant-derived cannabinoids for all our products, but it’s a new field that’s just fascinating to me. I also think that minor cannabinoids will have a bigger place in coming years. In particular I have my eye on THCV, ∆8-THC, CBG and THCP. THCP is a phytocannabinoid that was just discovered a year ago and exhibited very potent effects in preclinical models, but no one has been able to produce and purify it in appreciable amounts yet. We already manufacture and sell a ∆8-THC vape cart under our ABX brand, but for the others keep an eye out for new product announcements from us that are on the horizon.
Aaron: Well, that brings us to the end of the interview Matthew, this is all awesome feedback for the industry. Thanks so much for your time and insights into product development in the cannabis industry.
For years, tetrahydrocannabinol (THC) got all the attention. While THC certainly delivers its own benefits (such as relaxation and pain relief), there’s a whole host of other – and often overlooked – compounds found in cannabis with important benefits as well. THC is truly only the tip of the iceberg when it comes to cannabis’s potential.
As the cannabis industry evolves with changing consumer tastes and developing medical research, growers may employ techniques to boost cannabinoid and terpene profiles in their harvests – beyond merely focusing on THC. Advanced LEDs allow growers to elicit specific biological responses in cannabis crops, including increased concentrations of these naturally occurring chemical compounds.
The Foundation of Cannabis’s Effects Whether used medicinally or otherwise, cannabis has changed our society and many of our lives – and there’s a collection of naturally occurring chemical compounds, known as cannabinoids and terpenes, to thank.
The cannabinoids THC and CBD are the most common and well-researched, however they are accompanied by more than 200 additional compounds, including cannabinol (CBN), cannabigerol (CBG) and tetrahydrocannabivarin (THCV), among others.
The cannabis plant also contains terpenes. These structures are responsible for giving flowers (including cannabis), fruits and spices their distinctive flavors and aromas. Common terpenes include limonene, linalool, pinene and myrcene.
Both cannabinoids and terpenes are found in the cannabis plant’s glandular structures known as trichomes. Look closely, and you’ll notice trichomes coating the cannabis flowers and leaves, giving the plant an almost frosty appearance.
A macro view of the trichomes and pistils on the plant
Trichomes – which are found across several plant species – are a key aspect of a cannabis plant’s survival. The specific combination of metabolites produced by trichomes may attract certain pollinators and repel plant-eating animals. Moreover, trichomes (and specifically THC) may act as the plant’s form of sunscreen and shield the plant from harmful ultraviolet rays.
While they play an essential part in the cannabis plant’s lifecycle, trichomes are volatile and easily influenced by a range of environmental factors, including light, heat, physical agitation and time. Therefore, environment is a defining variable in the development of these important structures.
How LEDs Support Cannabinoid and Terpene Development in Crops Spectrally tunable LEDs give indoor cannabis growers unparalleled control over their crops. As research has expanded about plants’ responses to the light spectrum, growers have discovered they are able to elicit certain physiological responses in the plant. This phenomenon is called photomorphogenesis. At its root, photomorphogenesis is a survival tactic – it’s how the plant responds to miniscule changes in its environment to increase the chances of reaching full maturity and, eventually, reproducing. While cultivated cannabis plants won’t reproduce at an indoor setting, growers can still use the light spectrum to encourage strong root and stem development, hasten the flowering process and the development of bigger, brightly colored flowers.
It makes sense that using the proper light spectrums may also have an impact on the production of specific cannabinoids and terpenes – an important factor when responding to highly specific consumer needs and desires, both within medical and adult-use markets.
Here are a few more reasons why utilizing full-spectrum LEDs can lead to higher quality cannabis:
Lower Heat, but the Same Intensity. When compared to HPS, fluorescent and other conventional lighting technologies, LEDs have a much lower heat output, but provide the same level of intensity (and often improved uniformity). This represents an enormous advantage for cannabis cultivators, as the lights can be hung much closer to the plant canopy without burning trichomes than they would be able to with other lighting technologies.
UV Light. Cannabinoids and terpenes are part of the cannabis plant’s natural defense mechanism, so it makes sense that lightly stressing plants can boost cannabinoid and terpene numbers. Some studies illustrate an increase in UV-B and UV-A light can lead to richer cannabinoid and terpene profiles.1 It’s a fine line to walk, though – too much UV can result in burned plants, which leads to a noticeable drop in cannabinoids.
Full-Spectrum Capabilities. The cannabis plant evolved over millions of years under the steady and reliable light of the sun. Full-spectrum is the closest thing to natural sunlight that growers will be able to find for indoor growing – and they’ve been shown to perform better in terms of cannabinoid development. A 2018 study titled “The Effect of Light Spectrum on the Morphology and Cannabinoid Content for Cannabis Sativa L.,” explored how an optimized light spectrum resulted in increased expression of cannabinoids CBG and THCV.2
This is the most important tip for indoor growers: your plants’ environment is everything. It can make or break a successful harvest. That means cultivators are responsible for ensuring the plants are kept in ideal conditions. Lights are certainly important at an indoor facility, but there are several other factors to consider that can affect your lights’ performance and the potency of your final product. This includes your temperature regulation, humidity, the density of plants within the space, CO2 concentration and many other variables. For the best results, your lights should be fully aligned with other environmental controls in your space. Nothing sabotages a once-promising crop like recurrent issues in the indoor environment.
Indoor cultivation facilities often use high powered lights that can give off heat
Cannabinoids and terpenes take time to develop – so cultivators will want to avoid harvesting their plants too early. On the other hand, these compounds begin to degrade over time, so growers can’t wait too long either.
Cultivators seeking potent cannabinoid and terpene profiles must find a happy medium for the best results – and the best place to look is where cannabinoids and terpenes develop: the trichomes. With a microscope, cultivators can get up close and personal with these sparkly structures. Younger plants begin with clear trichomes, which eventually become opaque and change to amber. Once your plants show amber-hued trichomes, they’re ready for harvest.
The truth here is that there’s no perfect formula to elicit show-stopping cannabinoids and dizzying terpenes with every harvest. A lot of cannabis cultivation is based around trial-and-error, finding what works for your space, your business and your team. But understanding the basics around indoor environmental controls like lighting and temperature – and how they can affect the development of cannabinoids and terpenes – is an excellent place to start. Using high quality equipment, such as full-spectrum LED lighting can boost both cannabinoid and terpene production, resulting in richer, more potent and higher quality strains.
References:
Lyndon, John, Teramura, Alan H., Coffman, Benjamin C. “UV-B Radiation Effects on Photosynthesis, Growth and Cannabinoid Production of Two Cannabis Sativa Chemotypes.” August 1987. Photochemistry and photobiology. Web. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1751-1097.1987.tb04757.x?&sid=nlm%3Apubmed
Magagnini G., Grassi G., Kotiranta, S. “The Effect of Light Spectrum on the Morphology and Cannabinoid Content of Cannabis sativa L.” 2018. Medical Cannabis and Cannabinoids. Web: https://www.karger.com/Article/FullText/489030
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