Tag Archives: output

Beyond THC: Encouraging Cannabinoid and Terpene Production with LEDs

By Andrew Myers
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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.

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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.

solsticegrowop_feb
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:

  1. 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
  2. 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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How Cannabis Can Positively Impact California’s Drought

By Lukian Kobzeff
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As the drought in California persists and quickly becomes the new hydrological norm, many within the state have embraced efforts to find ways and means to live within the drought forced water “budget.” Because of the importance of water conservation, the cannabis industry should embrace its socio-ecological responsibility and seize the opportunity to help shift the perception of cannabis cultivation into that of a sustainable, high-value agricultural crop that can be grown in an environmentally safe manner, while using water efficiently.

The intersection of Prop 64, MCRSA and the drought provides the cannabis industry with a unique opportunity to positively impact water conservation. Because legal cannabis cultivators are just now designing blueprints for grow sites, these cultivators are in a position to build infrastructure and systems specifically designed to achieve permanent, sustainable water conservation.

By embracing and championing water conservation, the cannabis industry will achieve two goals: being a collaborative player in the larger community working towards sustainable water use and enhancing the overall perception of the cannabis industry in the conscious of the general public. For an industry seeking legitimacy, there is no better way to put cannabis in the mainstream conscious than by embracing environmentally responsible philosophies. Here are a few measures the cannabis industry should embrace:

Measure

The current drought has generated a state-wide conversation about tracking and recording water usage. Some commentators believe California is suffering from a water data problem. Recently passed AB 1755 is a step by California to address that shortcoming by creating a technology platform to aggregate and share water data. Cannabis cultivators should get onboard with measuring water usage. One method is to install sensitive flow meters in each drip station to precisely measure water used during each grow cycle. First, this provides the cultivator with a precise data set. Precise data sets are extremely important, especially when trying to achieve the two-part-goal of conserving water and maximizing crop yield. Second, having precise data sets allows the cultivator to determine, from harvest-to-harvest, increasingly precise ratios of input (water) to output (flower). Most likely, this input:yield ratio is subject to diminishing returns at the margin; that is, adding additional water will not proportionately increase crop yield. For instance, 50 units of water could produce 50 units of crop, but 75 units of water might only produce 55 units of crop. By measuring the input (water), the cultivator is able to identify the precise threshold where diminishing returns set in and can therefore reduce the “diminishing returns” water usage, saving money and conserving water.

Collaborate

Building on water-usage data collection, cultivators can then collaborate with each other and with water agencies. By sharing data sets, cultivators can quickly develop ideal input:yield ratios, can better understand how water usage fluctuates within each discreet grow cycle and can develop methods such as deficit irrigation and real-time soil moisture measurements. This collective industry knowledge will help each individual cultivator to reduce water-usage. In collaborating with local water boards, the boards will better understand how much water is being used and conserved by the industry. Additionally, if the boards have a more precise understanding of the expected usage per season or per specific period in a grow cycle required by cultivators in their jurisdictions, those boards can better plan for the peaks and troughs in water demand. Besides data sharing, agencies and cultivators can collaborate in developing “fill stations” (offering free, non-potable recycled water for irrigation), or help fund development of direct potable water technologies and other recycled water technologies. Collaboration amongst growers and with water boards will lead to greater water conservation.

Energy Saving

An ancillary benefit to water conservation behaviors is the reduction of energy consumption. It takes an immense amount of energy to pump and transport water to end-users, such as cultivators. Reducing water usage in turn reduces energy consumption, because less water used means less water transported and disposed of. This is one method for indoor cultivators to offset energy consumption. In addition to reducing energy usage by conserving water, cultivators can follow Irvine Ranch Water District’s example of implementing an energy storage system to reduce costs and ease energy demand during peak hours. Indoor cultivators should adopt the same basic structure and mechanics: install Tesla battery packs to store energy for use during peak hours (when electricity is more expensive) and recharge the batteries at night when demand is low (and electricity is cheaper).

Opportunities Abound

This is an exciting time in California’s history, with the pending election of Prop 64, the passage of MCRSA, and the opportunities present in the water-energy nexus. The $6 billion cannabis industry has an incredible opportunity to have a far-reaching impact on water-conservation. By being an active collaborator conserving water, the cannabis industry can position itself as a trendsetter and private sector leader in sustainable and eco-conscious methods, technologies, and processes.