New Research Highlights the Importance of Post-Harvest Cannabis Drying Techniques

How cannabis is processed after harvest, particularly the drying methods used before packaging, can significantly influence product quality. This includes the preservation of terpenes and trichomes, as detailed in two recently published white papers.

The studies, released by cannabis technology company Cannatrol—known for its specialized equipment—found that drying and curing cannabis flowers in an environment with stable vapor pressure helps retain more terpenes by minimizing trichome damage. These findings were conducted by the Cannabis Research Coalition, an organization dedicated to studying cannabis cultivation and post-harvest processes.

Terpenes are aromatic compounds produced by cannabis and many other plants. They are believed to modulate the cannabis experience and may interact with cannabinoids to create the “entourage effect.” Trichomes are the tiny structures on cannabis flowers responsible for producing terpenes, cannabinoids, and other chemical constituents.

The research demonstrated that cannabis flowers dried and cured using Cannatrol’s Cool Cure system showed, on average, a 16% higher retention of terpenes and better trichome integrity compared to those processed using traditional methods. Traditional drying typically involves a room equipped with an air conditioner and a portable dehumidifier.

The key takeaway is that a controlled and stable drying and curing environment can better preserve both terpenes and trichomes. Dr. Allison Justice, founder and CEO of the Cannabis Research Coalition and author of the studies, noted that the Cool Cure system minimized environmental fluctuations during the drying process. “The Cool Cure caused less decarboxylation of cannabinoids and retained 16% more terpenes,” she stated. The stable environment also reduces physical disruptions to the trichome structures.

The second study focused on trichome color variation, which often results from natural aging or mechanical damage. Findings indicated that trichomes were less affected when processed in a stable environment compared to conventional setups with variable temperature and humidity.

Dr. Justice concluded that fluctuations in temperature, humidity, and vapor pressure during traditional drying accelerate the aging process of trichomes. This leads to increased volatilization of terpenes, degradation of cannabinoids, and a browning of the flower. “By drying with vapor pressure control technology, trichome glands are preserved, preventing the loss of quality,” she explained.

Preserving terpenes is beneficial for both medical patients and recreational users. Medically, terpenes have shown potential health benefits and may enhance the therapeutic effects of cannabinoids. For consumers, terpenes contribute significantly to the flavor and aroma profiles of different cannabis strains.

David Sandelman, CTO and co-founder of Cannatrol, emphasized the importance of educating cultivators about post-harvest science. “Maintaining vapor pressure levels keeps trichomes intact and delivers higher terpene retention with every harvest,” he said. “By adopting these new post-harvest methods, cultivators can consistently produce cannabis that excels in flavor, appearance, and effect.”

Additional research supports the significance of terpenes in cannabis. A scientific review from Portugal suggested that terpenes may influence the therapeutic benefits of cannabinoids, although this relationship remains to be fully proven. Preliminary findings indicate that individual terpenes may offer various health benefits, such as myrcene for relaxation and linalool as a sleep aid.

However, the exact role of terpenes in the entourage effect is still under investigation. Some studies suggest that while terpenes have individual benefits, their combined effect with cannabinoids may not always enhance therapeutic outcomes.

Other research published in the International Journal of Molecular Sciences highlighted the complex interactions between phytocannabinoids and biological systems, suggesting potential for new cannabis-based medical treatments. The study emphasized the importance of considering the whole plant rather than isolated cannabinoids when exploring medicinal applications.

Recent federally funded studies have also found that certain terpenes could be effective in managing chronic neuropathic pain, offering pain relief comparable to morphine without the associated risks of addiction or reward response.

As the understanding of cannabis compounds deepens, the significance of post-harvest processes becomes increasingly evident. Proper drying and curing techniques are crucial for preserving the plant’s beneficial properties, which can have substantial implications for both medical and recreational cannabis users.

Conclusion

These new studies underscore the critical role of controlled drying environments in preserving the quality of cannabis. By maintaining stable conditions during the post-harvest process, cultivators can enhance terpene retention and protect trichome integrity, leading to a superior product. As research continues to unveil the complexities of cannabis compounds and their interactions, such advancements in cultivation practices will be essential in maximizing the plant’s potential benefits.