How much stress is good?
Happy #FactFriday , all! Let’s talk about drought stress. Usually we think of stress as something that’s bad for plants. However, there’s an interesting thing that happens with plants that produce oils.
Cannabis, like other oil-producing plants such as rosemary and sage, produces oily substances as a defense mechanism. Interestingly, it has been shown in research that the production of these substances actually increases when a plant is stressed. It makes sense: the plant produces some oils to defend itself, and when it’s stressed, it must be under attack from something, so it produces more oils for more defense.
#CannabisGrowers can use this to their advantage. An element we easily control when growing plants is their water intake, so we can cause stress by simulating a drought (reducing water). If you want to read more about it, we found a cool paper this week by Dixon and Zheng (2019). They found that after 11 days of drought stress during a flowering phase, the dry flower weight and cannabinoid content was increased compared to a non-stressed control group.
The drought took plants to their wilting point at around 5% soil moisture or -1.5 MPa of pressure, where leaves were visibly wilting, then harvested the flowers and went through a typical drying/extraction process to measure THC and CBD.
Have you tried using drought stress? How did it work out? Let us know in the comments!
Caplan, D., Dixon, M., & Zheng, Y. (2019). Increasing Inflorescence Dry Weight and Cannabinoid Content in Medical Cannabis Using Controlled Drought Stress. HortScience, 54(5), 964-969.
#sustainablecannabis #sustainablehemp #cannabisfacts #cannabisscience #cannabiseducation #growyourownweed #cannabisgrow #cannabisgrower - 14 hours ago