We are just now beginning to study harvest timing with hemp grown for CBD and do not have significantly facts on which to base suggestions. Likely the very best way to time harvest is to monitor trichome colour in mixture with at least weekly testing for CBD and THC levels. Trichomes commence off clear and turn an opaque white when maturing. Following that the trichomes commence to turn amber. If all the trichomes on a plant matured at the very same time, harvesting when they turn opaque white would most likely function. Regrettably, they do not mature at the very same time. Our very best guess from observations final year is to harvest when 20-30 % of the trichomes have turned amber. Quite a few growers are supplementing this strategy with weekly or biweekly samples to indicate exactly where they are in terms of CBD and THC levels. The level of THC your processor may possibly accept could have an effect on when you harvest.
In the image above you see how the trichomes progress from clear to milky white to amber. You will have to have some magnification to see this clearly.
We have observed a number of strategies for drying hemp. Making use of tobacco barns is most likely the Cadillac program, but folks have been thriving with drying in buildings or barns if they could retain superior airflow and maintain humidity at 60% or much less. Bear in mind that soon after you dry the hemp you have to maintain it dry or it will absorb moisture and may possibly mold. I have observed some growers add heat and be thriving, and some be thriving with no adding heat. 1 of the widespread suggestions going about is to add heat to get 20 degrees above ambient temperature. Till we have extra study I would not go above 100 degrees.