‘Hot’ Hemp Due to Genetics, Not Environment
A study published by Cornell University found no evidence that environmental or biological stresses on hemp plants caused their THC levels to increase. When THC levels exceed 0.3%, the crop is classified as “hot” and cannot be sold as hemp. This study helped show that genetics, and not conditions such as disease or drought, determine the THC level of hemp plants. Scientists note that more research and breeding is needed to select appropriate genetics that lead to high CBD but low THC, and they recommend that growers make sure they get high-quality CBD-producing seeds to reduce their risk.