In a dioecious out-crossing plant such as C. A Cosmetics Additive. Dry leaves with curled up edges are a telltale sign of heat stress.  Source: <a href=https://belizespicefarm.com/seed-selection-mastery-a-guide-to-cannabis-cultivation-2/>https://belizespicefarm.com/seed-selection-mastery-a-guide-to-cannabis-cultivation-2/</a>