Plant Senescence

Plant senescence refers to the genetically programmed aging process in cannabis, where leaves, flowers, and other tissues undergo controlled deterioration at the end of their lifecycle. In cannabis cultivation, observable senescence—characterized by yellowing leaves, nutrient translocation, and pigmentation changes—often occurs during late flowering as plants naturally redirect resources toward seed or cannabinoid production. Different cultivars exhibit variable senescence timing and intensity, influenced by both genetics and environmental triggers like photoperiod shifts and nutrient availability. Breeders study senescence patterns to understand plant vigor, nutrient efficiency, and flowering maturity. This trait family intersects with breeding work on yield timing, harvest readiness markers, and resource allocation strategies.

Breeders working with senescence genetics evaluate how quickly and completely plants transition through flowering stages, as senescence timing can indicate harvest maturity and cannabinoid development. Selecting for predictable, synchronized senescence helps standardize crop timing and visual harvest cues across generations.