Circadian Biology

Circadian biology in cannabis refers to temporal patterns in plant physiology and cannabinoid/terpene production that follow light-dark cycles. Research suggests cannabinoid synthesis and terpene accumulation vary throughout the day, with some compounds peaking during specific photoperiods. This observation has influenced breeding strategies aimed at optimizing harvest timing and post-harvest processing windows. Understanding circadian rhythms in cannabis remains an active research area, with growers and breeders noting that collection time can affect chemical profiles. The phenomenon is distinct from circadian entrained effects on human consumers—this terminology addresses plant-level biochemistry only.

Breeders and cultivation researchers use circadian data to refine flowering schedules, harvest protocols, and post-harvest handling to potentially maximize terpene and cannabinoid retention. Precision timing based on circadian patterns is explored as a way to standardize plant chemistry across batches.