Flowering Physiology

Flowering physiology refers to the biochemical and developmental processes that govern cannabis plant transition from vegetative growth to reproductive flowering. Rather than a terpene itself, flowering physiology encompasses the hormonal signaling, metabolic shifts, and genetic expression patterns that regulate flower formation, resin production, and secondary metabolite synthesis—including terpene accumulation. Breeders and cultivators study flowering physiology to understand how photoperiod, temperature, and nutrient status influence cannabinoid and terpene profiles at harvest. Key physiological markers include calyx swelling, pistil development, and the timing of peak resin gland maturation. Understanding these mechanisms is foundational to selective breeding for desired chemotypes and consistent production outcomes.

Plant breeders monitor flowering physiology to select for desirable traits like early finishing times, robust resin production, and stable terpene expression across generations. Genetic lines are often evaluated based on their flowering duration, pistil color patterns, and the relationship between visible maturity indicators and actual cannabinoid/terpene development.