Phenology

Phenology in cannabis refers to the timing and sequence of growth stages—germination, vegetative development, flowering initiation, and maturation. Breeders classify strains by phenological traits to predict harvest windows, environmental responsiveness, and photoperiod sensitivity. Early-finishing, mid-range, and late-maturing phenologies represent distinct genetic expressions shaped by ancestral geography and selection pressure. Understanding phenology is essential for cultivation planning, seed preservation, and breeding programs targeting specific growing seasons or climate zones. Lineage records frequently document phenological characteristics as a key descriptor alongside terpene profiles and plant morphology.

Breeders working in this category select for photoperiod sensitivity, flowering speed, and climate adaptation to create strains suited to specific growing environments—from short-season outdoor regions to controlled indoor settings. Phenological stability across generations is a primary selection criterion for producing reliable commercial and heirloom cultivars.