Fixed Life Cycle

Fixed Life Cycle refers to cannabis varieties that complete their reproductive phases on a predictable, calendar-based schedule independent of photoperiod. These plants—commonly called autoflowering or day-neutral varieties—transition from vegetative to flowering growth according to internal developmental timing rather than seasonal light changes. This trait emerged through intentional breeding work incorporating Cannabis ruderalis genetics, which naturally exhibits this behavior in harsh environments with variable daylight. Fixed Life Cycle strains typically flower within 8–12 weeks from seed under most light conditions, making them distinct from photoperiodic varieties that require specific dark periods to initiate flowering.

Breeders leverage Fixed Life Cycle genetics to develop cultivars suited for rapid turnover, outdoor grows at high latitudes, and controlled-environment production without light-timing infrastructure. This trait is often combined with desired aroma, morphology, and cannabinoid profiles from photoperiodic parents to create hybrid lines that retain both autonomy and consumer-facing characteristics.