Growth Cycle

Growth Cycle in cannabis genetics refers to the photoperiod response that determines when a plant flowers—either triggered by light duration (photoperiodic) or age-dependent (autoflowering). Traditional photoperiodic cultivars require a shift to shorter daylight hours to initiate bloom, typically 12 hours of uninterrupted darkness. Autoflowering varieties, derived from Cannabis ruderalis genetics, transition to flowering independently after a set vegetative period, regardless of light conditions. Understanding growth cycle classification is essential for breeders optimizing cultivar timing, indoor/outdoor suitability, and production schedules. This trait directly influences breeding strategy, environmental control requirements, and regional cultivation feasibility.

Breeders select for growth cycle traits to create cultivars suited to specific growing environments and market demands. Autoflowering crosses expand cultivation into short-season regions and enable faster multi-crop cycles, while photoperiodic lines remain preferred for maximizing yield and genetic stability in controlled settings.