Light Cycle Triggered Blooming

Light cycle triggered blooming refers to photoperiodic flowering behavior, where cannabis plants transition from vegetative growth to bloom phase in response to changes in day length. Traditional photoperiodic varieties require a shift to shorter daylight periods (commonly 12 hours light / 12 hours dark) to initiate flowering, a mechanism inherited from cannabis ancestry in temperate climates. This trait contrasts with autoflowering lines, which bloom based on age rather than light duration. Breeders working with photoperiodic genetics can control flowering timing through environmental manipulation, making this category foundational for indoor cultivation and breeding programs. Understanding light-cycle dependency is essential for seed selection and crop planning.

Breeders maintain photoperiodic lines to preserve genetic control over flowering onset, enabling precise phenotype selection and multi-generation crosses. This trait remains central to most classic landraces and F1 hybrid development.