Short Day Plant

Short Day Plant (SDP) is not a terpene but rather a photoperiod classification describing cannabis cultivars that initiate flowering when daily light exposure falls below a critical threshold, typically 12-14 hours. This trait reflects the plant's evolutionary adaptation to seasonal light cycles in its native geographic regions. Understanding photoperiod sensitivity is fundamental to cannabis breeding programs, as it directly influences cultivation timing, harvest scheduling, and geographical viability. Lineage records frequently report photoperiod classification alongside terpene profiles, as both traits affect commercial and breeding outcomes. Most modern cannabis strains are either short-day (photoperiod-dependent) or have been backcrossed with auto-flowering genetics to remove this dependency.

Breeders working with short-day genetics must account for strict light-cycle requirements during breeding cycles and seed production. This classification is critical when selecting parent plants for regional cultivation programs, as SDP cultivars may not complete flowering under extended summer photoperiods in high-latitude growing regions.