Long Day Photoperiod
Long day photoperiod refers to cannabis plants that flower based on day length thresholds, typically requiring extended light periods (14+ hours) or, conversely, short dark periods to initiate and sustain reproductive development. This classification contrasts with short day photoperiod varieties, which flower under longer nights. Long day photoperiod plants are uncommon in cannabis genetics; most cultivated strains are short day (photoperiod-dependent) or day-neutral (autoflowering). Breeders occasionally encounter long day traits in landraces or experimental crosses, though practical cultivation challenges limit widespread adoption. Understanding photoperiod classification helps growers select appropriate lighting schedules and helps breeders document genetic architecture underlying flowering responses.
Long Day Photoperiod strains
No strains tagged into Long Day Photoperiod yet — they'll appear here as breeders submit lineage records under this classification.
Long day photoperiod refers to cannabis plants that flower based on day length thresholds, typically requiring extended light periods (14+ hours) or, conversely, short dark periods to initiate and sustain reproductive development. This classification contrasts with short day photoperiod varieties, which flower under longer nights. Long day photoperiod plants are uncommon in cannabis genetics; most cultivated strains are short day (photoperiod-dependent) or day-neutral (autoflowering). Breeders occasionally encounter long day traits in landraces or experimental crosses, though practical cultivation challenges limit widespread adoption. Understanding photoperiod classification helps growers select appropriate lighting schedules and helps breeders document genetic architecture underlying flowering responses.
Breeders tracking photoperiod genetics document long day responses to build breeding records and understand dormancy mechanisms. Crosses involving long day traits inform research into the genetic basis of flowering time and light-response pathways in Cannabis.
Educational reference · Cultivar metadata only · No medical claims