Flowering Time Weeks 4 5

Flowering Time Weeks 4–5 refers to cannabis cultivars that complete their reproductive cycle in approximately 28–35 days from the onset of flowering (under 12/12 light in indoor cultivation or natural shortening days outdoors). This rapid-cycling classification is often associated with varieties descended from equatorial or fast-finishing landrace genetics, as well as modern breeding work targeting accelerated production cycles. Breeders have long prioritized shorter flowering windows for commercial efficiency and to minimize environmental pressure periods. Plants in this category typically develop mature flowers relatively quickly, though cannabinoid and terpene expression may differ from longer-finishing cultivars. This timing remains uncommon compared to 8–10 week varieties, making it a specialized category within cannabis genetics.

Breeders pursuing this trait often work with equatorial landraces, early-finishing F1 hybrids, or specific selection lines known for precocious flowering. Fast-finishing genetics are valuable for multi-crop annual schedules, disease pressure reduction, and breeding programs where generation time is a limiting factor.