Days To Flower

Days to flower (DTF) refers to the approximate number of days from when a cannabis plant enters the flowering stage until it reaches harvest readiness. This metric is typically counted from the onset of a 12/12 light cycle in indoor cultivation or the natural seasonal shift in outdoor grows. Breeders and cultivators use DTF as a foundational planning tool, as it directly influences crop cycles, resource allocation, and year-round production schedules. Genetics inherited from parent plants establish baseline flowering windows, though environmental factors—temperature, light intensity, nutrient timing, and humidity—can modify actual completion times. DTF classifications range from fast-finishing cultivars (under 50 days) to extended-flowering types (75+ days), each serving different cultivation strategies and regional climates.

Breeders select for DTF duration to develop cultivars suited to specific growing environments and commercial timelines. Shorter-flowering genetics are prized for outdoor growers in cooler climates and multi-crop indoor operations, while extended-flowering varieties often carry lineage from equatorial or high-altitude landraces adapted to longer natural seasons.