Photoperiod Cannabis Seeds

Photoperiod cannabis seeds finish on a light schedule you control. Plants stay in vegetative growth at 18/6 until you flip to 12/12, which lets you decide exactly when the canopy is ready, how long to veg, and how aggressively to train. That flexibility is the trade for a longer total cycle compared to autoflowers.

Photoperiods are the right pick for indoor home growers who want to run SCROG, mainlining, mother plants, or extended vegetative training. They typically reach higher peak yields and bigger flower sites per plant than autoflowers, in exchange for stricter dark-period discipline and more attention to timing. Most photoperiods in this collection do well in a 3×3 tent or larger; a few finish cleanly in a 2×2 with one early top and a SCROG net.

If you want simpler timing or a discreet small-space setup, autoflowering cannabis seeds are usually the easier place to start. If all-female reliability matters, browse our feminized photoperiod seeds for the same control without the gamble of male plants. Read Autoflowering vs photoperiod seeds for a deeper comparison before you commit.