Photoperiod seeds require you to change the lighting conditions for the seeds to enter and maintain the flowering phase. They grow more quickly and produce more buds than sativa. ILGM has a wide-ranging strain selection, with both feminized seeds and auto-flowering seeds available on the site.  Source: <a href=https://lkc.hp.com/member/weedseeds>https://lkc.hp.com/member/weedseeds</a>