Photoperiod 19. Keep the glass there for 12 to 24 hours. All of our feminized weed seeds fall under two subspecies indica and sativa.  Source: <a href=https://www.steripak.cz/cannabis-seeds-market-measurement-share-growth-forecast-2031/>https://www.steripak.cz/cannabis-seeds-market-measurement-share-growth-forecast-2031/</a>