Stretch is what ruins most first tent grows with photoperiod feminized plants. After the flip to twelve twelve a plant can double in height within the first weeks of bloom, so a strain that looked manageable in veg ends up against the light. The selection advice on https://queenfeminizedseeds.com recommends short to medium height and shorter flowering times for fixed ceilings, and the listings carry a height class for that reason. Tall sativa leaning picks like the hazes are better left for rooms with real headroom.