Sea of green setups depend on many small plants finishing at the same height and time, which is difficult when you have to pull males mid cycle and leave gaps. Feminized seeds keep the canopy full from the start, though the natural variation between seedlings still matters. A guide to picking feminized lines with tight enough uniformity for that style is available on https://queenfeminizedseeds.com, with a few strains flagged as too variable. Clones remain the ideal for true SOG, but stable feminized packs get close.