Started nelumbo nucifera from seeds 10 days ago and has grown rapidly since then. Roots also started forming already. When I pot them, should I pot each individual seedling per pot? Or like 3 or 4 plants per pot? I'm not sure how much space they might need and I don't want them to tangle each other neither by root or leaves. Also, I am moving into a new house next week and there is already and existing pond. What if the pond was deeper than the lotus height itself? Should I still completely submerge them and they will eventually grow its leaves to the surface?