I have 4 plants. 2 of them are about 12" and the next in line is about 8" and the little one is 6".The 6" one was started about 10 days later than the others.[ 1 died ] The height right now is after I did HST to them yesterday.What I want to know is ,Should I leave them alone or should I adjust them to all being the same height. As always I do appreciate it.