I'm growing in a 4'X2' closet and the ventalation is poor but if I keep open/closeing the door then its fine. Three started at the same time, but it's amazing how different they all are. I'm seeing some amazing full growth from the #1, however the #2 is not filling out so well, I think she's cramped by 5 plants in the closet. but that'll change today. I've decided to flower the one (#1) for sure, (really the decision came down to running out of room in the Veg. closet and to poss. get ahold of some differenct strains soon.)#3 is being bend left, right and all over. It's looking like there could be 8 or more tops to the thing, going to let it Veg more cuz it's only 14 inch. tall and pretty skimpy.