Well that's just the thing, i'm not really sure. I have limited space (width/length) but as for how tall the plants are going to get doesn't really matter.

I'd really like to grow them in a closet. It has a vent that would work perfect and some electrical outlets. The only problem is the closet is pretty small. Maybe 2' deep x 3' wide. How many plants/plant do you think i could fit in there?