Momma's gonna smell the plant eventually, so look into getting some kind of odor neutralizer...

I would also recommend a wider closet for 2 plants. My closet is 22.5" x 22.5" and I fit two plants in there with SCROG (2nd link in my sig). It really depends on the strain you choose also. It's tough to make recommendations on # of plants, because of all the different factors affecting the size of the plants. Really, you can fit as many plants in that space as you can fit pots, just depends on the strain and how long you veg for (amongst other things like lighting and nutrients). Stay away from sativa dominant strains (9+ flowering weeks), as you will run out of room fast. Trial and error is the best way to learn :thumbsup:

Good luck :jointsmile: