Forgot to mention,

The crawl space is likely not a good idea. Reson being, it'll be difficult to maintain and manuver around the plants, prone to mold and mildew AND far more likely to attract insects.

I'd agree on the attic temp wise. Attics can get VERY hot on warm days.

The claim I read was each plant needs 2.5 square feet and can grow to 6-7 feet tall(bushier if topped)
Vancefish Reviewed by Vancefish on . Advise on Growspace Needed Hi, WOW there is a wealth of information on this forum! I was wondering if some of you would mind giving out some advise, I want to start an indoor grow with two goals in mind. 1. Get a good start for my plants that will be going outside in spring 2. Get some plants flowering for personal medical use ASAP I have a few places available to use, 1 huge attic, a wall locker in my garage, or the crawlspace under the house. Rating: 5