To be comfortable, 3x3 feet and 6 feet of head space.
Allow an 18" spread per plant if you flower them at about 8-10 inches with pinching (once of twice).
You can fill up more space, but that is a good size.
stinkyattic Reviewed by stinkyattic on . Question!!! How big of a room am i going to need for a 4plant veg and 4plant flower i am moving my plants and have to build a new room and was wondering wats the min it will take and how tall it will have to be!! Rating: 5