Hey man. Got this info of the Ready Set Grow High Times DVD, it's 1ft per gallon.

4ft plant will grow nicely in a 4gal pot, so if i were you i'd put it in it's final home in either a 3gal or 4gal pot
s12fever Reviewed by s12fever on . HOW MANY GALLONS SOIL PER FOOT OF CANNIBIS ? HELP!!! :confused: How many Gallons should i give a plant that i plan to let grow only 18" though it's whole life? I mean is it Gallons per foot, is that a good guideline? Rating: 5