i grow a sog setup and i use 1gal pots growing the plants to 10in before flowering remember plants need roots but that's not your focus. smaller pots = more space on the floor. my setup is small 4x4 and i fit 20 plants and yeild about 1.25lbs every 2.5-3mo. the notion you need pots that are larger is not what i have found. the roots do get bound somewhat but as long as you are tending them properly with nutrients and water they can (and still do) absorb all they need for vigerous growth