How I SOG (aka Sea of Green).
The instructions say 1 plant per sq.ft. but I get away with 1 plant per .75 sq.ft. Actually this time around going a lot less. going to do 16 oz. cups all the way through for fun. hoping for 1/4 oz. per plant and can fit 6 in less than 2 sq.ft. gonna see how it works out. gonna lose a few because they are seeds and a male will be in there. Looking at max ht. of 18 inches....gonna be root bound lol.
I trim the side branches and clone them and focus all the energy to the single top cola. So its one single cola per plant.
Many recommend hydro. but dirt is just as easy. Most of the how-to's will show using the wic hydro system. but a rubbermaid DWC would be better IMHO.
Good luck man. Happy growing.