I have a soil grow with 11 plants about 12" tall now. They are doing good and need to be transplanted out of their 6" pots. I have some square 2 gal. or round 3 gal. pots. Will the 2 gal pots be good through flowering? My box is 4x4 by 6 foot tall - ... How many plants should I attempt to flower? I was thinking 6? The light is an air cooled 400 wt HID and I will go with a 1000 wt for flowering.