I am not going to say anything more than I use 3.5 inch netpots to grow 4-5 bushes that yield from 5-6 oz to 3/4lb. The point is. It doesn't how big a netpot you get...If you grow a bigass plant and don't tie it to something. It is going to fall over. Now Zandor makes a point...If you grow a bunch of little plants from clones, then you could use 2" netpots, I have 2" 3" 3.5" 5" I use them all.