keep at it even in the 1 gallon geopots I use still a much better formed root structure(I like the 3+ gallon you can grow some pretty big plants in 3 gal geo) especially if you're using ogbiowar nutes or mycos. Are you using smarties or some other brand than Geopots? Try GeosThey claim the fabric pots are exceptional for air pruning of the roots. I have recently just used the 1 gallon size but I did not really see any amazing results because of them. the fabric pots are re usable but they are a pain to clean and they are a pain for transplanting to