I recommend you transfering to scotts soil... or any good soil... and in a 5gal Paint bukcet pots( take up the same amount of space with 150% more room.. add purely soil( i dont fool with mixtures) and water the new soil so that it is a little beyond moist.. but not drenched. then very carefully, and sense you have cheap plastic pots, you can just take an exacto knife or scissors and cut it in half. I know that seems scary but its no big deal. This work in your favor based on how your roots will probably be around the edges and holding on tight to soil and pot its already in. now sense yyou have so much real esate as far as soil goes.. it will so much much harder to over nute, or overwater.. i even just water half the pot at one time so im sure to keep the roots oxygenated which is key to fast growth.. add your nutes 1/2 stenght after a week then, full strength, if the seem to be liking it a week to two after that