Man, I'd totally abandon anything from Scott's or MG! U can get sum cheap non-nutrietive potting soil, and add in some perlite, vermiculite, greensand, dolomitic lime, worm castings, N-rich bat guano, kelp, coco coir, cotton burr, a pinch of epsom salt, blood meal, feather meal, alfalfa meal, for veg, and when u begin flowering, u can add in P-rich bat guano in teas, and add rock phosphate, bone meal, and I use liquid seaweed for both cycles with water to dilute it, as it comes in a concerntrated form, and during flowering, I also use black strap molassas and water about once a week to feed the living soil which helps break down nutes and make them easier for the roots to take up and use... Liquid seaweed/water also makes for a good foliar spray during veg... There's just so many other options out there than pre-mixed soil, that will yield u much better results, without all the possibilities of nute burns or def's... I personally, really frown on MG of any type being used to cultivate cannabis, although I know folks who STILL use that crap on their stuff... I wouldn't put it into my body, even if it were given to me, much less would I buy buds grown with MG...