Some people like to knock the Miracle grow soil but ive used it before and had good results. Just got easy on the nutrients, moniter your PH, and you will be fine. You can check your PH with a PH tester you can buy at any Home depot, Lowes, McLendons(for all you washington folks), or other hardware store. You can find one pretty cheap to(10$) but your going to need one.

I dont like texture of MG soil personally, I prefer more perlite.