nothing wrong with Miracle-Gro, despite some posts in here ,,, the bad boy is Miracle-Gro Potting Soil, avoid that stuff, because its time-release pellets arent controllable by you ... 15/30/15 is fine, I use it too .. powder is fine, just mix it up well, I apply it 'foliar-method' once a week, just spray it on the leaves, underside most important ... do NOT apply it in the sun, the water drops can magnify the sun's rays, and burn the leaves, I do it at 'sundown', gives them all night to feed and dry before 'sun' comes up ... I am switching over to organic Earth Juice nutes this grow, for the first time, but I used nothing but Miracle-Gro on pot plants for 25 years, and my plants always impressed my friends ... :smokin: