i use osmocote plus and dynamite time released fertilizer with phenomenal results. so easy and the results are amazing. i have stopped using all mmj specific nutes. i have never used the miracle grow so cant give any feed back. i find there is a slight edge using dynamite all purpose select over the osmocote plus because it handles heat better. time released fertilizers are sensitive to hot rooms. if your grow area is under 82 degrees your fine with osmocote plus. do a google search for 420 magazine osmocote and there is a huge thread about the use of osmocote. i love spending about 2 bucks on fertilizer for a whole grow. yesss