i'm using mg with excellent results; the important thing is the ratio.

i use 24-8-16 all purpose plant food for veg and cease feeding 1 week before flower.

4 days into flower, i feed with MG 15-30-15 all purpose plant food.

just make sure that if you use miracle gro, you are getting the right kind(if you can't use it on garden vegetables, you don't want to use it on something you smoke) key words to look for are "ALL PURPOSE PLANT FOOD''

hope this helps, keep us updated!

love, brooke