No, MG is no good. Sure, you can grow a plant in veg. using MG and it will make it, but when flowering hits, MG is NOT a good choice. Mainly because it is not made for resin producing plants. You can grow cannabis using MG, but there are far better nutes out there for a couple extra bucks that will increase yeilds big time.

Also, it's a chem. fert, and if you're like me, youw ant to keep things organic for prime taste and potency. The only time I use a chem. fert is a bloom blast fert that is 10-52-10, during the last 4 weeks of life so the buds thicken right the fuck up.

So no, avoid MG altogether. Wal_mart's Plantsmart brand is better to use than that crap.