I don't know 'bout them MG nutes, chief. I used MG soil and MG 15-30-15 on my first grow(bagseed), and it turned out killer. But I'm also using it now on my second grow(Nirvana NL) and my plant is budding sort of slowly and not developing trichomes at all. I'm sure it's okay fertilizer but you might want to use it mixed really weak. Also watch out for Magnesium deficiency, I had that problem with my first grow and corrected it with 1/4-1/2 tsp. of epsom salts per gallon. MG doesn't have any magnesium or calcium in it that I know of. I think for my next grow I'll use some different soil, mix in a little dolimitic lime with it, and I might not even fertilize until I see a symptom of a deficiency. And I'll definitely be checking pH. Good luck though, there is a real good chance that you'll end up with prime quality stuff.