I'm sure mg nutes do work just fine on pot after all it is a weed, but at the same time you don't have to buy high priced nutes. The fox farm regular lineup is not that expensive u can get all three parts for around 60 maybe cheaper depending where you go, and that's 3 diff nutes that I'm sure will have better results then mg products. I personally wouldn't waste my time or effort if I was growing weed using a cheaper product, I would buy the whole fox farm lineup andthe advanced nutrients which are more expensive for the set but you'll be happier in the end. It's like buying some subs for your car, if you go cheap and get the shitty ones your not gonna be satisfied with it in a couple months you'll wish you spent the money on the nicer quality ones.