Just because certain soils COST more doesn't mean they are better. lol That is one of the funniest things I keep hearing. "Fox Farm this, Black Gold that", it's all a bunch of nonsense. If plants can grow, and grow great in regular outdoor soil then why can't they grow great in MG? The kind of soil doesn't really have much to do with it in the first place. If it did, then plants wouldn't be able to grow in just water. All the soil does for a plant is provide support and acts as a carrier for nutrients, that's it, nothing more nothing less, botany 101. Again, if soil played that big of a role then why can so many plants grow in so many different types of soils and have success. To say that you can't get as good results with MG as you can with FF or any other brand of soil is plain ignorant. As long as you give the plant the proper amounts of nutrients it needs to stay alive and give it an adequate growing environment then you can still have great results.
Weed plants can and do survive in just about every type of environment except extreme cold environments. They say the origins of Marijuana is the Hindu Kush region, and if I'm not mistaken that is a mountainous region, that is higher up in elevation, which again means it has low humidity. There is also alot of speculation that when weed is grown in lower humidity environments it produces more resin to help coat the leaves and protect it from drying out. Hmmmmm...just food for thought.