I have seen people have success with this mixture:
1/3 Sunshine #4
1/3 MJR potting soil
1/3 Perlite

Specifically in containers. The plants i saw were the picture of health. What da ya'll think of that mixture?

I am using Aurora Innovations Roots Organic 707 20L grow bags. I planted right into the bags with no added anything. The plants seem to be taking to it. It was 21.95 a bag at my local hydroshop.
Actually i topdressed them with .5 Cuft of ffof. Basically just to cover the feeder roots on top