growbag soil help!?

I am growing out side in grow bags and am wondering what growing mediums I should mix for in the bags? Please help

I use 1/3 perlite, 1/3 peat moss ( both non miracle grow) and 1/3 mushroom compost I add 1 tablespoon of dolomie lime per gallon of mix.

I am thinking about using superthrive throughout the grow, when ever I get a chance to go out there. Any other ferts or nutes recommended?

I used PROMIX, and i also used Miracle Grow Organic and Miracle grow potting soil(i ran outa money lol). And out of all the plants the ones in PROMIX are doing amazing, there is new growth exploding out every nook and craney. Dont skimp on the soil... And i am using growbags. I couldnt find bags, but i got 4X4 sheets and zip tied them together.