Sorry about the delay bud. Been busy here. Home depot use to sell pro-mix in the bale. Nothing smaller, but it was less than 20$, they also sell granular fertilizer you mix with your soil MADE BY EPSOMA, Organic,small 2lb. - 5lb. bags.There are 3-4 different types, very good stuff..I used the Tomato formula for flower and the one with myco. mixed in it for veg.. Walmart sells worm castings,and i think dolomite lime.
3 parts
Promix
1 part worm castings
1 part perlite
For every gallon of finished soil mix I add 2 tablespoons of DOLOMITE LIME<<< very important.
I cant recall how much Epsoma product I mixed in yet.(check the bag and use less)
Water down real good and try to let it sit for a week or 2 stirring every few days.
-RB-