So I take it for only one plant, I will only need 1 cubic feet of soil which translates into this amount of ingredients needed for the super soil:
Worm castings 2.08 to 4.17 pounds
Steamed bone meal 7 ounces
bloom bat guano 7 ounces
blood meal 7 ounces
rock phosphate 4 ounces
Epson salt 1.00...