There are various packaged soils one can purchase from grow supply stores, but we like Pro Organics. We use it as a soil base or for transplanting. I use it for my vegetable and herb transplants as well. We came upon a soil recipe that a breeder named SubCool uses. We vary it sometimes, substituting dried comfrey leaf for the kelp meal for example. But following is the recipe we typically use.

  • 33lbs wormcastings (I get mine from the three worm farms I have in my kitchen)
  • 5 lbs blood meal
  • 5 lbs bat guano
  • 2.5 lbs fish bone meal
  • 2.5 lbs bonemeal
  • 3 cups kelp meal or dried comfrey leaf (I have a ton of comfrey growing so I harvest it for tea and super soil)
  • 3 cups oyster shell
  • 3 cups alfalfa meal
  • 2 cups azomite
  • 1 cup dolomite lime
  • 3/4 cup epsom salts
  • 2 T humic acid

super soil in compost turnersuper soil in turnerWe mix all of this together with three 2 cu ft bags of Pro Organics soil (6 cubic ft of soil) using a spinnable compost turner. If using another brand of soil, pay attention to the size because some come in 1.5 cu ft bags as well as 3 cu ft bags. If I remember correctly, this represents half the original recipe. We store the finished soil in a garbage can.