I read a recipe I want to try:
7 parts perlite
6 parts vermiculite
5 parts earthworm castings (I will substitute composted cow manure)
1 part guano/azomite/greensand/rock dust.
Perlite hold air, vermiculite holds water (so does peat or coir), the castings/manure are organic matter, and the final element is minerals/micros. My cow manure is dug up from a field and is very active with microscopic life, so I don't think I need mycos. The plants will also get treated with an aerated compost tea made from the manure.
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