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Soil and Soilless

~shabang~'s worm casting method

The mix that I recommend is basically nothing but castings and drainage.

I used to cut it with all sorts of things, including soilless peat-based mixes like pro-mix.. but then you're introducing a source for pH problems-- especially when others try and duplicate it but can't find the right brands then substitute with a peat-mix that is too acidic.

So down to the bare basics of a mix:

40% castings
30% perlite
30% vermiculite