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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 |