>>2164693I'm unsure what you mean by soil mixes, but if you mean to just make your own, go for it.
I'm actually experimenting with using charcoal instead of peat moss. Incorporating it into an active compost, as the logical conclusion to the "biochar" amendment.
To that, I'm just adding some of the fill from my backyard for drainage. I'm unsure of the proportions, but worst case I use it to overwinter a pepper, instead of revitalizing the houseplant one.