Potting soil recipe for succulents and cactus 3 gallons sphagnum peat moss or coir fiber 1 gallon perlite 1 gallon vermiculite 2 gallons coarse sand 2 TBSP lime (if using peat moss) Potting soil recipe for seed starting 2 gallons sphagnum peat moss or coir fiber 2 gallons vermiculite 1 gallon...