Pre-sifted organic peat moss. Gourmet Mushroom Supply peat moss comes pre-sifted of large sticks and clumps. Peat is commonly used as an ingredient in mushroom casings. A common casing recipe is: 10 parts peat, 10 parts
coarse vermiculite, 1 part
gypsum, 1/4 part
hydrated lime.
Sold in ½ gallon increments.
