Casinglayer
De casing layer is a cover of humid material to apply over the colonized substrate. Although most mushrooms will also grow without a casing layer, it's wise to use one.
The casing layer keeps the substrate from drying, stimulates the forming of primordia and works as a water reservoir for the adult mushrooms.
There are many different recipes for casing layers. A good casing layer has an open and porous structure, keeps the water in and has the right pH.
