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How to grow mushrooms indoors
Decide what type of mushroom you want to grow.
The three types of mushrooms that are easiest to grow at home are oyster, white button, and shiitake. The method for growing each mushroom is similar, but the ideal growing substrate differs.
Oyster mushrooms grow best in straw or coffee grounds (described later); shiitakes grow best on hardwood sawdust; button mushrooms grow best in composted manure. These different substrates reflect the different nutritional needs of each species; however, each of these three species can be grown readily enough in sawdust or straw.