Sawdust and / or Wood chips
Hardwood sawdust is, in addition to the mixture of coconut coir, vermiculite, bran/soy hulls, a very popular substrate for mushroom cultivation. It is easily available and also very cheap. However, sawdust alone is not widely used as a substrate.
It is often mixed with wood chips which improves the structure and colonization speed of the mushroom spores and the mycelium. It is important to know that not every type of sawdust is suitable for growing Magic Mushrooms. Soft woods, for example, are not at all suitable as a substrate for growing mushrooms. Choose wisely and therefore for the option of hardwood, such as maple or oak.