Mushroom Substrate

Mushroom Substrate From Out Grow

Below you can find our mushroom substrate collection for the fruiting stage of cultivation. All mushroom substrates arrive fully hydrated, sterilized or pasteurized and ready for immediate inoculation.

Manure-Based Mushroom Substrates

Cow manure mushroom substrate, horse manure and straw mushroom substrate blends, and manure-based mushroom substrate formulations in 1lb and 5lb bags.

Wood-Based Mushroom Substrates

Supplemented hardwood sawdust mushroom substrates in 5lb bags for wood-decay species.

Pasteurized Straw Mushroom Substrate

Pasteurized wheat straw mushroom substrate in 5lb quantities for fast-colonizing species.

Mushroom Substrate Casing Mix

Pasteurized casing layer mushroom substrate for species requiring nutrient-poor top layers during fruiting.

Browse our complete mushroom substrate collection below.