Mushroom Substrates

Mushroom Substrate for Sale

Out-Grow stocks and sells mushroom substrates in multiple formats for different cultivation methods and species requirements. Our mushroom substrates includes sterilized grain substrates, wood-based substrates, manure-based substrates, and specialty substrate blends. All mushroom substrates arrive fully prepared, sterilized or pasteurized, and ready for immediate inoculation.

Grain Spawn Mushroom Substrates

Sterilized grain substrates serve as spawn production and inoculation media for mushroom cultivation. Our grain substrate collection includes rye berry, popcorn, milo, millet, and blended grain formulations packaged in jars and filter bags. Grain substrates provide high surface area for mycelial colonization and work across most cultivated species.

Wood Based Mushroom Substrates

Wood-based mushroom substrates support cultivation of wood-decay species including oyster mushrooms, shiitake, lions mane, and reishi. Our wood substrate formulations combine hardwood sawdust with nutritional supplements, sterilized and packaged in filtered grow bags for bulk substrate inoculation.

Manure Based Mushroom Substrates

Manure-based mushroom substrates serve dung-loving species and high-nutrition cultivation applications. Our manure substrate blends are composted, sterilized, and packaged ready for inoculation in commercial-grade grow bags.

Mushroom Substrate Ingredients

Individual mushroom substrate components for custom formulation and substrate adjustment. Our substrate ingredient collection includes coconut coir, vermiculite, gypsum, straw, hardwood pellets, and specialty additives sold by bag or pound for growers building custom substrate recipes.

All In One Grow Bags

All in one mushroom substrates combine sterilized grain and bulk substrate layers in single contained units. These complete mushroom substrate systems include both spawn and fruiting layers, eliminating the need for separate grain colonization and substrate transfer steps. All-in-one grow bags are ready for direct inoculation and complete cultivation cycles.

Browse our complete mushroom substrate collection organized by substrate type and application below.