Spawn Bags

Treeman Grain Spawn is grown on organic rye inoculated with mushroom mycelium, which is ideal for sterilized or pasteurized substrates. Grain spawn is also the industry standard for high volume commercial production. We ship our grain spawn when it has achieved approximately 80% colonization and recommend using within one month of receiving it. Most species must be refrigerated to prolong use.

Our 4 lb. spawn bags can inoculate 80-100 lbs. of pasteurized straw substrate or 100-125 lbs. of sterilized sawdust substrate. The greater percentage of spawn to substrate, the faster colonization will occur.

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