Sterilized 3lb grain bag With Injection Port

Premium Mushroom Grain Spawn for Rapid Mycelium Expansion

Unlock faster colonization and higher yields with our professional-grade mushroom grain spawn. Whether you are a hobbyist using mason jars or a commercial grower scaling up, our grain spawn provides a nutrient-dense foundation for wood-loving and manure-based mushroom species.

Sterilized & Contamination-Free: Every batch is pressure-sterilized at 15 PSI to ensure a clean start for your cultures.

Optimal Hydration: Our grains are prepared with a "dry exterior, saturated interior" to prevent clumping and bacterial rot.

Maximum Inoculation Points: Choose smaller grains like sorghum (milo) to create thousands of leap-off points and maximum nutrient density.

Ready-to-Inoculate: Designed for use with liquid culture or agar transfers, our spawn is the bridge between a laboratory culture and a successful harvest.

Shop our collection of milo grain spawn to jumpstart your next grow.

Key Features & Benefits

Fast Colonization: Individual grain kernels provide thousands of "inoculation points" when mixed into a substrate, leading to much faster growth than other spawn types.

Nutrient-Dense: Grains are packed with carbohydrates and proteins that give the mycelium a "nutrient kick," essential for high-volume yields in indoor cultivation.

Highly Scalable: A small amount of "master" grain spawn (G1) can be used to inoculate much larger quantities of secondary grain (G2), significantly reducing long-term costs.

Easy Distribution: Unlike solid "cakes," loose grain can be shaken and broken apart easily, ensuring an even distribution of mycelium throughout your grow bags or containers.