Grain Spawn Bags

Premium 3lb Grain Spawn Bags are designed to provide optimal nutrient and moisture content for expanding Mushroom Spawn. Our Grain Bags come with an injection port and breathable filter patch for your ease of use. Each Zombie Mushroom Grain Spawn Bag is sterilized in an industrial autoclave and sealed behind a Hepa Flow Hood to ensure superior performance. These Sterile Grain Bags are crafted for those who want exception results and big yields. These Grain Spawn Bags are commonly combined with Substrate Bags after the grain bag is 100% fully colonized.