Grain Spawn Bags

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Zombie Mushrooms' 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.

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Grow mushrooms like a pro with Zombie Mushrooms’ top-notch grain spawn bags. Our substrate is the secret to great fungi results, whether you’re just starting out or have years of experience. Here’s what makes our grain spawn bags special:

Optimized Grain Formula - Our unique combo of rye, millet, and sorghum delivers just the right nutrients for fast mycelial spread. This means healthier cultures and bigger harvests every time.
Ideal Growth Setup - With moisture set between 45-55% and microporous polypropylene bags, our spawn keeps the perfect balance of hydration and air flow. This significantly cuts down contamination risks for your peace of mind.
Versatile and Consistent - Our bags work great for all kinds of mushrooms—think gourmet or even medicinal types. Plus, our careful process ensures you get the same solid results batch after batch.
User-Friendly Design - These come pre-sterilized and ready to go, with clear packaging so you can check progress easily. The self-healing injection ports make adding spores a breeze, no matter your skill level.
Eco-Conscious Choice - We use biodegradable materials and grains sourced close to home. Our efficient mix speeds up colonization and boosts yields, meaning less waste in your growing setup.