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Mycelium 5 lb Rye Berries Grain Spawn for Mushroom Cultivation | Pre-Sterilized with Self-Healing Injection Port – Ready to Inject | Ideal for Fast Mycelium Growth & High-Yields | Made in USA

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About this item

  • Generous 5LB Grain Bag: Each bag contains 5 pounds of premium organic grain—offering up to 60% more spawn capacity than standard 3LB options. Produce more mycelium per batch and increase your overall yield potential.
  • Easy to Use for All Growers: Perfect for beginners and hobbyists, this pre-sterilized grain spawn simplifies the growing process. Just inject with liquid culture and incubate—no pressure cooker or prep required.
  • Lab-Grade Sterility You Can Trust: Each bag is autoclave-sterilized in our ISO 7 cleanroom, vacuum-sealed, and outfitted with a 0.2 micron filter patch to maintain airflow while blocking contaminants.
  • Versatile for Monotubs & Grow Bags: Designed for use in monotubs and grow bags for efficient fruiting and consistent yields. Pair with hardwood substrates like oak and soy, or dung-loving blends like CVG, to grow vibrant, flavorful mushrooms.
  • Responsibly Made in the USA: Crafted with organic, non-GMO grains sourced from family-owned farms in the USA. We prioritize responsible sourcing and eco-conscious practices in every step of production.


Product Description

Sterile grain for mushroom cultivation, millet, milo, rye berries, whole oats

Inoculation Made Easy


Quickly master inoculation using a liquid culture syringe. Simply sterilize the injection port, inject your culture, and let nature do the rest.

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Merchant Video
Mycelium Sterile Grain Bag for Mushroom Cultivation, gourmet mushrooms at home
Mycelium sterile grain bags for mushroom cultivation
Mycelium sterile grain bags for mushroom cultivation