Sterile Grain Jars

Premium Sterilized Grain Mix

Each 32 oz jar contains 1 lb of fully hydrated milo, infused with oyster shells and gypsum. This nutrient-rich blend is ideal for ensuring rapid mycelial growth and robust mushroom development, giving your grow an advantage.

Advanced Sterilization & Hydration

Every jar undergoes industrial-level sterilization in autoclaves, guaranteeing a clean, contaminant-free substrate. Pre-sterilized for immediate use, the grain jars are perfect for inoculation with spores or liquid culture.

Self-Healing Injection Port & 0.2-Micron Filter

Designed with a built-in injection port and 0.2-micron filter, our jars allow for easy, contamination-free inoculation. Simply inject your spores or liquid culture through the port for a hassle-free growing experience.

Versatility for Gourmet & Medicinal Mushrooms

Whether you’re cultivating gourmet mushrooms like oyster and shiitake or growing medicinal varieties, these jars support rapid and consistent mycelial growth, making them adaptable for various mushroom types.

Secure & Durable Packaging

Each 32 oz glass jar is durable and fitted with a metal lid to ensure longevity. Packed in bubble wrap for secure shipping and safe storage, these jars can be stored for months at room temperature without refrigeration.