Description

Sterilized Rye Berry Grain Spawn Bag – 3lb for Mushroom Cultivation

Out-Grow’s Sterilized Rye Berry Grain Spawn Bag is a professional-quality mushroom substrate prepared for fast colonization, strong mycelial growth, and consistent results. With 3 pounds of fully hydrated and sterilized rye berries, this grain spawn bag offers a clean and nutrient-rich environment trusted by cultivators across the country.

Mushroom Grain Spawn Bag with Injection Port and Filter Patch

This 3lb grain spawn bag includes a self-healing injection port for sterile inoculation using liquid culture or spore syringes. A 5-micron filter patch allows for optimal gas exchange while maintaining a sealed, contamination-resistant environment. Together, these features create ideal conditions for reliable mycelium colonization and vigorous mushroom development.

Lab-Prepared Sterilized Rye Grain Spawn for Professional Results

Each rye berry grain spawn bag is produced in our commercial mycology laboratory using industry-standard sterilization at 15 PSI. We use high-quality rye berries, carefully hydrated and sterilized in small batches to ensure consistent performance. Rye is a time-tested grain for mushroom cultivation, favored for its structure, moisture retention, and high nutrient content — making it ideal for growing a wide variety of gourmet and medicinal species.

Trusted 3lb Grain Spawn Substrate for Serious Mushroom Growers

This 3lb sterilized rye grain spawn bag provides approximately 3 quarts of substrate and is suitable for inoculating up to 15 pounds of bulk substrate. Whether you're a beginner looking for a reliable starting point or a professional scaling up production, Out-Grow’s rye berry spawn bags are engineered to deliver the clean, high-yield performance your grow deserves.

Order today and discover why Out-Grow has been a trusted source for sterilized mushroom grain spawn bags since 2010.