Sterilized Grain Spawn Bag - Whole Oats 3 lb

Sterilized Grain Spawn — Ready for Inoculation

Skip the pressure cooker and start growing faster. Our pre-sterilized grain spawn bags are sealed under clean conditions and equipped with a self-healing injection port, so you can go from syringe to colonized grain without ever opening the bag. Less handling means less contamination risk — and less wasted time. The 5 lb size is perfect for larger projects or splitting across multiple tubs — more grain, more spawn, bigger yields.

Specifications

• Grain: Whole oats
• Weight: 5 lb
• Filter: 0.5 micron filter patch for gas exchange
• Injection port: Self-healing silicone injection port

How to Use

• Sanitize the injection port and your syringe needle with alcohol.
• Inject liquid culture through the self-healing port.
• Incubate at species-appropriate temperature until fully colonized (2-4 weeks).
• Use colonized grain to inoculate bulk substrate or fruit directly.

Storage

Store at room temperature (65-75°F) in a clean, dry place. Use within 30 days of receipt for best results. Do not refrigerate. Inspect bag for punctures or contamination before use.

Quality & COA

Each bag is pressure-cooker sterilized and sealed under clean conditions. Representative bags are tested for contamination before release.

How to Use This Spawn Bag

1. Sterilize the injection port with an alcohol prep pad.
2. Inject liquid culture (1-2cc) through the self-healing injection port.
3. Mix gently by massaging the bag to distribute the culture evenly through the grain.
4. Incubate at 70-75°F in a clean, dark space.
5. Wait for colonization — white mycelium will spread through the oats over 2-4 weeks.

Next Steps: Once the grain is fully colonized, use it to inoculate a bulk substrate at a 1:3 ratio (spawn to substrate).

What's in the Box

• 1x sterilized grain spawn bag (whole oats, 3lb or 5lb)
• Self-healing injection port
• Filter patch for gas exchange