Ready-to-Inoculate Professional Mushroom Grain Spawn 1 kg Sterilized Sorghum Grain Spawn with Self-Healing Injection Port (SHIP) and 0.2 µm Filter Patch

Our 1 kg Sterilized Sorghum Grain Spawn is engineered for reliable, contamination-resistant mushroom cultivation. Each bag contains premium red sorghum (Milo), optimally hydrated to 45% moisture content using our unique Steep-Not-Cook process.

Unlike traditional boiled grain, the Steep-Not-Cook method minimizes burst grains and produces clean, free-flowing spawn that is easy to break up and colonize.

The integrated Self-Healing Injection Port (SHIP) allows quick, sterile inoculation using Bundu Castellani Living Inoculant (LI) or conventional Liquid Culture (LC), making it the ideal companion to our Mushroom Spawn Kits.

🛡️ The STS Sterility Standard

Every bag is produced to our Sustainability Testing Station (STS) quality standard.

• Integrated SHIP – Sterile syringe inoculation without opening the bag.
• Professional Pressure Sterilization – Sterilized at 120 kPa (17.5 PSI) for 90 minutes to achieve complete thermal penetration.
• Autoclave Indicator Tape – Every bag includes Type 1 indicator tape, providing visible confirmation that the sterilization cycle was completed.
• 0.2 µm PTFE Filter Patch – High-efficiency sterile gas exchange while preventing airborne contaminants.
• High-Integrity Seal – Self-sealed during cooling and permanently heat-sealed before quarantine.
• 7-Day STS Quarantine – Every production batch is incubated for seven days before dispatch to verify sterility.

🛠 Technical Specifications

• Grain: Premium Red Sorghum (Milo)
• Net Weight: 1 kg hydrated grain
• Moisture Content: 43–45%
• Buffer: Calcium Carbonate for improved pH stability and grain separation
• Bag: 10x8x50cm, 60 micron, Heavy-duty gusseted polypropylene grow bag
• Filter: 0.2 µm PTFE
• Injection Port: Self-Healing Injection Port (SHIP)

Recommended Inoculation

• Living Inoculant (LI): 5 ml via SHIP
• Liquid Culture (LC): 5 ml via SHIP
• Agar: 3–4 wedges (corner-cut method)
• Grain-to-Grain: Approximately one tablespoon of fully colonized grain

Storage

Store in a cool, dry place away from direct sunlight. For best results, inoculate within 30 days of manufacture.

Perfect for Mushroom Spawn Kits

This product is the consumable component of our Mushroom Spawn Kit system.

Once you’ve purchased a Bundu Castellani™ Living Inoculant, simply order additional Sterilized Sorghum Grain Spawn bags whenever you wish to produce more mushroom spawn—no pressure cooker, grain preparation or filter modifications required.

Professional sterility. Professional results. Ready when you are.