Portobello Mushroom Grain Spawn (1 pound)

✨ Premium Spawn

• Pure Genetics: 100% contamination-free mushroom grain spawn guaranteed
• Extended Viability: 30 days at room temperature, 1 year when refrigerated (recommended)
• Ready-to-use fully colonized rye berries, 100% certified organic
• Professional Grade: Developed for both commercial and home cultivation, bulk orders welcome

📦 Package Includes

• 1 lb. Portobello Mushroom Grain Spawn Bag
• Complete transfer instructions
• Contamination-free guarantee

🔬 Quality Assurance

Our mushroom grain spawn bags undergo rigorous quality control:

• Produced in laminar flow hood
• From low generation agar sample
• Triple contamination inspection
• Regular testing for viability
• High-output sub-strain selection

💡Grain Spawn Storage

• Store refrigerated for optimal shelf life unless cold sensitive
• Never freeze or store above 90F (32C)
• Viable for 1 year when refrigerated
• Let reach room temperature before use

🫱 Using Grain Spawn

• Break up well before use
• Use aseptic technique when transferring to bulk substrate
• how to use mushroom grain spawn bags full guide

🛡️ Our Promise

Backed by our 90-day guarantee - if you experience any issues or are unsatisfied for any reason, we'll replace your mushroom grain spawn bag free of charge.