Description
Buy Blue Oyster Grain Spawn Online – Pleurotus ostreatus var. columbinus
Looking for high-quality blue oyster mushroom spawn with verified genetics? MycoSource blue oyster grain spawn is professionally prepared on organic milo grain and backed by documented biological efficiency data – something most suppliers can’t offer.
WHY GROWERS CHOOSE OUR BLUE OYSTER SPAWN:
• Documented genetics with recorded colonization times and yield data
• Made fresh to order – never sitting on shelves for months
• Clean, vigorous mycelium with fast colonization rates
• Grown with careful attention to sterile technique
ABOUT BLUE OYSTER MUSHROOMS:
Fast colonizer, wide temp range. Most forgiving oyster variety. Pleurotus ostreatus var. columbinus is one of the most beginner-friendly gourmet mushrooms to cultivate.
HOW TO USE BLUE OYSTER GRAIN SPAWN:
Inoculate your bulk substrate at a 10-20% spawn rate for optimal colonization speed. This blue oyster spawn fruits well on Masters Mix, supplemented hardwood sawdust, or pasteurized straw. Expect full colonization in 14-21 days at 70-75°F, followed by pinning within 7-14 days of fruiting conditions.
SPAWN RATES:
• 1 lb bag: Inoculates 5-10 lbs of substrate (small batch)
• 2 lb bag: Inoculates 10-20 lbs of substrate (best value for home growers)
• 5 lb bag: Inoculates 25-50 lbs of substrate (commercial quantity)
Ships fast with insulated packaging. Store refrigerated (35-45°F) for up to 3 months, or use immediately for best results. Questions? We offer free cultivation support with every order.

















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