Blue Oyster (Pleurotus Ostreatus) Grain Spawn
Blue Oyster (Pleurotus Ostreatus) Grain Spawn
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Blue Oyster Mushroom
Scientific Name: Pleurotus ostreatus var. columbinus
Blue Oyster mushrooms thrive in cool temperatures (55-65°F), colonizing substrates in 10-14 days. Ideal fruiting at 55-65°F and 85-95% humidity. Known for rapid colonization, mild savory flavor, and robust flushes within 2-3 weeks post-colonization.
About Our Grain Spawn: Built on the same Unicorn 4T-INJ bag platform as our sterilized grain, this spawn is inoculated to order with low-passage, agar-verified culture for clean, vigorous growth. Because it’s freshly inoculated, the bag will arrive partially colonized—or colonization may become visible within a few days, depending on species and shipping conditions. Hydration and gas exchange are tuned for fast, even colonization.
Storage & Handling: Keep in a cool, dark place during and after colonization. Once the bag reaches ~25% colonization, perform a gentle break & shake to redistribute mycelium and speed completion. Avoid opening until fully colonized and ready to expand into your substrate.
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Preparation
3lb Grain Spawn Bags are made from industry standard Unicorn bags locally sourced and prepared Organic Whole Oat Grain Spawn and Inoculated to order.
Grains are prepared with gypsum powder and soaked, boiled, packaged, sterilized and heat sealed.
Upon order, spawn is inoculated with 4ml of your chosen varity.
Spawn can be used to inoculate substrate or create second generation spawn bags.
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What to Expect
Colonization rates upon receipt will vary based on variety, transit time and temperature.
Grains are Inoculated to order, so in most cases you will see visible mycelial growth upon receipt, but it's possible this will not occur until a couple days after.