Blue Oyster (Pleurotus ostreatus var. columbinus) is a cool-weather gourmet mushroom known for its bold blue caps and excellent adaptability. This strain thrives in the moderate-to-cool temperatures common to Sri Lanka’s upcountry regions, shaded outdoor setups, or air-conditioned indoor farms.
It’s a great option for growers looking to diversify production outside of peak heat periods—offering fast colonisation, high biological efficiency, and an attractive, market-ready appearance.
What You’ll Receive
- 1 × 100 mm sterile agar plate, fully colonised with sector-free Blue Oyster mycelium
- Strain ID and pour date for traceability
- Contamination-free and sealed fresh—best used within 4 weeks (store at 2–5 °C)
Recommended Growing Conditions
- Colonisation: 18–24 °C, low light, 60–70% humidity
- Fruiting: 12–18 °C, 85–95% humidity, fresh air exchange, 700–1 000 lux light
- Substrates: Pasteurised straw, supplemented sawdust, coconut fibre, or rice bran-based mixes
Why Grow Blue Oyster?
- Vibrant blue colour intensifies in cooler temperatures—great shelf appeal
- Quick to colonise grain and substrate bags (7–10 days on average)
- Performs well in shaded outdoor systems and passive-cooled indoor farms
- Excellent yield potential with multiple flushes
Use Cases
- Start grain spawn for bag or block cultivation
- Ideal for upcountry growers or those using cool rooms and tunnels
- Maintain in culture libraries for breeding or ongoing production
- Demonstrate temperature-responsive fruiting in mushroom workshops
This culture is ideal for Sri Lankan growers looking for a cold-adapted strain that combines fast performance, reliable fruiting, and strong visual appeal. Whether you’re supplying restaurants, retailers, or research programs, Blue Oyster delivers consistent results and premium quality.







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