Dusk Blue Oyster — Blue Oyster Mushroom Spawn
Pleurotus ostreatus
Fast colonizer with reliable yields — the commercial workhorse for Canadian growers. Dusk Blue Oyster delivers aggressive mycelial growth, cold tolerance that suits our climate, and the kind of flush-after-flush dependability that keeps your operation profitable week after week.
Growing Specifications
| Colonization Time | 10–14 days |
| Colonization Temperature | 20–24°C |
| Fruiting Temperature | 10–21°C (cold tolerant — perfect for Canada) |
| Relative Humidity | 85–95% |
| Preferred Substrate | Straw, hardwood sawdust, coffee grounds, soy hulls |
| Expected Yield (1st flush) | 200–300g per 2.3kg block |
| Difficulty Level | Beginner-friendly |
Commercial Value
Oyster mushrooms sell for –10 per pound and represent the highest-volume gourmet mushroom category in Canada. Blue oysters are a staple at farmers’ markets, grocery stores, and restaurant suppliers. The low production cost and fast turnaround mean strong margins even at wholesale pricing. For new farms, this is the strain that pays the bills while you scale.
Why Growers Choose Dusk Blue Oyster
- Fastest colonizer in our catalogue — from inoculation to first harvest in under 4 weeks
- Cold tolerant down to 10°C, reducing heating costs in Canadian facilities
- Grows on a wide range of affordable substrates including straw and coffee grounds
- Beginner-friendly with forgiving environmental requirements — ideal for new operations
Available Formats
- Grain Spawn — Ready-to-use rye and millet spawn for direct inoculation
- Liquid Culture — Clean, vigorous cultures for labs and large-scale inoculation
- Culture Slant — Long-term genetic storage for maintaining your strain library
Growing Tips
Blue oysters fruit aggressively and need strong fresh air exchange to develop compact, well-formed clusters. In Canadian winters, this strain excels in unheated or minimally heated spaces — fruiting temperatures as low as 10°C produce dense, deeply colored caps with excellent shelf life. Pasteurized straw is the most cost-effective substrate for high-volume production. Harvest when cap edges are still slightly curled for the best texture and longest retail shelf life.
Ready to Grow Blue Oyster?
Request a quote for Dusk Blue Oyster spawn. We produce to order in our Canadian facility and ship fast across the country. Lead time: 15–20 business days.