Slate Black Pearl King Oyster — King Oyster Mushroom Spawn
Pleurotus eryngii
Dark elegance with bold, meaty texture. Premium positioning for discerning buyers. Slate Black Pearl King Oyster produces thick, dense stems and dark caps that stand apart from standard king oyster strains — commanding top dollar from restaurants and specialty retailers across Canada.
Growing Specifications
| Colonization Time | 14–21 days |
| Colonization Temperature | 21–24°C |
| Fruiting Temperature | 12–16°C |
| Relative Humidity | 80–90% |
| Preferred Substrate | Supplemented hardwood sawdust (masters mix ideal) |
| Expected Yield (1st flush) | 200–300g per 2.3kg block |
| Difficulty Level | Advanced (requires CO2 management) |
Commercial Value
King oyster mushrooms sell for –15 per pound in the Canadian market, with the meaty texture making them a restaurant favorite for plant-based and fine dining menus. Demand continues to grow as chefs discover king oyster as a steak substitute that sears, grills, and roasts beautifully. The thick stems mean excellent yield by weight and a longer shelf life than most gourmet species. Slate Black Pearl’s distinctive dark caps add a premium visual element that justifies top-tier pricing.
Why Growers Choose Slate Black Pearl King Oyster
- Distinctive dark caps and thick stems set this strain apart from generic king oyster varieties
- Excellent yield-to-weight ratio — dense, heavy mushrooms mean more revenue per block
- Long shelf life of 10–14 days refrigerated, reducing waste and spoilage losses
- Growing demand from plant-based restaurants and fine dining establishments
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
King oyster is the most technically demanding species in our catalogue but rewards skilled growers with premium returns. CO2 management is critical — elevated CO2 during early development encourages thick stem growth, while increased fresh air exchange during cap formation produces the signature dark, flared caps. Masters mix (50/50 hardwood sawdust and soy hulls) is the ideal substrate. Keep fruiting temperatures tight at 12–16°C for the best morphology and densest fruit bodies.
Ready to Grow King Oyster?
Request a quote for Slate Black Pearl King Oyster spawn. We produce to order in our Canadian facility and ship fast across the country. Lead time: 15–20 business days.