Black King Oyster Grain Spawn – High Performance (1.7 kg / 3L)

Product detailed description

This professional-grade spawn contains vigorous Pleurotus ostreatus mycelium grown on sterilized grain. It’s perfect for use in hardwood-based substrates for commercial or home growing.

✅ High BE (biological efficiency) when used with enriched sawdust
✅ Perfect for vertical fruiting blocks or horizontal bag grows
✅ Lab-tested and contaminant-free

Recommended Substrate Mix:

• 80% hardwood sawdust

• 10–20% bran (or wheat middlings)

• Optional: 1–2% gypsum or calcium carbonate

• Moisture: 60–65%

• Must be sterilized for best results

Spawn Rate:

• 1:10 standard

• 1:5 for fast colonization

Colonization Conditions:

• Temperature: 22–24°C

• Time: 14–18 days (fast grower!)

• Light: Not required

• Humidity: 60–70%

• Allow 3–5 days for consolidation after full colonization

Tips for Best Results:

• Black King Oyster doesn’t like high CO₂ – use fans or vents

• Mix spawn evenly into substrate to avoid clumps

Storage: Keep refrigerated (2–4°C), best used within 6 weeks