King Blue Oyster | Grain Spawn (Millet)

Pleurotus ostreatus var. sapidus

Fast, aggressive and highly vigorous King Blue Oyster grain spawn, produced on millet for rapid colonisation and strong yields. Suitable for commercial growers, hobby cultivation and outdoor beds.

Renowned for producing large, dense blue-grey clusters with excellent texture and flavour.

Common Name: King Blue Oyster / Pearl Giant Oyster
Species: Pleurotus ostreatus sapidus

Growing Parameters

Incubation Temperature: 24–27°C
Fruiting Temperature: 20–30°C
Humidity: 85%+
CO₂: Fresh air loving species, low CO₂ preferred
Fruiting Orientation: Side fruiting recommended

Recommended Substrates

Preferred: Master’s Mix

Also performs well on:

• Hardwood sawdust + bran supplements
• Plain sawdust
• Straw (wheat, oat, sugarcane mulch)
• Coco coir blends
• Shredded corn cobs
• Cardboard

Storage

Store refrigerated at 2–4°C. Do not freeze.

Best used fresh for peak vigour.

Difficulty: Easy

✔ Fast coloniser
✔ Reliable fruiter
✔ Heavy yielding strain
✔ Suitable for beginners and commercial growers

Freshly produced in small batches. Limited stock as it moves quickly.