Beginner Cultivation
Black Pearl Oyster

Strain Profile

Of Japanese origin, this variety is a hybrid of European and Asian P. ostreatus varieties.

Featuring large meaty stems and caps, this mushroom is commonly known as Black Pearl King Oyster, for it’s resemblance to the King Oyster (P. Eryngii).  This mushroom is less demanding to grow however than the Eryngii King Oyster.  

Immature fruits resemble P. eryngii, with thick stems and small caps.  As they mature, the caps enlarge and begin to more closely resemble the classic P. ostreatus morphology.

Growing on supplemented hardwood sawdust is standard practice, either supplemented with wheat bran, or on the ‘Master’s Mix’.


This strain fruits from 10-20˚c.  

Preferred agar culture media:  MEA, PDYA

Preferred substrate:  Hardwood Logs, Supplemented Sawdust. Particularly favours Oak.

Also Known As: 

  • Black Pearl Oyster

Growing Parameters

Spawn Run

Temperature: 18-25°c
Relative Humidity: 90-95%
Duration: 12-24 days
CO2: >5,000 ppm
Fresh Air Exchanges: 0-1 per hour
Light Requirements: n/a

Primordia Formation

Temperature: 10-18°c
Relative Humidity: 95-100%
Duration: 4-5 days
CO2: <1000 ppm
Fresh Air Exchanges: 4-8 per hour
Light Requirements: 500-1000 lux


Temperature: 10-20°c
Relative Humidity: 80-95%
Duration: 4-8 days
C02: <2000 ppm
Fresh Air Exchanges: 4-8 per hour
Light Requirements: 500-1000 lux

Pre-Poured Agar Plates

MEA, MYA, PDA, PDYA, Activated Carbon
In a range of colours!
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