King Blue Oyster Grain Spawn – 1kg

About King Blue Oyster

King Blue Oyster is a vigorous hybrid combining the speed of Blue Oyster with the substantial fruiting bodies and texture associated with King Oyster. Our 1kg grain spawn is fully colonised and ready to use, with a choice of Organic Rye or Sorghum.

Developed by Mossy Creek Mushrooms, this strain brings together fast colonisation, strong yields and excellent fruit quality — making it a superb choice for both home and small-scale commercial growers.

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Key Features

• Fast colonisation – aggressive, reliable growth
• Thicker stems & improved texture – king oyster influence
• Cold-tolerant fruiting – performs well in cooler conditions
• Dense, market-ready clusters
• High yields with consistent flushes

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Choose Your Grain

Organic Rye
Our premium grain option. Organic rye offers excellent moisture retention and nutrient availability, providing plenty of inoculation points for fast, vigorous colonisation.

Sorghum
A clean, reliable grain option. Its smaller kernels provide excellent distribution through bulk substrate and plenty of inoculation points for even colonisation.

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Product Details

• Species: King Blue Oyster (Pleurotus hybrid)
• Parent genetics: King Oyster × Blue Oyster
• Weight: 1kg
• Grain Options: Organic Rye or Sorghum
• Supplied: Fully colonised and ready to use
• Suitable for: Straw, hardwood sawdust, supplemented substrates

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Ideal For

• Home growers and beginners
• Small-scale and commercial mushroom growers
• Growers seeking high-yield oyster strains
• Indoor and controlled growing environments

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Why Twisted Stem Spawn?

Our grain spawn is produced in small batches under carefully controlled sterile conditions. Each batch is grown and checked by us before it leaves Twisted Stem, giving you clean, vigorous mycelium that’s ready to get to work.