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Fungi Akuafo Inc

Grain Spawn - Pearl Oyster (1kg) - Plastic Bag

Grain Spawn - Pearl Oyster (1kg) - Plastic Bag

Regular price $20.00 CAD
Regular price Sale price $20.00 CAD
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Beginner skillIndoor growingBucket or filter bag
  • Product may not ship for up to 4 weeks.
  • Mushrooms do not fruit from grain spawn.  Grain spawn needs to be added to a bulk substrate to fruit.

Species Profile

Pearl Oyster (Pleurotus ostreatus) is a reliable, easy to grow species that produces generous clusters of white to cream/tan mushrooms.

Pearl Oysters are very similar to Garden Oysters but slightly more delicate and often paler in colour.

They grow well at room temperature or slightly cooler (10oC to 18oC) and yield substantial first and second flushes. Pearl Oysters mushrooms are as beautiful to look at as they are to eat!


Our 1kg bags of grain spawn are grown using mycelium cultures in our lab. We use sterilized organic rye grain sourced from the Canadian prairies through Grainworks. We make your spawn to order.

We incubate your freshly made spawn between 2-4 weeks to ensure it is strong and healthy. We then ship via Canada Post or notify you for pickup.


Grain spawn must be mixed
with a bulk substrate to fruit mushrooms.

We recommend:

Beginner growers: Use oyster mushroom grain spawn to inoculate
pasteurized substrates such as straw, hardwood sawdust or coffee grounds in filter bags and small buckets (<1 gallon). At a 10% inoculation rate, 1 bag of grain spawn (1kg) will inoculate about 5 1-gallon buckets with pastuerized substrate.

Experienced growers: Use this spawn to inoculate sterilized nutrified sawdust in filter bags. At a 10% inoculation rate, 1 bag of grain spawn (1kg) will inoculate about 10 to 12 14A Unicorn filter bags of sterilized substrate.


If you are new to growing, we highly recommend you take a workshop or buy a book on mushroom cultivation.

Care information

If you do not plan to use your spawn immediately, store it in a clean, undisturbed corner of your fridge for up to 6 weeks.

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