Black Pearl King Oyster Grain Spawn (Pleurotus Hybrid) | Little Acre

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Black Pearl King Oyster Grain Spawn (Pleurotus Hybrid)
Black Pearl King Oyster Grain Spawn (Pleurotus Hybrid)
Black Pearl King Oyster Grain Spawn (Pleurotus Hybrid)
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Black Pearl King Oyster Grain Spawn (Pleurotus Hybrid)

Regular price $25.00

Unit price per 


Package contains:

  • 1kg of mushroom grain spawn ready and waiting to inoculate bulk substrate.
  • Grain is Australian-grown, certified biodynamic wheat sterilised at 121°C in an industrial autoclave.
  • Prepared in our purpose-built, high quality cleanrooms and laboratory facility.

Hint: We use around 250g of grain spawn per 10L bucket of substrate.


Chill in the fridge until ready to use. Use within three months for best results.

See below for more growing details.


We promise to get your fungi flourishing! We hand-on-heart believe everyone can grow their own mushrooms and we’re here to help with expert advice and know-how.

So don’t be shy, please get in touch with all your curly questions and we’ll get you growing mushrooms in no time!



  • Certified Australian Made
  • Cultured here at our Brisbane facility
  • Support our small (but mighty) independent business!


  • Made on Australian certified biodynamic wheat grain


  • Recycle the plastic spawn bag in RedCycle Bins
  • Shipped using biodegradable tape in a recyclable cardboard box


Are you a mushroom farm looking for a regular supply of commercial quantities of high quality grain spawn?

We have bulk rates for commercial customers. Get in touch with us for more information.


We strongly recommend shipping grain spawn via Express Post as mycelium is extremely sensitive to temperature changes and transport conditions.


We’ll almost always ship the same-day if ordered before 12pm, and next day after 12pm (please just allow us a little wiggle room for a few rare occasions). In super busy times please allow 3-4 days for dispatch.

Please note this applies to all orders, including our express post shipments.  

Tracking information

Once your order has been shipped, you’ll receive an email with your tracking link so you can stay up to date with where your order is at.

Delivery times

Delivery times are tricky to provide these days. You’ll be able to check your unique delivery estimate provided by Australia Post via the tracking link in your email with the subject “Your order has been shipped!”. 

Shipping destinations

We ship Australia-wide. We currently do not offer international shipping, sorry team!

Growing details


Species name: Pleurotus sp. "Shimofuri hiratake" or Black Pearl King

The Black Pearl King Oyster is new in the world of mushroom growing! This strain is a hybrid between a King Oyster and a Peal Oyster, cross-bred in Japan. Its Japanese name, Shimofuri, means 'marbled' and refers to its beautiful speckled caps which almost look like stars in the night sky against the dark pin heads during early growth.  

This hybrid displays favourable traits from both parent species, forming dense clusters of King Oyster-like mushrooms with dark caps. Unlike other Oyster varieties, the stems of the Black Pearl King are great to eat (similar to the King Oyster) and are very meaty and juicy and easily pull apart.

Interestingly we have found this hybrid to be spore-less.


Black Pearl Kings can be grown on a variety of substrates including hardwood sawdust, barley straw, and sugarcane mulch.

For highest yields and heaviest clusters grow on supplemented hardwood sawdust or Masters' Mix.


Incubation period: 18 - 21 days (depends on substrate). Average incubation period is 21 days.

Incubation temperature: Room temperature between 21 - 24°C. Do not let the substrate temperature exceed 30°C.


Pinning temperature: 15 - 18°C 

Pinning humidity: 90 - 95% relative humidity


Fruiting temperature:

Range: 15 - 21°C
15 - 18°C

Fruiting humidity: 85 - 90% relative humidity

CO2 concentration: 500 - 800 ppm

Important note: these growing guidelines are drawn from our years of experience as commercial mushroom growers. They are a guide only. We encourage experimentation to discover what works best for your individual conditions.

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