King Oyster Grain Spawn (Pleurotus eryngii) | Little Acre
King Oyster Grain Spawn (Pleurotus eryngii)
King Oyster Grain Spawn (Pleurotus eryngii)
King Oyster Grain Spawn (Pleurotus eryngii)
King Oyster Grain Spawn (Pleurotus eryngii)
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King Oyster Grain Spawn (Pleurotus eryngii)

Regular price $25.00

Unit price per 



Package contains:

  • 1 - 2kg 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.

Scroll down 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 eryngii 

There are many common names for this widely cultivated species - King Oyster, King Trumpet, King Brown...but always King. King Oysters are regarded as one of the best tasting of all gourmet mushroom species and are our personal favourite to cook with. Popular with chefs and home cooks alike, these are a staple in the commercial growers' repertoire.

They require cooler temperatures under 21°C and high humidity to set pins. More environmental controls are needed to grow this strain consistently.


King Oysters grow best on hardwood substrates. They can be grown on a straw/sawdust mix but yields will be small.

For highest yields and fast colonisation grow on Masters' Mix.


Incubation period: 21 days (depends on substrate).

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


Pinning temperature: 10 - 15°C 

Pinning humidity: 95 - 100% relative humidity


Fruiting temperature:

Range: 15 - 21°C
15 - 17°C

Fruiting humidity: 85 - 90% relative humidity

CO2 concentration: 500 - 2000 ppm. Low levels of CO2 will form larger caps and shorter stems. If growing for large stems, increase CO2 levels.

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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