Premium Warm White oyster mushroom grain spawn – 100% colonised on locally sourced New Zealand grown wheat and ready to be mixed into your substrate for fruiting mushrooms. Spawn is ready to use as soon as it arrives.
 
Known as Warm White Oyster or Summer White Oyster (Pleurotus ostreatus), this pristine white to caramel strain is fast growing and good yielding with quality fruit bodies. It’s a reliable, vigorous, wood-loving side and top-fruiter that tolerates heat well and produces in wide range of growing conditions. Offering world class genetics for large harvests!
 
Unique Warm Winter Oyster Mushroom Culture Information
 
Scientific name: Pleurotus Ostreatus
Flavour & texture: Mild, earthy flavour with subtle anise notes and nutrient-rich harvests.
Spawn Storage: If you cannot use your spawn right away you can store it for up to 4 months in the fridge. Spawn vitality cannot be guaranteed with fridge storage.
Difficulty: Easy - Beginner friendly.
Growth speed: Very fast - oyster mushrooms are aggressive growers, perfect for beginners.
Incubation time & temperature: 7-12 days @ 23-25°C
Fruiting temperature: 15-30°C
Yield: Good but not as high as some other strains.
CO2 Tolerance: Good - fruits best below 1000ppm
Ideal Fruiting Humidity: 80-90%
Native status: Non native - Imported
Recommended Fruiting Substrates: Cereal Straw (Wheat or Barley), Masters Mix (50% wood pellets / 50% soy hulls) or 20% Bran + 80% Pine Fire Pellets.
Substrate Preparation Method: Oyster grow well on both Heat or Hydrated lime pasteurised substrate as well as 15PSI pressure sterilised substrate in filter patch bags.
Growing Style:  Side fruiting strain that grows well in >> filter patch bags, >> straw poly tube bags and buckets. 
 
Receiving Spawn:
Upon receiving your spawn it is ideal to take it out of the box within a day or two, stand the top of the bag up so the filter patch is exposed and the spawn can breath. Keep in a room temperature (10-25°C) place out of direct sunlight until used.
 
Beginners / first-time growers:
If you’ve never used grain spawn before (or you’re not sure how to mix it into substrate), start with our >> Easy 5 Step Oyster Grow Kits instead.
These kits include grain spawn and bulk substrate with detailed step-by-step instructions that teach you exactly how to use spawn to grow mushrooms. It’s the easiest way to learn the whole process hands-on.
 
All spawn and culture work is done in-house in our own laboratory.
 
All spawn cultures we offer have been sourced within NZ or imported under MPI import permit with permission to on-sell.
 
Customers who buy Mushroom Grain Spawn often also purchase:
 
>> DIY Warm White Oyster 5 step kit (7kg) - learn How to use spawn if you are a beginner
 
>> Sterilised Grain for growing mushrooms
 
Always identify any mushroom before consuming!