Premium Pearl 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.
 
Pearl Oysters are the classic wild-type strain of Pleurotus ostreatus. It produces attractive pearl-grey to light-blue caps (sometimes called Tree Oyster), with white gills and stems. This strain is a prolific producer often fully covering the bag as pictured. A reliable, vigorous, wood-loving side-fruiter, highly recommended commercial strain that tolerates a wide range of temperatures an growing conditions!
 
Unique Culture Information
 
Scientific name: Pleurotus Ostreatus
Flavour & texture: The flavour is mild, earthy, and slightly nutty with thinner caps that crisp well when cooking
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: Very 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: 10-30°C
Inoculation to Harvest: 15-19 days
Yield: Very high with many quality fruit bodies.
CO2 Tolerance: Good - fruits best below 900ppm
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:  Oyster mushrooms grow 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 onsell.
 
Customers who buy Mushroom Grain Spawn often also purchase:
 
>> Pearl Oyster Splash n Grow Kit (2kg) - ready made and easy to grow
 
>> Pearl Oyster 5 Step Mushroom Grow Kit (Makes 7kg grow kit)
 
>> Sterilised Grain for growing mushrooms
 
Always identify any mushroom before consuming!