Collection: Sterile Grain

Sterilised grains are a sterile bag of grains that provides a nutritious, contamination-free environment for mycelium to grow on before transferring to a bulk substrate.

Sterile grain is a great starting point for spores/liquid cultures if you don't fancy using agar. Plus, as most mushroom strains won't grow directly on bulk substrates, colonised grains will give you enough points of inoculation to colonise substrate rapidly. For details on how to use sterile grains, check out our guides.

To make grain spawn, just inoculate any of these bags of sterile grain with a spore syringe or liquid culture and let them grow! Once mycelium has fully colonised the bag of grain, you can safely call it grain spawn.

Sterile grain bags can keep for up to 3 months when stored in a cool, dry room and out of direct sunlight.

We sterilise all our grains in bags inside our medical grade autoclave for 2 hours and 30 minutes, with a pressure of at least 15 PSI and a temperature of 121ºC. Then, we seal the bags in front of a laminar flow hood in our clean room.

Yes! We automatically apply discounts on bulk orders of up to 100 sterile grain bags. If you're after a customer order or want a wholesale quote for sterile grain bags, then just contact us directly.