Colonized Grain Spawn

Our mushroom spawn is fully colonized grain, ready to use. We inoculate sterilized grain with an isolated culture of the strain you choose. Then we let it grow in our lab until every kernel is white. As a result, you skip the slowest and riskiest step of the grow.
Pick a 2 L or 4 L bag and choose your strain at checkout, from Golden Teacher and Jack Frost to APE and Penis Envy types. Because we grow each bag after you order, it takes 2 to 4 weeks to prepare.
When it arrives, break up the grain and mix it with coir substrate in a monotub or grow bag. Not ready yet? Keep the bag in the fridge at 2–8°C for up to two weeks.
Prefer to make your own grain spawn? Inject our sterilized corn with a liquid culture syringe. We ship fresh mushroom spawn from the Netherlands across Europe.