Do it yourself and save money! The famous supplemented hardwood substrate ingredients. Including added trace minerals and gypsum included, the mix contains 50% soya hulls and 50% hardwood pellets. The wood in our substrate is 100% hardwood oak.
 
This dry, substrate mix can be used for any wood-loving mushroom species, ready for you to easily hydrate and sterilise at home. We have particularly amazing results growing King Oyster, Grey Oyster, Lions Mane and Shiitake strains, all of which are available as liquid cultures from us here.
 
Our Master's Mix is supplied with a large filter-patch mushroom bag. Simply pour in 1,250ml of tap water to create a 2.2kg (5lb) substrate block. We recommend that you seal the bag with an electric impulse sealer and sterilize it for a minimum of 90 minutes at 121ºC - 15psi. alternativly you can steam single bags on the stove for 4 hours or 2 bags for 6 hours.