Masters Mix. The famous, leggendary, supplemented hardwood substrate block. As well as trace minerals and gypsum to adjust pH, contains a mix of 50% soya hulls and 50% hardwood pellets. The wood in our substrate is 100% hardwood and contains only pure English oak.
 
This substrate can be used for any wood loving mushroom species. We have seen particularly high yields growing king oyster, Grey Oyster, Lions Mane and shiitake strains, all of which are usually available as liquid cultures from us.
 
This product is sealed in filter patch mushroom bag and can be stored in the fridge for up to 14 days. For best results, use as soon as possible.
 
Each substrate block is sealed and then sterilised in a computer controlled, purpose built steriliser. all at at 15psi / 121ºC for 120 minutes.
 
Our substrate is prepared in a cleanroom where the filtration is rated at HEPA H13. (> 99.95% MPPS, > 99.97% 0.3µm).
 
For the best chance of achieving contamination free results, observe sterile technique and use a flow hood or at the very minimum, a homemade glove box.
 
Sealed before sterilisation
Automated, computer controlled sterilisation
Quality controled
Free from contamination at delivery
No quibble customer services