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Writer's pictureDave Holland

Master's Mix: what is it and why use it to grow mushrooms?

Master's mix is a popular substrate for growing gourmet mushrooms because it is easy to

sealed block of master's mix substrate
10 lb block of pasteurized Master's Mix substrate

use, provides good drainage, and contains all the nutrients that mushrooms need to grow. It is made from a 50/50 blend of hardwood sawdust and soy hulls. 


Master's mix is a good choice for beginners because it is easy to prepare and use. It can be sterilized in a pressure cooker or oven, or it can be pasteurized in a water bath or steam. Once the substrate is prepared, it can be inoculated with mushroom spawn and then placed in a fruiting chamber.


Master's mix is a good choice for growing a variety of gourmet mushrooms, including oyster and lion's mane mushrooms. It is also a good choice for growing some medicinal mushrooms.


Here are some of the benefits of using Master's mix for growing gourmet mushrooms:

  • Easy to use

  • Provides good drainage and aeration

  • Contains all the nutrients that mushrooms need to grow

  • Can be used for a variety of gourmet mushrooms

  • A good choice for beginners

If you are looking for a good substrate for growing gourmet mushrooms, Master's mix is a great option. It is easy to use, provides good drainage and aeration, and contains all the nutrients that mushrooms need to grow. Oak & Hazel grows their mushrooms using Master’s mix in all of their grow kits for these reasons. 


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