Easily grow almost 90% of mushrooms with our proprietary Master's Mix.  The water content and pH is also adjusted for optimal growth. This perfect blend is what we use in all our grow blocks. Ships sterilized and sealed and ready to mix with any grain spawn. Our bags are pressure sterilized at 18psi for 2.5 hours for 100% contamination free growth!

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Price: $12.99
Points to Purchase:1299

Item #: MSR5
Availability: In Stock
Usually ships In 1 Day

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Sterilized Master's Mix Bag 5 lbs sawdust bag, bulk grow, casing, homestead, grow bags, mushroom grow bags

Sterilized Master's Mix Bag 5 lbs

Price: $12.99


Product Pricing Table

Quantity

3-45-910+

 Price Each 

$10.00$8.50$8.00


(Wholesale pricing starting at 5 or more)  Easily grow almost 90% of mushrooms with our proprietary Master's Mix. This mix is carefully dialed in with the perfect  The water content and pH is also adjusted for optimal growth. This perfect blend is what we use in all our grow blocks. Ships sterilized and sealed and ready to mix with any grain spawn. Our bags are pressure sterilized at 18psi for 2.5 hours for 100% contamination free growth!

Each bag features:

  • 5lbs Sterilized Master's Mix
  • 0.5 Micron 14A Spawn Bag
  • Heat Sealed for shipping.

Email us about our Bulk Order Discounts!

A sterilized bag of Master's Mix is a nutrient-rich, fully sterilized substrate made from hardwood sawdust and soy hulls, designed to be inoculated directly with colonized grain spawn in a sterile environment. Unlike Coir based bulk substrate like our Select Bulk Casing, which are used in non-sterile conditions as a mix in a tub or top casing layer, Master's Mix is not meant to be exposed to open air or mixed in unsterile tubs. Doing so increases the risk of contamination and defeats the purpose of sterilization. Instead, add your grain spawn directly into the sealed bag using a sterile technique, allow full colonization, and then fruit the mushrooms by cutting open the bag or transferring the colonized block to a clean fruiting chamber. 

Overall Customer Rating of 19 Reviews:
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Proper substrate

Rating:
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Pros:
  • Ship fast
  • Price was right for the moment
Cons:
  • Worried about dryness
  • but we will see
My order of the substrate arrived on time and was put work right off.(I had a spawn bag already i occulated and ready.
Just colonizing now.
All went well and may use again

Boonville, MO

Bulk spawn casing and substrate

Rating:
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Cons:
This is an excellent substrate already sterilized it has the correct amount of moisture and everything is all ready to go If you use this you're sure to have a great results in your mushroom cultivation as long as you have a good grain spawn

Michigan

Rating:
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Pros:
  • Price
  • Quality
  • Amount
Cons:
Product came swiftly and in a secure box. So far the substrate has been successful in recolonizing my lions mane

Missouri

Substrate

Rating:
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Pros:
Cons:
Great product, I really like it

Texas

Best

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Pros:
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Best sterile cow dirt I've found