• Milo Grain Bag

  • Sterile 3 pound Milo grain bag with injection port
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  • Dry Shredded | Horse Manure

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  • Manure Based | Substrate

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Milo Grain Bag

Sterile 3 pound Milo grain bag with injection port Shop Now

Dry Shredded | Horse Manure

Visit our products page to learn more. Shop Now

Manure Based | Substrate

Visit our products page to learn more. Shop Now

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At MPSubstrates, we’re passionate about providing top-tier mushroom cultivation products for customers who value quality and trust. Our mission is to offer reliable growing materials that meet high standards for freshness, purity, and performance.

We’re committed to exceptional customer care, fast shipping, and a smooth shopping experience—from seed to satisfaction.

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All in one grow kit
All in one grow kit
All in one grow kit
All in one grow kit
  • Load image into Gallery viewer, All in one grow kit
  • Load image into Gallery viewer, All in one grow kit
  • Load image into Gallery viewer, All in one grow kit
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All in one grow kit

Includes two sterilized 2 lb milo grain bags with injection ports and two pasteurized 3 lb manure substrate bags. Culture not included. ...
$30.00
$30.00
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Includes two sterilized 2 lb milo grain bags with injection ports and two pasteurized 3 lb manure substrate bags. Culture not included.

Simply inject 5–10 cc of your edible mushroom liquid culture into each grain bag. Allow the grain to fully colonize, then transfer the colonized grain into a substrate bag.

Seal the bag — folding the top over and taping it shut works fine if you don’t have a bag sealer — then mix the grain and substrate thoroughly. Let it colonize for 10 days.

After colonization, cut a 2” slit just below the filter patch and watch your mushrooms flush beautifully!

Each grain bag inoculates one substrate bag.

Expect better yields and higher success rates compared to traditional all-in-one bags!