• Milo Grain Bag

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

  • Visit our products page to learn more.
  • Manure Based | Substrate

  • Visit our products page to learn more.

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

MUSHROOM CULTIVATION PRODUCTS CRAFTED WITH CARE

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.

Mr Poopy's Products

  • Grain bag & Substrate 3 packs
    Regular price
    from $20.00
    Sale price
    from $20.00
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    per 
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  • Manure Based Substrate
    Regular price
    from $28.00
    Sale price
    from $28.00
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    per 
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  • Sterile 3 pound Milo grain bag with injection port
    Regular price
    from $42.00
    Sale price
    from $42.00
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    per 
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  • All in one grow kit
    Regular price
    $30.00
    Sale price
    $30.00
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  • Simple CVG Substrate - Coconut Coir, Vermiculite, & Gypsum
    Regular price
    from $32.00
    Sale price
    from $32.00
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    per 
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  • Dry Shredded Coconut Coir
    Regular price
    $10.00
    Sale price
    $10.00
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    per 
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  • Compressed 4.5kg coconut coir bricks
    Regular price
    $10.00
    Sale price
    $10.00
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  • Dry shredded horse manure
    Regular price
    $50.00
    Sale price
    $50.00
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    per 
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  • Unicorn 10T injectable spawn bags with .2 micron filter patch
    Regular price
    from $30.00
    Sale price
    from $30.00
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  • Gypsum powder solution grade
    Regular price
    from $25.00
    Sale price
    from $25.00
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  • Locally produced Raw Honey
    Regular price
    $20.00
    Sale price
    $20.00
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    per 
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  • Autoclave Temperature Probe K type wire
    Regular price
    from $750.00
    Sale price
    from $750.00
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Why Shop with MPSubstrates?

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