Pasteurized Mushroom Substrate (10lbs) – Manure Based Bulk Substrate

(10 customer reviews)


Premium Mushroom Substrate Formulated for Manure Loving Species

  • Highly Nutritious Mushroom Substrate

  • Designed for Ideal PH Levels and Nitrogen Content

  • Hydrated to ideal moisture capacity

  • Approximately 10 quarts of substrate

  • Ready to use

  • Made to order. Please allow 4-6 days for product to ship

Available on backorder


This best-selling bulk substrate is formulated for maximum yields and fast colonization.

Called by some as the Genus Mix, this bulk growing substrate is a proprietary manure-based blend designed to provide the ideal moisture, PH levels, and Nitrogen for all of your manure-loving mushroom species. Your mushrooms will thrive in this bulk substrate comprised of manure, coco coir, vermiculite, gypsum, and organic earthworm castings.

Use this bulk substrate in monotub, shoeboxes, or grow directly from the spawn bag.
Using Mushroom Substrates with Grain Spawn:
For best results, we recommended using 2-3 lb of colonized grain spawn for each 5 lb bag of the substrate. The closer the ratio of spawn to the substrate (by volume), the shorter the colonization time, and subsequently, the likelihood of contamination.
Substrate Storage:
Our substrate can be stored for several months before use. Keep the substrate bag at room temperature and out of direct sunlight. Refrigeration is not necessary.

The bag will arrive hydrated to ideal capacity, pasteurized, and ready for use.

Additional information

Weight 170 oz
Dimensions 10 × 10 × 10 in

10 reviews for Pasteurized Mushroom Substrate (10lbs) – Manure Based Bulk Substrate

  1. lotlax (verified owner)

    Swift delivery, nicely packaged, 10/10

  2. Dustin Sapington (verified owner)

    Works great.

  3. Barbie (verified owner)

    This stuff rocks! I love making my own sub but I rarely have the time these days. After trying substrates from many different companies, this is the only one that performs as well (if not better) than my own recipe. Thank you!

  4. Jason Riley (verified owner)

    Perfect as usual

  5. Jason Riley (verified owner)

    Perfect as usual

  6. Andrew (verified owner)

  7. Shawn (verified owner)

    Awsome dope sweet love mush

  8. Jake Smith (verified owner)

    Best substrate I’ve used. Fast delivery really good results. Highly recommend

  9. ryan (verified owner)

    Super fast shipping, good quality

  10. Ryder (verified owner)

    Very fast delivery.

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