Pasteurized Mushroom Substrate (5lbs)

(13 customer reviews)


Premium Mushroom Substrate Formulated for Manure Loving Species

  • Manure Based Substrate

  • Pasteurized and ready to use

  • Designed for Ideal PH Levels and Nitrogen Content

  • Hydrated to Ideal Moisture Capacity

Available on backorder

SKU: MMS-223867-3 Categories: , Tags: , ,


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

Our ready-to-use mushroom substrate is made using a tried and true blend of coco coir, vermiculite, and gypsum, which is then fortified with several quality substrate additives, including organic worm castings, tortoise dung, and gypsum. This blend features ideal nitrogen levels, PH buffered, and ideal hydration for manure-loving species. 

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 85 oz
Dimensions 7 × 7 × 7 in

13 reviews for Pasteurized Mushroom Substrate (5lbs)

  1. ctew34 (verified owner)

  2. Patrick Louis Albrechtsen Clausen (verified owner)

  3. Jim Cantrell (verified owner)

    The best mushroom substrate I have used so far. Thanks! Jim

  4. Mark (verified owner)

    Bought the 5 pound mushroom substrate and used it in my 27 qt monotub. Really good results so far, I am on my second flush and its still going strong!

  5. James D (verified owner)

    Quality substrate at a fair price, as described, my expectations are fully met! Thank you!

  6. James F (verified owner)

    Fast delivery, good product and very professional. Get sub from Milliken Mushrooms!

  7. Andrew (verified owner)

  8. Davoy (verified owner)

  9. Amanda (verified owner)

  10. Danny (verified owner)

  11. Maridith (verified owner)

  12. Angel (verified owner)

    Good service.

  13. Hayli (verified owner)

    Excellent product, worth every penny! If you’re looking for success with your mycelium, you need these bags. I absolutely love them and the customer service I’ve received has far exceeded expectations. This shop offers prompt replies and professionally handled task management (in my case a shipping error that was quickly resolved with 5-star service). If you’re debating whether you need these, let this be your answer. You won’t be disappointed.

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