Spent Mushroom Substrate Blocks

Spent Mushroom Substrate Blocks

$3.00

These substrate blocks are made with hardwood sawdust, nitrogen-rich USDA organic soy hulls, and are PACKED with living mycelium. They are a great soil amendment, addition to a compost heap, food for vermiculture, compost tea base, and more. Help loop the food system with this all natural fertilizer!

NOTE: If you choose to consume mushrooms that grow from spent mushroom substrate, FUNJ Shrooming Company LLC frees itself of liability from mushroom identification, proper harvest, consumption, and others not listed here. You consume mushrooms grown from spent mushroom substrate at your own risk.

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Please read the complete disclaimer about spent mushroom substrate below:

Spent Mushroom Substrate (“SMS”) Disclaimer

Please read this disclaimer carefully before using or handling your SMS blocks. By accepting delivery of these blocks, you acknowledge and agree to the following terms:

1. Intended Use

  • Primary Use: These SMS blocks are sold solely for composting and soil-amendment purposes.

  • Secondary Use (At Your Own Risk): Some customers choose to incubate the blocks in outdoor garden beds to attempt further mushroom cultivation. We do not guarantee fruiting success, and any such use is entirely at the user’s own risk. If you choose to grow mushrooms with spent mushroom substrate, FUNJ Shrooming Company LLC frees itself of liability from mushroom identification, proper harvest, consumption, and others not listed here. You consume mushrooms grown from spent mushroom substrate at your own risk 

2. Product Condition

  • “As‑Is” Sale: Blocks are shipped “as-is,” with all visible mycelium and after all marketable mushrooms have been harvested. We make no promises regarding appearance, microbial composition, mycelium species, or residual nutrient content.

  • Natural Variability: Because these blocks are organic and biologically active, you may observe:

    • Mold growth

    • Colonization by other fungi, bacteria, insects, or microorganisms

3. Health & Safety

  • Allergens & Irritants:

    • Wood dust, soy proteins, and fungal spores can trigger allergic reactions or respiratory irritation in sensitive individuals.

    • Wear gloves and, when handling large quantities or powdery material, consider a dust mask or respirator.

  • Pathogens & Contaminants: While we follow good manufacturing practices, SMS is not sterile after the harvesting process. As it is a natural, organic product in the process of decomposition meant for composting purposes, you assume all risk of exposure to potential pathogens (e.g., bacteria, molds).

  • Not for Consumption: Under no circumstances should this product be ingested or used as animal feed.

4. Limitation of Liability

  • No Warranty: We expressly disclaim any and all warranties – whether statutory, express, or implied – including but not limited to warranties of merchantability, fitness for a particular purpose, or non‑infringement.

  • Assumption of Risk: By using or handling this product, you assume all risks of personal injury, illness, property damage, or crop loss, however caused.

  • Maximum Liability: In no event will FUNJ Shrooming Company LLC or its affiliates, officers, employees, or agents be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or relating to your use of this product, even if advised of the possibility of such damages. Our total liability for any claim related to this product is limited to the purchase price paid.

5. User Responsibilities

  • Proper Handling & Storage: Store in a cool, dry location away from direct sunlight. Wash hands thoroughly after handling.

  • Regulatory Compliance: You are responsible for complying with any local regulations regarding the use, composting, or disposal of organic agricultural materials.

  • Disposal & Composting: Incorporate into your compost pile or soil per standard composting guidelines. Do not dispose of blocks in storm drains, waterways, or municipal trash without checking local rules.

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