North Spore BOOMR BAG – BULK – Sterilized Manure Based Substrate

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PRICE: $156.80

Increase your mushroom grow with North Spore’s manure-based substrate, specially designed by mycologists for maximum yield.


Free shipping available for orders $100 or more. Manufacturer Direct and special order items may require extra charges. See the Docs & Downloads section for product labels and other important information. Questions? Contact us!

Product Features List
  • Specially formulated substrate mix.
  • Helps dung-loving mushroom species achieve maximum yields. 
  • Professionally sterilized to reduce contamination risk.


Boomr Bags contain North Spore’s specially formulated mix of composted horse manure, coco coir, and North Spore’s proprietary blend of high-quality substrate supplements, carefully designed to help dung-loving mushroom species achieve maximum yields. 

Each Boomr Bag is sterilized in a commercial-grade autoclave to preserve your sterile work space. Sterility is verified using biological indicators and temperature sensors.


Please select a variation to see its technical specifications


Use Boomr Bag in monotubs, filter bags, and outdoor beds. Or, grow mushrooms from the bag or tray in a humidity-controlled grow room or “Martha”-style mid size grow chamber.

Boomr Bags should be stored out of direct sunlight at room temperatures, and can be stored for several months before use.

Spawn to bulk ratio: Recommended mix is 1 colonized grain spawn bag per 2-3 Boomr Bags.

Use clean hands, latex or nitrile gloves, and sterile technique when using Boomr Bag to reduce the introduction of contaminants. Be sure to mix colonized grain spawn thoroughly into your substrate. 

It is best practice to wait a minimum of 1 week after arrival before using sterile substrates to ensure they were not compromised during transit.

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