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BOOMR Bag Sterile Substrate

Original price $29.99 - Original price $29.99
Original price
$29.99 - $29.99
Current price $29.99

'Boomr Bag' Sterile Manure-Based Mushroom Bulk Substrate

Media Horse manure mix
Moisture content Hydrated to field capacity
Bag weight 5 lbs


Improve the yield of any dung-loving mushroom species with our best-selling Boomr Bag! This sterile bulk mushroom substrate is formulated by mycologists and features a proprietary blend of composted horse manure, coco coir, and several quality substrate supplements (although we keep the exact blend a secret!) Over several years, it has been perfected for a wide range of dung-loving mushroom species and is widely-trusted by mushroom growers. Note: Substrate is hydrated to field capacity.

Use your Boomr Bag in monotubs, outdoor beds, or to grow mushrooms from the bag in a humidity-controlled grow room or Martha setup!

We recommended 1 lb of colonized grain spawn for every 5 lbs of Boomr Bag sterile substrate. (Higher inoculation rates may improve your success.) 

  • We recommend clean hands and latex gloves 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. Rest assured that your purchase is 100% guaranteed. If your substrate was compromised, we will replace it. 

Boomr Bags should be stored at room temperature out of direct sunlight. No refrigeration is necessary. They can also be stored for several months before use.

Our Boomr Bags are sterilized in a commercial-grade autoclave. Sterility is verified using biological indicators and temperature sensors.

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