'Boomr Bag' Sterile Manure-Based Mushroom Bulk Substrate (5 lbs)

Save on Boomr Bags when you buy in bulk

Save 10% when you buy 4
Save 20% when you buy 8
Save 25% when you buy 12

Discounts will be reflected at checkout

Please take note of our current processing times here

Our best-selling Boomr Bag is a sterile bulk mushroom substrate formulated by mycologists to maximize your mushroom yield. It 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 dung-loving mushroom species and is widely-trusted by mushroom growers.

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

Adding Your Grain Spawn:

We recommended 1 lb of colonized grain spawn for each 5 lb Boomr Bag. (Higher inoculation rates may improve your success.) Be sure to mix your grain spawn thoroughly into your Boomr Bag substrate. We always recommend clean hands and latex gloves to reduce the introduction of contaminants.

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. 

Storage:

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.

Made by Expert Mycologists:

With a vertically integrated spawn facility and team of trained mycologists, we provide premium mushroom supplies to innovative growers. Through years of research and development we’ve created the best sterile mushroom substrates on the market.

New To Mushrooms?

Watch this video to learn how to use your Boomr Bag! Or, click here for a more-detailed mushroom growing walk-through.

*North Spore's products shall be used only for lawful purposes!