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Boomr Bag Sterile Manure-Based Mushroom Bulk Substrate




















Media | Horse manure mix |
Moisture content | Hydrated to field capacity |
Bag weight | 5 lbs |
⮕ Looking for bulk packs? Click here
Our best-selling Boomr Bag is a sterile bulk mushroom substrate formulated by mycologists to increase the yield of your grow. 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. 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!
Spawn to bulk ratio
We recommended 1 lb of colonized grain spawn for every 5 lbs of Boomr Bag sterile substrate. (Higher inoculation rates may improve your success.)
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- 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.
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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.
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Our Boomr Bags are sterilized in a commercial-grade autoclave. Sterility is verified using biological indicators and temperature sensors.
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North Spore's products shall be used only for lawful purposes. North Spore does not condone Psilocybin (Psilocybe cubensis) or hallucinogenic (magic) mushroom growing in jurisdictions where it is currently illegal.
North Spore's products shall be used only for lawful purposes. North Spore does not condone Psilocybin (Psilocybe cubensis) or hallucinogenic (magic) mushroom growing in jurisdictions where it is currently illegal.
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Boomerbag = Boom yay!
Never had an issue with this substrate. I’ve tried a few different brands, but none have given me the results that North Spore’s Boomerbags have. Those results being good. Grab a boomer bag if you want and explosion of growth. BOOM! 10/10

This sh*t is awesome
I have purchased from a lot of places over the last 20 years. North Spore has a far superior product.

Substrate
I’m new to mushroom growing and have fell in the rabbit hole! I have not had any issues with any of the substrates I purchased from NS. Amazing products!

best substrate out there
I've ordered substrate from different sources and this worked the best. The box is not wrong when it says big flushes.

Not just another bag of ****!
It is an excellent substrate for all of the **** loving fun-gi!

Boomr Bag - High Quality
Great stuff.
Boomr Bag
So far so good, everything showed up as advertised. Processing times are inconvenient, but I am willing to wait for quality.

BOOMRBAG
Shipping was fine, a little long, but I can appreciate that because the products are made fresh. The BoomrBag is an amazing product I've ordered several now and have not been let down. I would, and have, recommend this product from this company to friends and family.
BOOMRBAG
Shipping was fine, a little long but, I can appreciate that because the products are made fresh. The BoomrBag is an amazing product i've ordered several now and have not been let down. I would, and have, recommend this product from this company to friends and family.

Grew some killer Shitakes
Product was received quickly and was exactly as advertised. I had zero problems from start to finish and it was superior to others I’ve tried previously. Northspore is my go-to shop for supplies.