ASIN B07TTV73RMImage via Amazon
North Spore Boomr Bag Sterile Mushroom Substrate, Manure-Based, 5 lb | sterilized mushroom growing substrate for monotubs, mycologist-formulated for dung-loving species, trusted by 350K+ growers
- Higher Yields From a Substrate Built for the Job
- A Proprietary Manure-Based Mushroom Substrate Blend That Works
- Trusted by 350K+ Mushroom Growers and Counting
- Versatile Enough for Any Setup
$29.99
Price as of Oct 16, 2026, 7:47 AM UTC. Prices and availability are subject to change. The price shown on Amazon at the time of purchase applies.
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Key features
Higher Yields From a Substrate Built for the Job
Boomr Bag is a sterile mushroom growing substrate formulated by mycologists specifically for dung-loving species; each batch is sterilized in a commercial-grade autoclave and lab-tested with biological indicators for contam-free performance
A Proprietary Manure-Based Mushroom Substrate Blend That Works
made from composted horse manure, coco coir, and select substrate supplements, hydrated to field capacity, with balanced pH, rich nutrients, and aeration properties that support vigorous mycelial growth and consistent fruiting
Trusted by 350K+ Mushroom Growers and Counting
North Spore's Boomr Bag has been refined over several years, made entirely from organic, non-GMO materials free of harmful additives, so beginners and experienced cultivators alike get a clean, reliable start every grow
Versatile Enough for Any Setup
use Boomr Bag in monotubs, filter patch grow bags, trays, and outdoor beds, or grow directly from the bag in a humidity-controlled grow room or Martha setup; mix 1 colonized grain spawn bag with 2-3 Boomr Bags for best results
No REFRIGERATION, No Stress
store at room temperature out of direct sunlight for several months; for best results, wait at least 1 week after arrival before use, and always apply sterile technique when inoculating to protect your investment
North Spore Boomr Bag Sterile Mushroom Substrate, Manure-Based, 5 lb | sterilized mushroom growing substrate for monotubs, mycologist-formulated for dung-loving species, trusted by 350K+ growers
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