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๐ Elevate your grow game with Boomr Bag โ where science meets serious yield!
North Spore's Boomr Bag is a 5 lb sterile, manure-based bulk mushroom substrate expertly formulated by mycologists. Featuring a proprietary blend of composted horse manure, coco coir, and supplements, it is pre-hydrated and optimized for dung-loving mushroom species. Trusted by growers for use in monotubs, filter bags, and outdoor beds, it supports a recommended spawn-to-substrate ratio of 1:2-3 to maximize yield and colonization speed.



























| Brand | North Spore |
| Global Trade Identification Number | 00851555008931 |
| Item Weight | 5 pounds |
| Number of Packs | 1 |
| Style | Sterile substrate |
| Style Name | Sterile substrate |
| UPC | 851555008931 |
| Volume | 4.75 liters |
C**E
Great product
Works great. 1st time doing this and itโs been a breeze
R**E
quality product
quality product
T**E
Best pre-pasteurized substrate I've found.
I switched to boomr bags after being unsatisfied with other pre-pasteurized substrates and mixing and sterilizing my own. It's not cheap, but the end result is superior. Keep bag for at least a week before using to check for contam. North Spore will replace for free any contaminated bags if you contact them. I've never seen a contaminated bag even after over 20 orders, but I have had to get north spore to replace a grain bag which they did hassle-free. Just take a pic of the contaminated and the lot number sticker on bag and email them. For anyone saying this substrate doesn't work for manure lovers, I'd say you just don't know how to grow mushrooms. A lot of people contaminate batches themselves without realizing it. The bag may come too wet or dry. Too dry, just spray with distilled water during mixing with spawn in sterilized room. Too wet (you can tell if water separates from substrate and you can see liquid in bag) let it dry out by spraying breather patch with alcohol and unfolding bag a little and let sit a few days. Always spray breather port with alcohol before handling or moving it from box. Airborne bacteria can get pulled into bag from patch.
A**O
Nope.
Extremely disappointed with this product. I practiced very good sterility, and yet everything that I used this in became contaminated quickly. While also compared to when I began making and pasteurizing/sterilizing my own substrate which never had any problems. Unfortunately I made a bulk purchase too hastily.
A**R
Wait a few weeks before going to bulk.
Original order was for 2 dung lovers bags, waited a few weeks and saw that one was contaminated. Contacted North Spore directly with my Amazon order # and they immediately sent me a replacement. Great customer service response and communication. Ordered 3 more dung lovers bags due to my needs and currently waiting to see if they along with the replacement crop up with contamination. Great response from North Spore otherwise.
C**.
The best
Great product. Great company. Great customer service.
S**Z
Very happy
This sat for weeks before use, no issues with leaks or any kind of bad stuff growing in it. Moisture content was perfect even after sitting so long. I added this to two separate bags of mycelium that was growing in other substrate bags, allowed a few days to mix and colonize a bit more, then dumped into growing trays that had lids and air vents. Mycelium fully colonized within a week, thick white carpet of fuzz was gorgeous and happy. Moisture content stayed perfect throughout growing cycle. Absolutely no sign of contamination or mold or anything bad even after several months. Would recommend and buy again
N**.
Mold risk! Use fast, or find better suppliers
Works, definitely better places to get mediums. Tested for longevity and started to mold after a week. They are meant to be used instantly.
Trustpilot
3 weeks ago
2 months ago