








π Elevate Your Grow Game with Boomr Bag!
The Boomr Bag is a 5 lb sterile manure-based bulk substrate designed to maximize mushroom yields. Formulated by mycologists, it features a proprietary blend of composted horse manure and coco coir, trusted by growers for its effectiveness. Suitable for various growing methods, it requires no refrigeration and can be stored for months, making it a convenient choice for mushroom enthusiasts.


























| ASIN | B07TTV73RM |
| Best Sellers Rank | #18,416 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #311 in Garden Soil |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,183) |
| Item Weight | 5 pounds |
| Manufacturer | North Spore |
| Product Dimensions | 8 x 5 x 5 inches |
C**H
Fabulous
North spore does not disappoint! Great products. I keep ordering. Never any issues.
C**S
A little pricey, but worth it!
I got some chonky mushrooms with my Boomr Bag. If you're a newbie, just know that you have to germinate your spores in an agar plate, or BRF jar first.
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.
R**N
Good π©!
If you want the best π© for your Mushrooms, this is the Bestπ©! No ππ©!
A**D
Great mix
I still will put it in the oven for a bit bc most bags ive got contam so i just do it for my personal preference
T**R
Arrived contaminated with mold.
Had everything ready to fill tub. I Had opened my fully colonized spawn to do a grain to grain before using the rest on a tub and sadly when I opened the boomr bag it was contaminated . Luckily I had some substrate stored that was home made but using it was my last resort since It was a bit on the wet side of moisture level. I should have checked the substrate i purchased online before opening my spawn bag. In the future I'll check bags I buy online first . I really wanted this substrate to be good and had faith it would. Hopefully my spawn doesnt go to waste since and I can still get a good harvest. I'm only giving one star due to contamination. I'm sure this product is normally not contaminated and is a great product and I would love to try a bag that isn't contaminated I just dont know if I want to take the chance and have to return another box of substrate.
P**R
First impressions(and 2nd, and 3rd)
This is the 2nd manure based substrate I've tried, the 1st I've had good results from. When I opened the box, comparatively, it looked like mulch. I actually thought they sent wood lovers by mistake lol I'm no expert, but again compared to my trusted brand, this one looks like it's at least 50% coco cior and the other brand looked like it was only 5%. It probably helps with aeration, and it didn't take as long to break up. Oh, and there was a rock over an inch long.... Will overlook that(minus a star tho) and update with how it performs.. I hope their equipment is OK after that went through lol An update.. 2 things. 1. It was extremely hydrated to the point that I had to carefully take the lid off early with something nearby to pour the water in before giant droplets started raining down.. Minus another star. 2. The cleanup was.. Less gross with less poo lol Will give 1 more try with a different one I'm more familiar with just bc of the easy clean up to see if there's a noticeable difference in quality. I do not recommend for things vulnerable to wet spots. Update: They must read these, the next batch was significantly darker lol. I mean, yay for this time(I hope, still too early), but it also tells me the product isn't consistent. Unless I see 3 nice tasty flushes this time, I'll stick to the other comparatively priced one. Final update: Did not see 3 flushes out of something I've seen have more. Still not a high enough poo to coco coir ratio methinks. I'm not an expert, but I'm not sure why their kits have coco coir to put on top of this, it seems to have enough lol
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
Trustpilot
3 weeks ago
1 month ago