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North Spore

‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore

    • Based on 1,078 reviews
Condition: New
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$29.99 Why this price?
Holiday Deal · 14% off was $34.99

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As low as $7 / mo
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by North Spore Mushroom Company
Arrives Dec 31 – Jan 3
Order within 9 hours and 15 minutes
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Features

  • INCREASE YOUR YIELD: Our best-selling Boomr Bag is a sterile manure-based bulk mushroom substrate formulated by mycologists to increase the yield of your grow.
  • PREMIUM MANURE BLEND: It features a proprietary blend of composted horse manure, coco coir, and several quality substrate supplements (although we keep the exact blend a secret!)
  • TRUSTED BY GROWERS: Over several years, Boomr Bag has been perfected for dung-loving mushroom species and is widely-trusted by mushroom growers. Note: Substrate is hydrated to field capacity.
  • FOR EVERY TYPE OF GROWER: Use Boomr Bag in monotubs, filter bags, and outdoor beds. Or, grow mushrooms from the bag or tray in a humidity-controlled grow room or Martha set up.
  • SPAWN TO BULK RATIO: We recommended mixing 1 colonized grain spawn bag with 2-3 Boomr Bags. (Higher inoculation rates may improve your success.)
  • 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.
  • BEST PRACTICES: We recommend clean hands, latex or nitrile gloves, and sterile technique when using Boomr Bag to reduce the introduction of contaminants. It is also best practice to wait a minimum of 1 week after arrival before using sterile substrates to ensure they were not compromised during transit.

Brand: North Spore


Style: Sterile substrate


Item Weight: 5 Pounds


Item Volume: 4.75 Liters


UPC:


Product Dimensions: 8 x 5 x 5 inches


Item Weight: 5 pounds


Manufacturer: North Spore


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 31 – Jan 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • High quality and looks well made.
Fast shipping and very clean and high quality from its box and provided instructions to the actual bag all top notch quality, I will update about the results but so far I am happy with my purchase and definitely purchase more of this products of this seller. Highly recommended
Reviewed in the United States on November 1, 2024 by mehran
    • works
wasn't enough
Reviewed in the United States on November 13, 2024 by James delenbach
    • 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. ... show more
Reviewed in the United States on January 21, 2023 by Travis Lee
    • Every single purchase was contaminated.....
Like the title says. Contamination. The whole process went smoothly until I used what I was led to believe was a reputable product. I've had 5 contaminated grows now using 2 Boom bags each. That's over $300 worth of bad product. At first I thought it might be something I did until I noticed 2 unopened bags covered in mold on the inside. This is very very disappointing. ... show more
Reviewed in the United States on November 17, 2024 by Josh
    • Nice topping
Review Image by Joshua L. Hayes Joshua L. Hayes
Review Image by Joshua L. Hayes Joshua L. Hayes
I spread this over my grain spawn once the mycelium had completes enveloped the grain spawn. I think it really encouraged fruiting and I got some huge mushrooms.
Reviewed in the United States on August 18, 2024 by Joshua L. Hayes Joshua L. Hayes
    • Boomrbag.
Review Image by Scott Scott
Everything was good. Easy to use . I've bought this twice now after first time getting it as a gift and have all been good clean substrate . Good growth in all three.
Reviewed in the United States on August 7, 2024 by Scott Scott
    • Not great and expensive
I gave it 3 stars because the first time I used it was fine (not great, contamination manageable) but I got mad contamination when I used it recently. I’ve used other brands of the same type of product with great success. I spent the money and thought I was getting a substrate I wouldn’t have to worry about, but unfortunately that was not the case. ... show more
Reviewed in the United States on November 28, 2024 by Olaf Bjornstal
    • 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 ... show more
Reviewed in the United States on October 24, 2023 by Svz

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