Search  for anything...
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 1,068 reviews
Condition: New
Checking for product changes
$29.99 Why this price?
Save $3.01 was $33.00

Buy Now, Pay Later

As low as $7 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product
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.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by North Spore Mushroom Company
Arrives Nov 28 – Nov 30
Order within 6 hours and 24 minutes
Available payment plans shown during checkout

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:


Brand Name: North Spore


UPC: 851555008931


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 28 – Nov 30

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

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
    • 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
    • Contamination, Green Mold
Extremely frustrated and disappointed in the complete failure of this product. First time I’ve tried this product rather than pasteurizing my own and likely the last time. I figured I’d give these guys a shot and see if I could save myself some time and capital invested but instead I just ended up wasting my money/time, grainspawn and agar cultures. I was running a side by side comparison with control, 6 cakes with this product; “Boomer Bag” (I should say more adequately named “Bummer bag”) and 6 cakes with my “house” blend. 3 “strains” spawned in grain from same sterilized batch, all work and completed in clean room style Hepa positive pressure environment with merv 16 filtration, with cleaning and sterilization per SOP conducted between each individual cake to prevent cross contamination of individual casings. Any variables were negligible, substrate media and strain genetics being the only known differences. Over the following 10-15 days all six cakes using Boomer Bag substrate developed green mold. Testing was concluded, cakes were removed and destroyed. I know contamination is always a factor and to some extent is expected. So complete failure after extensive time and investment is unacceptable. Especially is a situation where an expensive product is used that is supposed to provide superior results and at the very least be free from contamination. ... show more
Reviewed in the United States on July 8, 2022 by TruPyroDice
    • 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
    • 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
    • Contaminated and overpriced
Two separate occasions I bought this substrate, 1st grow was okay, nothing special. 2nd purchase, my tubs became contaminated within two days. I know it was the substrate bc after checking the remaining substrate in the bag, it was also contaminated. Emailed the company two or three times, called… no reply. Make your own CVG. Cheaper and you have much more control…Thus, better yields ... show more
Reviewed in the United States on July 29, 2024 by Phil
    • Great blend
Amazing substrate. Magical yeilds and multiple flushes.
Reviewed in the United States on June 9, 2024 by Me

Can't find a product?

Find it on Amazon first, then paste the link below.