--- product_id: 453951439 title: "‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore" brand: "north spore" price: "1544.60 DT" currency: TND in_stock: true reviews_count: 5 category: "North Spore" url: https://www.desertcart.tn/products/453951439-boomr-bag-5-lb-manure-based-sterile-mushroom-bulk-substrate store_origin: TN region: Tunisia --- # 5 lb sterile manure-based substrate Proprietary formula boosts mushroom yield Proudly made in the USA ‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore **Brand:** north spore **Price:** 1544.60 DT **Availability:** ✅ In Stock ## Summary > 🍄 Grow Like a Pro, Harvest Like a Boss! ## Quick Answers - **What is this?** ‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore by north spore - **How much does it cost?** 1544.60 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/453951439-boomr-bag-5-lb-manure-based-sterile-mushroom-bulk-substrate) ## Best For - north spore enthusiasts ## Why This Product - Trusted north spore brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **No-Fridge Storage:** Store at room temperature for months without losing potency—convenience meets performance. - • **Trusted by Thousands:** Over 1,100 growers rate it 4.2 stars for consistent, reliable results with dung-loving mushroom species. - • **Maximize Your Harvest:** Scientifically crafted manure blend designed by expert mycologists to skyrocket your mushroom yield. - • **Ready-to-Use Sterile Bulk:** Hydrated to field capacity and pre-pasteurized for a contamination-resistant, plug-and-play growing experience. - • **Versatile Growing Options:** Perfect for monotubs, filter bags, outdoor beds, or direct bag/tray cultivation in any humidity-controlled setup. ## Overview The Boomr Bag is a 5 lb sterile, manure-based mushroom substrate formulated by mycologists to maximize yields of dung-loving mushrooms. Featuring a proprietary blend of composted horse manure, coco coir, and secret supplements, it’s hydrated to field capacity and trusted by over a thousand growers. Made in the USA, it supports versatile growing methods and requires no refrigeration, making it the go-to bulk substrate for serious cultivators. ## Description Our best-selling Boomr Bag is a sterile manure-based bulk mushroom substrate formulated by mycologists to increase the yield of your grow. It features a proprietary blend of composted horse manure, coco coir, and several quality substrate supplements (although we keep the exact blend a secret!) Over several years, it has been perfected for dung-loving mushroom species and is widely-trusted by mushroom growers. Note: Substrate is hydrated to field capacity. 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. Review: It works Review: Best pre-pasteurized substrate I've found. ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07TTV73RM | | Brand | North Spore | | Customer Reviews | 4.2 out of 5 stars 1,147 Reviews | | Global Trade Identification Number | 00851555008931 | | Item Weight | 5 Pounds | | Manufacturer | North Spore | | Style | Sterile substrate | | UPC | 851555008931 | | Unit Count | 2365.88 Milliliters | | Volume | 4.75 Litres | ## Product Details - **Brand:** North Spore - **Item Weight:** 2.27 kg - **Style:** Sterile substrate - **UPC:** 851555008931 ## Images ![‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore - Image 1](https://m.media-amazon.com/images/I/71UZ-9FQZGL.jpg) ![‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore - Image 2](https://m.media-amazon.com/images/I/71kz5wQRMfL.jpg) ![‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore - Image 3](https://m.media-amazon.com/images/I/51EQ0acpqeL.jpg) ![‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore - Image 4](https://m.media-amazon.com/images/I/51w-2+vdTfL.jpg) ![‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore - Image 5](https://m.media-amazon.com/images/I/715F5iDtowL.jpg) ## Questions & Answers **Q: how long can the substrate last in the bag?** A: Not long mine was green when it arrived. **Q: Do I just need this kit and a spore syringe to grow or would I need something different or additional?** A: You would want something like rye berries or straw depending on the mushroom. To inoculate with a spore syringe to colonize then mix in this substrate but if you have myceilium already colonized you would just mix it into this substrate. You wouldn't want to just inject this with spores, from my understanding. **Q: How long will this product last before use when stored properly? And what would be recommended storage if possible?** A: The sooner you use it, the better. Because it's a sterilized substrate, it will probably be fine for 6 months to a year. I'd keep it in a cool dry place. This is a good option and I've been pleased with the product. **Q: Where do I acquire a rye, vermiculite, pearlite substrate? Thanks** A: amazon, home depot, hydroponic store...... but if you are planning to add it to this substrate you would need to sterilize it. This bag is made to be used without adding anything to it ## Customer Reviews ### ⭐⭐⭐⭐⭐ It works *by N***K on 11 February 2026* ### ⭐⭐⭐⭐⭐ Best pre-pasteurized substrate I've found. *by T***E on 21 January 2023* ### ⭐⭐⭐⭐⭐ A little pricey, but worth it! *by C***S on 14 December 2025* ## Frequently Bought Together - ‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore - North Spore Organic Sterilized Hydrated Grain Bag w/Self-Healing Injection Port | Sterile Mushroom Spawn Bags w/ 0.2 Micron Filter Patch | USDA Certified Organic (1 Pack) - Myco Labs Premium 5-Grain Mushroom Spawn Bags | Sterilized Grain Spawn | Injection Ports | 2 Quarts Each Bag | 2 Bags per Box --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/453951439-boomr-bag-5-lb-manure-based-sterile-mushroom-bulk-substrate](https://www.desertcart.tn/products/453951439-boomr-bag-5-lb-manure-based-sterile-mushroom-bulk-substrate) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-07*