how long can the substrate last in the bag?

Not long mine was green when it arrived.

Do I just need this kit and a spore syringe to grow or would I need something different or additional?

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.

How long will this product last before use when stored properly? And what would be recommended storage if possible?

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.

Where do I acquire a rye, vermiculite, pearlite substrate? Thanks

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

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

Product ID: 292191030

Details

Brand
North Spore
Global Trade Identification Number
Item weight
5 Pounds
Style
Sterile
UPC
851555008931

🌱5 lb sterile manure substrate

📈Max yield formula by mycologists

🇺🇸Proudly made in USA

158878CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍄 Grow like a pro, harvest like a legend.

NO FRIDGE STORAGE - Store at room temp for months—convenience meets performance.
BOOST YOUR HARVEST - Scientifically crafted manure blend maximizes mushroom yield for serious growers.
TRUSTED BY THE PROS - Years of refinement and 1,100+ happy growers prove Boomr Bag’s reliability.
VERSATILE GROWING OPTIONS - Perfect for monotubs, filter bags, outdoor beds, or controlled grow rooms.
READY TO USE BULK SUBSTRATE - Hydrated to field capacity—just add spawn and watch your crop thrive.

North Spore’s Boomr Bag is a 5 lb sterile, manure-based bulk substrate engineered by expert mycologists to maximize yields of dung-loving mushrooms. Featuring a proprietary blend of composted horse manure and coco coir, it’s hydrated and ready for versatile growing setups. Trusted by over 1,100 growers since 2019, this USA-made substrate offers reliable, high-performance mushroom cultivation without refrigeration.

Specifications

ASIN	B07TTV73RM
Brand Name	North Spore
Customer Reviews	4.3 4.3 out of 5 stars (1,176)
Global Trade Identification Number	00851555008931
Item Weight	5 Pounds
Manufacturer	North Spore
Style Name	Sterile substrate
UPC	851555008931
Unit Count	2365.88 Milliliters
Volume	4.75 Liters

Reviews

B**D

The product is the best

Price seems to be in little inflated to make up for delivery. But excellent product.

26.08.2026

T**O

North Spore Rocks!

Great products and excellent customer service. Boomr Bag is like a shroom cheat code!

4.09.2026

J**R

Very disappointed

Thought this was suppose to be one of the best substrates out there to use. It takes time to grow and I’m using for personal use so I only do a few grow bags at a time. With in 6 months when I went to use I noticed bugs in my substrate. Now I kept indoors, I folded and clipped the bag tight when not in use and it was stored in the original bag, box in a closed cabinet. When I looked further I saw it was infested with gnat bugs and I felt like it was no longer usable for indoor use. It was over the return time so it was a complete waste of money on my end. If you’re using for a large grow at one time then it might be better but not in my case. I already disposed of it and did not take pictures because when I noticed this I just wanted to get it out of the house.

30.10.2024

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.

10.06.2025

C**E

Great product

Works great. 1st time doing this and it’s been a breeze

29.07.2026

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