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 | North Spore

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

Product ID: 148907055

Details

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

🌱5 lb premium sterile substrate

📈Optimized for maximum mushroom yield

🇺🇸Proudly made in the USA

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Description

🍄 Grow like a pro, harvest like a boss!

BOOST YOUR HARVEST - Formulated by expert mycologists to maximize mushroom yield with a proprietary manure blend.
TRUSTED BY THE PROS - Widely used and perfected over years by dedicated mushroom growers.
SIMPLE STORAGE HANDLING - No refrigeration needed; store at room temp and use sterile techniques for best results.
VERSATILE GROWING OPTIONS - Perfect for monotubs, filter bags, outdoor beds, or direct bag/tray cultivation.
READY TO USE STERILE SUBSTRATE - Pre-pasteurized and hydrated to field capacity for hassle-free growing.

The Boomr Bag is a 5 lb sterile, manure-based bulk substrate designed by mycologists to maximize yields of dung-loving mushrooms. Made in the USA with a secret premium blend of composted horse manure and supplements, it’s pre-pasteurized and hydrated for immediate use. Trusted by growers for years, it supports versatile cultivation methods and requires no refrigeration, making it the go-to substrate for serious mushroom cultivators.

Specifications

ASIN	B07TTV73RM
Best Sellers Rank	#35,607 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #356 in Garden Soil
Brand	North Spore
Brand Name	North Spore
Customer Reviews	4.3 out of 5 stars 1,215 Reviews
Global Trade Identification Number	00851555008931
Item Weight	5 Pounds
Manufacturer	North Spore
Style	Sterile substrate
Style Name	Sterile substrate
UPC	851555008931
Unit Count	80.0 Ounce
Volume	4.75 Liters

Reviews

N**K

11.02.2026

T**E

21.01.2023

C**S

14.12.2025

A**R

10.06.2025

C**H

10.10.2025

J**Y

24.02.2026

A**D

3.10.2025

S**Z

24.10.2023

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