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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North Spore 'Boomr Bag' Sterile Mushroom Bulk Substrate, Manure-Based, 5 lb

North Spore 'Boomr Bag' Sterile Mushroom Bulk Substrate, Manure-Based, 5 lb

Product ID: 453951439

Details

Brand
North Spore
Global Trade Identification Number
Item Weight
2.27 kg
Style
Sterile
UPC
851555008931

🌱5 lb sterile manure-based substrate

📈Formulated for maximum mushroom yield

🇺🇸Proudly made in the USA

Description

🍄 Grow like a pro with Boomr Bag — the secret weapon for next-level mushroom yields!

BOOST YOUR HARVEST - Scientifically crafted manure blend maximizes mushroom growth and yield.
TRUSTED BY EXPERTS - Years of refinement and glowing reviews from dedicated mushroom cultivators.
VERSATILE GROWING OPTIONS - Perfect for monotubs, filter bags, outdoor beds, or humidity-controlled setups.
LONG SHELF LIFE EASY STORAGE - No refrigeration needed; store at room temperature for months without losing potency.
READY TO USE STERILE SUBSTRATE - Pre-pasteurized and hydrated to field capacity for hassle-free inoculation.

The Boomr Bag is a 5 lb sterile, manure-based bulk substrate designed by mycologists to significantly increase yields of dung-loving mushrooms. Featuring a proprietary blend of composted horse manure, coco coir, and premium supplements, it’s pre-pasteurized and hydrated for immediate use. Trusted by growers nationwide, this USA-made substrate supports versatile growing methods and offers long shelf stability without refrigeration.

Specifications

ASIN	B07TTV73RM
Brand	North Spore
Customer Reviews	4.3 4.3 out of 5 stars (1,173)
Global Trade Identification Number	00851555008931
Item Highlight	Filter Patch Bag for Monotubs & Bulk Grows, Dung-loving Species, Mycologist-formulated, Made in USA
Item Weight	2.27 kg
Manufacturer	North Spore
Number of Packs	1
Style	Sterile substrate
UPC	851555008931
Unit Count	2365.88 Milliliters
Volume	4.75 Litres

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