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

North Spore ‘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

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Details

Brand
North Spore
Global Trade Identification Number
Item weight
5 Pounds

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 (1,150)
Global Trade Identification Number	00851555008931
Item Weight	2.27 kg
Manufacturer	North Spore
Style Name	Sterile substrate
UPC	851555008931
Unit Count	2365.88 Milliliters
Volume	4.75 Liters

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