Mushroom Spawn Grain Bags | Midwest Grow Kits

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Premium 5-Grain Spawn Bags

(523)
$2500
Taxes, discounts and shipping calculated at checkout.
Our best-selling 5-Grain Spawn Bags feature a proprietary blend of grains and fortified hydration for faster colonization and stronger flushes. Sterilized and ready to use, each bag includes a filter patch and self-healing injection port for error-free inoculation.


Description

Premium 5-Grain Spawn Bags (2-Pack)

2.25–2.5 lbs Each | Self-Healing Injection Port | Fast Colonization

Our Premium 5-Grain Mushroom Spawn Grain Bags have remained a customer favorite for over a decade—and for good reason. Designed for speed, consistency, and superior performance, each bag contains our proprietary mix of five grains, fortified water, and a mineral-rich Calcium+ blend to support vigorous growth through multiple flushes.

Whether you’re a beginner or advanced researcher, these bags are ready to deliver exceptional results—sterilized, sealed, and prepared for effortless inoculation.


What’s Included

  •     2 x 5-Grain Spawn Bags (2.25–2.5 lbs each, ~2 quarts)
  •     10T 3mm Polypropylene Bags with 0.22 micron filter patch
  •     High-temp self-healing injection port for easy spore or culture application
  •     Step-by-step photo grow guide + advanced bulk grow instructions

Why Our 5-Grain Mix Works Better

Our custom blend begins with rye berries and is enhanced with Red Sorghum, White Sorghum, Millet, and other grains selected for:
✔️ Maximum surface area – more inoculation points = faster colonization
✔️ Strong nitrogen profile – supports up to 4 flushes
✔️ Non-clumping – grains are soaked, simmered, and dried to perfection
✔️ Fortified hydration – blended RO + mineral water, gypsum, Calcium+, and DAP for balanced pH and nutrient-rich environment


Sterility & Quality Control

Each batch of 600 bags is autoclaved at 18 PSI for 180 minutes, minimizing human error and ensuring total sterility. Bags are guaranteed to arrive clean and ready to go—just inject 3–5cc of your favorite grain or dung-loving spores.


Performance Highlights

  •     10+ years of proven results
  •     Massive flushes with excellent size and density
  •     Compatible with all mushroom strains
  •     Trusted by beginners and bulk growers alike

Customer Reviews

Based on 523 reviews
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J
Jo
Highly satisfied

Clean bags and fast shipping. Will definitely be using y’all again.

A
Amy Nall

Always a success with these!

A
Anonymous

Good grain bags. I've used 3 times now.

A
Andrew Salmiery
Thanks.

This was my 6th or 8th order and only had one item that there was trouble with and you didn't hesitate to make good of it.
I believe that I will stay a loyal customer.

Z
Zachary C.
Very fast; healthy

It came; I inoculated. Week and half later, solid white on bottom and spreading! Very good bags (and contents)