Midwest's Select Bulk Substrate Casing Mix - 7.5 pounds
Midwest's Select Bulk Substrate Casing Mix - 7.5 pounds is backordered and will ship as soon as it is back in stock.
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Midwest's Select Bulk Substrate Casing Mix - 7.5 pounds
Description
Description
Midwest's Select Bulk Substrate Casing Mix – 7.5 Pounds
Pasteurized • Hydrated • Ready to Use
Take the guesswork out of bulk mushroom growing with Midwest’s top-selling Select Bulk Substrate, now available in a convenient 7.5 lb bag. Specially crafted for grain or dung-loving mushrooms, this premium mix is fully hydrated, pasteurized, and ready to use right out of the bag—perfect for monotubs, totes, or container grows.
Designed for the popular bulk or monotub method, our Select Bulk Casing Mix blends all the essential elements for successful fruiting—no measuring or mixing required.
Ingredients Matter
Our proven recipe includes:
- Coco Coir – Naturally mold-resistant and beloved by mushrooms
- Vermiculite – Adds moisture retention and aeration
- Gypsum & Hydrated Lime – Balance pH and boost structure
- pH Buffers & Stabilizers – Maintain a consistent, grow-friendly environment
- Mineral Water – Enhances hydration with added micronutrients
- Select Additives – To resist mold and bacteria while supporting strong colonization
We pasteurize, not sterilize—preserving the natural antimicrobial benefits of coco coir for enhanced contamination resistance.
Product Highlights
- 7.5 LB Pre-Hydrated & Pasteurized Bag
- Perfect for 30–44 QT Containers & Our Grower’s Select Monotub
- Shelf Life: Up to 6 Months (Fridge/Freezer Storage)
- Field Capacity Achieved – Just open and mix with your fully colonized spawn
- PDF Bulk Grow Guide Included
The Midwest Advantage:
We’ve spent years perfecting this formula, and it continues to be our #1 selling product every month. Whether you're fruiting spawn bags, grain jars, or a monotub setup, our Select Bulk Substrate ensures reliable, robust growth and helps resist contamination better than any competing blend we've tested.
Let customers speak for us
Man, this kit just makes life easy. Everything came fresh, clean, and ready to use — no stressing, no sketchy prep work, just straight to growing. The totes are low-key perfect for keeping things smooth, and the heater keeps the temps steady without me having to babysit. Setup was quick, and the instructions walked me through without any guesswork.
What really hit me is how stress-free it is. Mycelium took off, no contamination, and it’s been all good vibes watching it do its thing. If you want to keep it simple but still get solid results, this kit’s the way to go. Midwest kept it real with this one — chill, reliable, and worth every penny. ⭐⭐⭐⭐⭐
The Tabletop Ecosphere was straightforward to set up, with clear instructions that made the process quick and hassle-free. The build quality feels solid, and the automatic humidity control worked exactly as described, keeping conditions steady without much attention on my part. I was able to start fruiting my mushrooms within days, and the results were healthy and consistent. While it’s not a huge chamber, it’s perfect for small-batch grows and fits nicely on a countertop or shelf. Overall, it’s a reliable and well-designed unit that makes mushroom cultivation much easier.
Love it! High Quality - Doesnt fade!
I always air-dry my mushies with a fan, I was looking for something besides plates to use when harvesting my tubs. This tray is perfect, when you place this tray on a flat surface like a counter the bottom can still get air and my fan works perfect drying all parts of the mushrooms without having to rotate everything as often. This is a great buy if you already buying other stuff in your cart as the Free Shipping makes this a deal!
I got the 45 dollar all in one bag with monotub and their tubs are the best, their all in one bags are the best and cheapest, amd their substrate is the best with more mushroom growing ingredients than the competition..
I am going to buy the jars next so I can reuse for liquid culture,bag of substrate and 2 monotubs bc their tubs work wonders compare to modified bins. Simply the best in the business.
Me…I’m the dummy. I struggled with maintaining humidity in my diy monotubs. The holes were never the right size or in the right place. Not with these. Perfect humidity. And I love the clamps. It’s like a child proof lock for me, warning me not to open until ready! Very well made. I wish I had found these sooner.
I just used your sterile injection pack with great success !😎😊thanks again will recommend Midwest grow in the future😎🔥💯
Easy to set up. Works as intended. Cleaner air and feel safer knowing it disinfected the surrounding surface area.
Got it quick...and about a week later they were pinning. The week after that I was eating them.
Never have a problem with thus substrate and ive purchased MANY bags of it always good moisture levels alaways contam free always quality
My order of the substrate arrived on time and was put work right off.(I had a spawn bag already i occulated and ready.
Just colonizing now.
All went well and may use again
I am so happy with this mushroom kit. it has been everything i wanted. Thank you. This is a must buy
I used three different strains and they are all doing great, at the end of the first day its possible to see development if your got strong enough genes, very healthy after transfer aswell!!!
Easy to set up and everything seems to be populating nicely. Very excited
