Ultimate ½ Pint Substrate Jars (12-Pack)
Ultimate ½ Pint Substrate Jars (12-Pack) is backordered and will ship as soon as it is back in stock.
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Ultimate ½ Pint Substrate Jars (12-Pack)
Description
Description
Ultimate ½ Pint Substrate Jars (12-Pack)
Freshly Made • Sterile • Fastest Colonization on the Market
(ON SALE!)
After over 15 years of refinement, we’ve perfected the art of substrate jars. Our Ultimate 8oz substrate jars are trusted by growers across the country for their consistent results, unbeatable colonization speed, and superior yield potential. This isn’t just another PF Tek jar—it’s a carefully balanced formula of:
- Organic Brown Rice Flour
- Vermiculite
- Mineral Water
- Liquid Worm Castings
- Bee Pollen
Each jar features four pre-drilled holes in the lid for easy inoculation and a top dry layer of vermiculite for contamination protection. We use Ball® 100% glass canning jars—never cheap plastic alternatives.
Why Choose Our Ultimate Jars?
- Fastest Colonization Times – Ideal nutrient balance promotes rapid, even growth
- Larger Yields – Formulated to produce healthy, robust mushrooms
- Sterilized to Perfection – Pressure sterilized for 120 minutes in our autoclave
- Pre-Drilled & Ready – Just add your favorite spore syringe or liquid culture
- Handmade Fresh – Each jar is made the same morning your order ships
No guesswork. No corners cut. Just reliable jars that outperform anything else on the market.
Included:
- 12x 8oz Ultimate Substrate Jars (½ pint size)
- Lids with 4 pre-drilled holes
- Sterile, ready-to-inoculate jars with dry vermiculite top layer
**Click here to read our update page about national canning jar shortages and pricing**
Let customers speak for us
Grain bags are great I wasn't happy with the agar plates because they weren't wrapped individually and you didn't send any para film I feel like you guys should replace the five agar plates that I got when I undid the main rapper the lids got Jarred around and they ended up contaminated all of them but one the one I called a mushroom with so out of the five I only was able to use one of them but other than that your business has been great I love every product of everybody I bought a grow kit from you guys a few years back but overall very happy with Midwest grow kits
Excellent product with 0% contamination. Amazing customer service.
Jars are working fine. The 5 lb bag got contaminated twice for the 44q monotub.got a replacement, but the 2nd one nothing.
Excellent service and great response time well worth your time to deal with this company
Bought 5 grain jar 32 oz innoculated with spores July 11th 30days later August 11th fully colonized mix with 5 lbs.casing mix put in 28qt monotub many mushrooms growing also I bought air filter patches and eco cleanse anti mold for misting shipping was super fast as always every thing arrived securely packaged
I’ve used these several times. I’ve never needed to do huge grows like some people do. These colonize fast with liquid cultures and out put nice flushes. I even resoaked them for a second flush.
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.
