The Original Rye Spawn Bags
The Original Rye Spawn Bags is backordered and will ship as soon as it is back in stock.
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The Original Rye Spawn Bags
Description
Description
The Original Rye Grain Spawn Bags (2-Pack)
Classic Performance. Superior Nutrition.
Trusted since the 1970s, our Original Rye Spawn Bags are the gold standard for serious cultivators. Each bag is packed with over 2 quarts of nutrient-enhanced organic rye berries—hydrated to perfection, pH-balanced, and fortified with essential minerals for vigorous colonization and multiple flushes. Rye grain’s naturally high nitrogen content outperforms millet-based alternatives, offering extended life and better 2nd and 3rd flushes.
What’s Included:
- 2 Original Rye Spawn Bags (2.25–2.5 lbs each)
- Cereal-grade rye berries, mineral water, gypsum, and nutrient-enhancing herbs
- Self-healing high-temp injection ports for easy, sterile inoculation
- 3mm Polypropylene bags with 0.22 micron filter patches for gas exchange
- Step-by-step photo guide + how-to videos
Why Choose Our Rye Spawn Bags?
-
High Nitrogen for Long-Term Performance
Rye supports stronger colonization and longer fruiting cycles compared to millet. -
Super-Hydrated & Sterilized for Purity
We use a custom hydration and air-drying method followed by industrial autoclave sterilization at 20–22 PSI for 180 minutes to ensure every bag arrives 100% contamination-free. -
Mass Production Ready
These are some of the largest spawn bags available—perfect for large yields or bulk substrate use. -
Reliable Inoculation Setup
Each bag features a built-in filter patch and high-mounted injection port for seamless, contamination-resistant use.
Pro Tip:
Inject 3–5 cc of your favorite grain or dung-loving spores directly into the injection port, then incubate alongside your jars. For advanced growers, we include an additional step-by-step guide for bulk spawn methods.
Let customers speak for us
Jars came as described. I would buy again.
Well I bought one and a week later I bought another one and a week after that I bought another 😂 so I have 3 stacked up on each other and they work amazing!
For the price I thought it was going to be small, but its not. Its a great deal. I grow for personal and it gets the job done. There's more than enough space for what I need it for. I included a picture with a cigarette light for a frame of reference to the size
Awesome and easy to setup/understand how everything works
These little jars were great for turning spores into ready to use mycelium culture. I could see the spores germinating with in 4 days after I added spores. I can’t wait to use the mycelium when it’s ready!
5 grain spawn jars
Horse Manure Substrate
Cow Manure Substrate
Good stuff✌🏻
Good stuff i prefer the 5 pounders because then i have no left over substrate but for my bigger tubs the 7.5 lb bags are the answer
Just what we needed, worked great, and saved a little putting on our own injection ports
Fast shipping! I’m always satisfied with my purchases. I have been quite successful transferring the bags into a small monotub. Will continue to be a customer. NOT a paid review! 🙅🏻♂️
I was needing something with amuch smaller footprint the bigger tubs were getting in the way a lot. The only gripe I ever have is that the Midwest growkit systems always come with these weird detachable handles that look like something that a dog would like to chew up, or would be easy to misplace... Other than that love you guys, last month I got the Spore culture bottles 30 ml and expanded my pleurotus eryngii culture
It's awesome being able to do microscopy in mycology at home just because I'm weird.
Very easy to use and set up. Yield is as advertised. This is my new go to grow method.
Man I am excited greatly!!!!! Ahahahahhhaahahaha
New to Research, heard complaints of other Company's all-in-one bags getting Contaminated, many recommended Midwest. I know my process wasn't perfect and your bag made it to fruiting. Maxing out Strain size and shape, matching strain descripton and color. Ordered 5 more bags and 2 heating mats.
Ive ordered upwards of 50 bags of this substrate and only had 1 issue so its safe to say this is a quality product every bag has usherd in a succesful flush of my favorit strains so buy it
I’ve used several heating/seedling mats over the years and this beats them all. Great temperature adjustability. Like most heating mats a dish cloth between the mat and tub helps. A heavier full tub will run a little hotter than an empty/light tub. A great investment…especially if you live in colder climates
