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Organic Sterilized Grain Bag with Injection Port
Certifications | USDA certified organic |
Moisture content | Hydrated to a target of 50% |
Bag weight | 3 lbs |
Our best-selling organic sterilized grain spawn bag was formulated by mycologists to maximize the speed and size of your mushroom grow. (All that's required is a spore syringe or liquid culture!)
Each spawn bag contains our proprietary grain blend featuring hydrated, nutrient-rich, organic millet and wheat berries. Bags also include a self-healing injection port for use with a spore or culture syringe plus a 0.2 micron filter patch to block airborne contaminants while providing even gas exchange. (Note: Color of injection port may vary.)
Recommended add-ons
Spawn to bulk ratio
We recommended 1 lb of colonized grain spawn for every 5 lbs of manure or hardwood sterile substrate. We also recommend using 2.5-5ccs per 3 lb injection port bag. (See Inoculation and Colonization below for full details.)
Why millet?
Millet has a much lower endospore load than rye and wheat, making it less prone to contamination. And its small size means your spawn will have many more inoculation points for the same volume of grain. By using millet, the mycelium will spread more evenly and abundantly through the substrate. And, as a high-nutrient medium, it also encourages rapid mycelial expansion.
Sterilization
North Spore grain spawn bags are sterilized in a commercial-grade autoclave. Sterility is verified using biological indicators and temperature sensors.
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To inoculate the grain bag, simply inject your spore or culture syringe through the port in a sterile location. We always recommend clean hands and latex or nitrile gloves to reduce the introduction of contaminants.
It is best practice to wait a minimum of 1 week after arrival before injecting grain bags to ensure they were not compromised during transit. Rest assured that your purchase is 100% guaranteed. If your bag was compromised, we will replace it.
We recommend using 2.5-5ccs per 3lb injection port bag. We do not typically recommend using an entire syringe in one bag. Doing so adds excessive moisture which can create over saturation in the bag. This over-saturation can pool and is prone to being anaerobic and the mycelium will have a hard time colonizing.
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Allow your bag to colonize in a cool location out of direct sunlight. Temperature for incubation shouldn't exceed 75 degrees F or dip below 55 degrees F. After a couple weeks, you should start to see mycelium growing on the grain.
You'll notice the white mycelium growing outward from the injection point. When it has grown three to four inches you should, without opening the bag, carefully break up the colonized grain and mix it into the uncolonized grain. This will dramatically speed up the colonization process.
When the bag is completely white with mycelium your spawn is ready to use. This may take a couple weeks to a month or more depending on the species and vigor of your culture.
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Grain bags should be stored at room temperature out of direct sunlight. No refrigeration is necessary. They can also be stored for several months before use.
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North Spore's products shall only be used for lawful purposes. North Spore does not condone hallucinogenic mushroom growing in jurisdictions where it is illegal.
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Perfect!
I've had a good experience every time I've used North Spore grain bags. ☺️
Quick & clean
Product arrived quickly. I had no issues with inoculation or colonization.
North Spore
Thanks for sharing, John! If you need help with anything, please reach out.
Grain bags
Excellent each and every time!
North Spore
We're so glad everything is working out for you, Paul! Thanks for the great review.
Wonderful product
Always a great product!
North Spore
Thanks so much, Michael! Our team is here if you need anything.
Bag was not sealed properly
The bag was ripped there for contaminated was unusable had to order another one
North Spore
We are so sorry you had an issue with your bag! We 100% guarantee replacements for any product that arrives damaged or contaminated. Please reach out to our customer service team at info [at] northspore.com and they will send you a new grain bag!
Perfect
Couldn't ask for anything better
North Spore
Thanks, Chris! Our team is here if you need anything!
Best grain hands down
Populates so quickly and doesn’t seem to be too moist
North Spore
Thanks, Ramon! Please reach out if you ever need anything.
Excellent
Excellent product. Works well
North Spore
We're so glad everything is working out for you, Daniel! Please reach out if you ever need anything.
Great product
It shipped fast and the mycelium grew really fast and customer service is great
North Spore
Thanks for the great review, Justin! If you need help with anything, please reach out.
Works well MOST of the time
Usually, it works, but on my order before this, I had 5 bags that didn't work. They have a stale smell coming from them and the rice turned a more intense color. Haven't used other similar products from other companies so I have nothing to compare it to.
North Spore
We appreciate your honesty and would love to make this right! Somebody from our team is reaching out to you via email now to assist you with the issue.