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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.)
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.
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.)
Recommended add-ons
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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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Simple, Reliable & all with good vibes
I’ve been buying through North Spore for a while now and love everything about them! Supplies arrive on time, well-packed, are high quality, and any time I’ve had a question, they’ve answered quickly and professionally… not to mention that they’re just Good People! Love that!
Organic Sterilized Grain Bag with Injection Port
Brand new to mycology and this was my first purchase from North Spore. The bags came in a reasonable amount of time and so far so good! These are 12 days after inoculation, and they seem to be colonizing right on pace. Additionally, I learned about a veteran's discount after I made the purchase and North Spore's customer service refunded the overage without hesitation. I have also hit them up multiple times on chat about other items and let me tell you, their customer service is unrivaled. Just a wonderful experience working with this team thus far! Buy from North Spore with the utmost confidence!
North Spore
Jeff, thank you so much for this great review! We are so happy we have been able to help in your mycology journey so far. We are here if you ever need anything!
Bag's
Fastest shippers in the business
North Spore
Thanks so much for the kind words, Bruce! We try to be as speedy as possible!
BEST OF THE BEST
10/10
North Spore
So great to hear you're enjoying the products, Jonathan! Thanks so much for sharing!
Best millet blend ever. Best customer service period.
These North Spore millet bland grain bags are the truth. Never had a contam, never had an issue with any grain bag at all. On my first order the package was either stolen or diverted. I got a hold of north spore right away and they sent a new one out with very little questions and it arrived within 2 days! They took such good care of my situation and I will forever be a customer. Once I saw the colo rate on their bags compared to Midwest organics in a side by side (same strain, same LC syringe, and noc'd on the same day at the same time), north spore millet mix colonized 2x faster than the competitor and after the first break and shake things REALLY took off impressively. I stand firm behind their products.
North Spore
Wow, Remy! Thank you so much for the thorough review. We so appreciate customers like you, and are always happy to help! Don't hesitate to reach out if you ever need anything.