- Home
- Sterile Substrates
- Organic Sterilized Grain Bag with Injection Port
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.
-
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.
-
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.
-
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.
-
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.
You may also like
- Reviews
- Questions
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!
Highest quality paired with expert preparation
It seems that these products get better every time. Yes you can DIY, but THIS product is what you get when someone has dialed it in after years of improving the process. It is well worth the investment.
North Spore
Wow, thank you Gonzo! We appreciate your business, and will be here for all of your mushroom needs.
Grain bag...
Simple, clean and fairly priced.
North Spore
Thanks for the great review, Bart! We really appreciate your support.
Awesome!
Made inoculation super easy!
North Spore
Thank you so much for the review, Kristen! We'll be here for all of your mushroom needs.
Great!
Made inoculation super easy and straight forward! Will be buying again!
North Spore
Hello Kristen! Thank you so much for your feedback! We really appreciate the positive review. Good luck with your grow!
Reliable and easy
These grain bags have been a consistently clean and quality product. When lazy folks like me want to skip the step of sterilizing their own spawn, you really have to put your trust in someone else… and Northspore is definitely trustworthy and reliable. Can’t put a price on trust! Worth the money. Packaged nicely and with care. They are all around superior over other mycology supply companies. 10/10 always recommend!
North Spore
We couldn't do it without customers like you, Jaymee! Please reach out if you ever need anything.
Sterilized grain bags
Always works. Have tried to go cheaper...always regret it and come back.
North Spore
We really appreciate your support, Kelly! Our team is here to help if you ever need anything.
Good Kit
Great. no contamination.
North Spore
Thanks for sharing, Jonathan! We're so glad everything is working out for you.
Easy to use.
This stuff is easy! Pre sterilized?! Heck yeah!
North Spore
Thanks, John! Our team is here if you need anything.
Northspore does it again!
Northspore never fails, and this grain bag lives up to their name. It is easy to use and I love the instructional info throughout their site for almost any of their products. I will always buy my supplies from Northspore. Thank you!
North Spore
Thanks so much, Charles! We couldn’t do it without customers like you. The team is here if you ever need anything.
User friendly
Fantastic product, great customer service, wonderful company.
North Spore
Thanks so much, Eric! We really appreciate the kind review.