- Sterile Substrates
- 8-Pack Organic Sterilized Grain Spawn Bags
8-Pack Organic Sterilized Grain Spawn Bags
|Certifications||USDA certified organic|
|Media||Organic grain mix|
|Moisture content||Hydrated to a target of 50%|
|Carton size||8 bags (24 lbs)|
|Bag weight||3 lbs each|
A $176 value!
Our best-selling organic sterilized grain spawn bag was formulated by mycologists to maximize the speed and size of your mushroom grow. Each spawn bag contains our proprietary 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.
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.)
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.
North Spore grain spawn bags are sterilized in a commercial-grade autoclave. Sterility is verified using biological indicators and temperature sensors.
Looking for single bags? Click here.
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 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.
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These are my go to grain bags never had any issues with contamination. North Spore has some awsome products. I will continue to use these grain bags and many of there other products.
Beginner feeling like a PRO!
First time growing & I did a ton of research beforehand. SO GLAD I went with North Spore! Ordered 1/2 & delivered 1/16 Detailed & easy instructions + video - more on NS YouTube! Inoculation on 1/16 - first photo. Easy to do thanks to NS! Basically just sterilize & stick in spore syringe. Only issue I had overall was with the needle plugging - not a big deal. 2/8 - 2nd photo. So far so good! My babies are looking great :) 2/15 - 3rd photo. Almost ready for colonization on 1st bag, 3 & 4 are not far behind, 2 is a bit slower but I did mix it a few days later than the others. Waiting for first flush before I use the other 4 bags. Quality product & company - I will be back! Thanks, North Spore :)
After receiving the grain bags I massaged the bags to redistribute the moisture they were a big help
No prob. No buts. I’d do it again. Please clean up was easy.
North Spore makes amazing products, and this eight pack of grain spawn is nothing less. Everything arrived quickly, without any hassle, and in beautiful condition. These grain spawn bags have perform so well, time and time again the only results I have gotten are fantastic. I couldn’t rate this product any higher or offer any recommendations for improvement. The company is an absolute joy to work with. Perfect products, timely delivery, and customer service beyond the pale. Thank you North Spore.
It will take awhile to work Thur it but everything is looking good so far