North SporeOrganic Sterilized Hydrated Grain Bag w/Self-Healing Injection Port | Sterile Mushroom Spawn Bags w/ 0.2 Micron Filter Patch | USDA Certified Organic (1 Pack)

The only grain I will buy. Nice and tightly packed with fresh hydrated and sterile millet. I inoculated it with a spore syringe from a reputable supplier. Set the temp to 77, and let it sit in the dark cozy closet. I was careful to minimize possibility of contam. Sprayed the bag all over w alcohol first thing. Applied fire to the syringe. Sprayed the grow room w isopropyl alcohol too. You cant do too much sterilizing. Use sterile gloves if you have them. Mycelium noticeable in a week. Spreads rapidly. After the second week, I had about 2 pounds of pure, fresh fluffy mycelium. Went on to grow the biggest flush ever in a monotub. Happy growing!

Always great stuff from this company. I have always been 100% satisfied with all north spore products.Could cost less tho

Good quality and product was fresh.

I recently tried the North Spore 3lb bag of sterilized grain, and it has been a great addition to my mushroom cultivation setup. The grain arrived in perfect condition, well-packaged, and ready to use right out of the bag. The sterilization was spot-on—no contaminants, which is crucial for a successful grow. The quality of the grain itself is impressive; it's consistent and works well with my mushroom spore syringes. Overall, this product offers excellent value for the price and performs as advertised. Highly recommend it for anyone serious about growing mushrooms at home.

Constant contamination. I've used North Spore for over a year, and more often than not, it's already contaminated. Tons of wasted time an money here. I would recommend Sterilizing your own grain and substrate and staying away from this.

Although these work well. Just be careful not to mishandle it. The bags can break from too much movement or pressure. By type of hole in the bag, renders the whole thing dead. Contamination is a pain. So, these work great. I recommend a small clean air sterilized room to inoculate.

This was my first attempt at growing mushrooms. I have still not learned my lesson - always read the directions! So I set the bag on a 80 degree F mat for 2 weeks before inoculating it. Then I injected 10 cc of spores (too much) and accidentally turned the heat mat up to 100 degrees overnite. Then I turned it down to 80 again and waited 2 weeks. Only a tiny bit of mycelium growing. I got impatient & kneaded the bag completely, found there were a few golfball sized clumps of mycelium. I waited another 2 weeks, there seemed to be about 1/3 diffuse mycelium so I broke it all up again & turned the mat down to 75 degrees. After 2 weeks I turned it down to 70 and now 10 days later it looks like most of the grain has mycelum but it isn't all interconnected like people show on their YouTube grow channels. I wonder if I have inadvertently frightened the mycelium into a state of severe cautiousness, not knowing what will happen next. I hope that if I just stop messing with the bag, let it sit in cool dim space the mycelium will eventually realize it's ok to grow again. There doesn't seem to be any contamination, there is still moisture in the bag, I can smell that earthy mushroomy smell from the filter area. I got a grain bag from another company, inoculated & handled the same exact way and it is now fully myceliated & ready for the next step. I will try making my own grain growing material in the future to try & save a few bucks. - I Should Have Read The Directions First!

Isn't quiet ready yet. Spores germinated great just waiting to see what happens. No contamination. Seems to be a good product