Fast colonizer never a contamination wow great yields thank you thank you the easiest best grain jars on the market, big time saver! If you've been using rice cakes then this is the next step you'll love the ease and the out come. With that confidence the 5 grain bages and casting is your next step and you'll be amazed at the size of your flushes. Midwest is only a call away with great products and answers to any questions. Thanks again Midwest Dominic

These jars are excellent. I’ve inoculated 9 of these jars with spore syringes and always had good, strong, fast colonization. No contamination, no problems. Shake them when they’re about 30% colonized and within a week they’ll be ready to go. I’ve had success with three different varieties, so they’re quite versatile. You won’t be disappointed.

I'm amazed at the process of this jar colonizing. It was the fastest I've experienced yet and the grains are clearly nutritional as the mycelium is beautiful

I used 6 of the spawn jars and every single one colonized 100% and are producing mushrooms right now.

I just got to say , not only are the products great ... Christine from MWGK is awesome and ready to share her knowledge ..Thanks Mwgk and thanks Christine