Super fast shipping and a product second to none.

I've tried every kind of substrate and this is the best for most grows. I've only ever had one contamination with these bags and it was my fault. No fuss no muss with this bag design.

only place i will buy my substrate for mushroom growing. must try.

I’ve tried unsuccessfully on several occasions with bags. Seemed as they always had one issue or another. I ordered 8 bags from the new versions from their new autoclaves. Not only did I get all 8 to go they seem to be just as fast as the 24oz jars! Great job Midwest

I’m a monotub grower with 4 to 8 tubs going at any one time. These five grain spawn bags are what I’ve used for every grow, and they have never let me down! They are by far the best value on the web. You won’t find the same quality for anywhere near the price that Midwest grow kits offers.