Welcome to our webiste! Find 100% organic BRF substrate jars for all your mushroom growing needs. Jars are manufactured using only the best ingredients consisting of organic brown rice flour, vermiculite and sterilized water. Our products are 100% sterile guaranteed, and are ready to inoculate upon arrival. We now offer all our loyal customers a rewards program that allows you to get great discounts and even free jars!! Please feel free to contact us if you should be in need of any assistance as our Mushteks are here to help your grow achieve results. Thanks for stopping by!