About this item. HIGH YIELD SUBSTRATE: A proprietary mix developed by our team of mycologists. Fortified with all the nutrients your mycelium needs to mature from spore to fruiting mushrooms. Contains the perfect ratio of Premium Manure, Vermiculite, Coco Coir, and Gypsum.. PERFECT FOR MEDICINAL AND DUNG-LOVING MUSHROOMS: This substrate will provide all the nutrients your mycelium will love!. 100% RISK FREE: With our proprietary sterilization process, hospital-grade sterility testing, and batch-tracking system, we guarantee your satisfaction or your money back!. HOW TO USE: Mix 5 LBS of substrate for every 3 LBS of colonized grain (sterilized grain sold separately). HIGH YIELD SUBSTRATE: A proprietary mix designed by mycologists that allows the mycelium to thrive by offering the proper amounts of water content and nutrients that mycelium loves: Soybean Hull Coco Coir Vermiculite Gypsum Comes in a lab-quality 0.5 micron filter bag that allows for the perfect air exchange while keeping out unwanted contaminants. PERFECT FOR MEDICINAL AND GOURMET MUSHROOMS: Whether you are growing lions mane, oyster, medicinal mushrooms, or many other species of mushrooms, this substrate will provide the nutrients your mycelium will love! HOW TO USE: When mixed with a colonized Millet Grain Bag, your mycelium will be supplied with all the nutrients it needs to thrive and mature into fruiting mushrooms. Make sure to check out our Sterilized Grain Bag for your colonization needs! PROPRIETARY PASTEURIZATION PROCESS: Pasteurization is all about keeping good nutrients alive while killing bad contaminants. Substrate doesn t function well if it is completely sterilized because sterilization kills beneficial nutrients mycelium relies on as a nitrate source. Our proprietary pasteurization process creates a substrate with the perfect amount of nitrates and nutrients to ensure a successful grow.