MushroomSupplies Grow Kit In-A-Bag - 5 LB - Case of 7This mushroom grow kit blend of sterilized grain and substrate contains everything growers need to grow mushrooms, just add spores or liquid culture! FEATURES: Injection port for reduced risk of contamination 0. 2 micron filter for optimal airflow Sterilized grain and substrate mix to meet mushroom nutritional needs Grow up to 3 flushes This grow kit includes everything needed to grow mushrooms just add spores or liquid culture! Every bag contains a