Check the listing for details. Sterilized Rye Berry Grow Bag (5lb). Listed at 18.75 USD. Out-Grow's 5 lb Sterilized Rye Berries Mushroom Substrate is expertly prepared to promote vigorous mycelium growth. Each bag contains premium rye berries that have been thoroughly hydrated and sterilized, ensuring a nutrient-rich environment for your mushroom culture. The mushroom grow bag is designed with a self-healing injection port and a 5-micron filter patch, providing optimal conditions for gas exchange and preventing contamination. For use, simply inoculate the bag with 10-12 cc of your chosen inoculate. Rye berries are renowned for their ability to support dense and robust mycelial networks, making them a popular choice among mushroom cultivators. To achieve the best results, use the substrate fresh. However, if storage is necessary, the bag can be kept in its original packaging in a cool, dry place for up to one month. Whether you're a novice grower or an experienced mycologist, Out-Grow's sterilized rye berries substrate offers a reliable and efficient solution for successful mushroom cultivation.