Organic Wheat Berries Mushroom Grain Spawn Substrate (5 lbs.)Grain Spawn Bag 5 lb. Bag Organic Hard Red Spring Wheat Berries These grow bags can be used to produce nearly any type of mushroom spawn. Bags are hydrated and sterilized via pressure cooker at 15 psi for 120 minutes and then shipped out within 12 24 hours. The bags are side gusseted, extra thick (6 mil) and come equipped with a 0. 2 Micron Breathable Filter and Self Healing Injection Port. In order to inoculate your bag you will need to obtain