Some Mushrooms are most successfully grown in divided media like sterilized hardwood sawdust, straw, coffee grounds, or other agri-"waste". Grain Spawn is used to grow in divided media, often in 6' tall column bags.
Tree Oysters (Pleurotus ostreatus), 2 lb. Can be used to inoculate bags and containers of pasteurized hardwood sawdust, straw, or coffee grounds. A 2-lb. bag of grain spawn will inoculate about 30 lb. of dry substrate. Fruits at 60-75º F.