Plug spawn, available for shiitake only, is discounted in quantities of from 10,000 to 50,000 or more plugs. Sawdust spawn for all species and strains is discounted in quantities of from 10 to 20 or more 1-kg bags. To place an order for bulk spawn, please call us at toll-free 866-521-1555, 11 to 5 Central Time, Monday through Friday. For large orders, we charge the actual shipping cost, which we will be able to estimate when you call or email us.