At Mycopolitan, The Staff Uses Sustainable Methods To Grow Specialty Mushrooms For Restaurants, School Cafeterias And Home Kitchens In The Delaware Valley. They Assist Fledgling Mushroom Growers And Teach The Next Generation Of Scientists And Nature-lovers How To Work With Fungi. Their Substrate Originates From Local Saw And Flour Mills And, After It Yields Mushrooms, Returns To The Land As Soil. Mushrooms Are A Staple Of Pennsylvania Agriculture. Mycopolitan Is Philadelphia's Mushroom Farm.