Darrell Frey is the owner and manager of Three Sisters Farm, a five-acre permaculture farm, solar greenhouse and market garden located in Western Pennsylvania. He has been permaculture teacher for thirty years, and is the author of Bioshelter Market Garden: A Permaculture Farm.
Michelle Czolba is co-owner of Pittsburgh Permaculture and co-founded the Hazelwood Food Forest. She has extensive experience in the design and maintenance of perennial polyculture.