Elizabeth (Leah) Diehl, RLA, HTM is director of the Therapeutic Horticulture Program at Wilmot Gardens at the University of Florida. She is a licensed landscape architect, a master gardener and a registered horticultural therapist. She has bachelor’s degrees in both architecture and art history from the University of Illinois-Chicago and a master’s degree in landscape architecture from the University of Pennsylvania. Leah began her work in horticultural therapy in Chicago in 1993, where she started a therapeutic and pre-vocational program for individuals with physical and developmental disabilities at Misericordia Home. She served as Editor-in-Chief of the peer-reviewed Journal of Therapeutic Horticulture from 1999-2014. Leah has taught landscape architecture, horticulture and horticultural therapy courses at several universities and colleges and is on the faculty of the University of Florida Department of Environmental Horticulture to develop and teach a new undergraduate certificate program in Horticultural Therapy. She has published more than 20 papers on horticultural therapy and therapeutic landscapes, including a chapter on healing gardens in Ecotherapy: Healing with Nature in Mind. She has provided numerous presentations on people-plant interactions in the U.S. and abroad.