Dr. Michael A. Dirr is a horticulturist associated with the University of Georgia. Dr. Dirr has published over 300 scientific and popular publications and has authored seven books, including A Manual of Woody Landscape Plants: Their Identification, Ornamental Characteristics, Culture and Propagation and Uses. It has sold more than 250,000 copies.
Richard C. Webel is managing director of Innocenti & Webel LLC, a renowned firm that specializes in architecture, landscape architecture and strategic planning. He collaborated on A Landscape of Continuity: The Practice of Innocenti & Webel, published by Harvard University in 1997. In addition to presenting lectures throughout the United States, he has also appeared on CNBC and CNN.