Learn About Our Landscape Architecture Company Based in Blue Bell, PA, SED Design has been providing top-notch landscape planning and design services for more than 18 years. We were one of the first firms to take an ecological approach towards landscaping.The study and evaluation of environmental conditions, cultural influences, historical impacts, and user needs are the stepping stones of our design strategy. We use research and analysis to reveal the inherent and unique qualities of sites so they may be utilized and enhanced. This approach establishes a scientific basis for the restoration of natural systems and is also a vital design component.We believe that landscape design should integrate creative and scientific processes to produce exceptional work. This approach contributes to environmental health by restoring life and sustaining the balance of our planet's fragile ecosystems.SED Design brings innovative solutions to each project. Our firm's public landscapes and private gardens integrate design with low-impact and green principles to meet the programmatic needs of each client. Our Mission SED Design is dedicated to the creation of distinctive and evocative spaces in the context of the expansive landscape. About Our Founder Edgar David, RLA, founder and principal landscape architect for SED Design, specializes in landscape architecture, ecological restoration, and planning. His primary goal is to establish a mutually beneficial relationship between the individual and the landscape that surrounds them. From 1990 to 2002, Edgar David served as a tenured professor of landscape architecture in the Department of Landscape Architecture and Horticulture at Temple University. He taught courses in field ecology, landscape restoration, ecological management, and landscape architectural design.