Nigel Dunnett is a senior lecturer in the landscape department at the University of Sheffield, where he has developed innovative research programs on naturalistic and ecologically-informed planting for gardens and public landscapes. He promotes urban environments that are rich in vegetation and nature in his teachings and research - combining his background and experience in both horticulture and ecology. Nigel's teachings covers planting design, landscape ecology, ecological design and management, and research methods for students. He is director of the graduate research school, coordinator of the degree for landscape design with ecology, and is actively involved in consultancy and advisory work, particularly in relation to the planting and design of green roofs, and in designing and creating "pictorial meadows." He writes regularly as a horticultural journalist for a range of landscape and garden publications, including Gardens Illustrated and The Garden. For the past ten years he has worked to apply ecological techniques in mainstream urban landscape contexts. He resides in Sheffield, England. Andy Clayden is a landscape architect, garden designer, and lecturer in the Department of Landscape at the University of Sheffield, England. He lectures in design, landscape construction, and design detailing. His work as a designer and researcher focuses on the application of new technologies and approaches to the creation of sustainable design solutions. He lives in Sheffield with his family.