- Alliance for Historic Landscape Preservation
 - Inter-disciplinary professional organisation dedicated to the preservation and conservation of historic landscapes in all their variety, from formal gardens and public parks to rural expanses. - Cultural Landscape Foundation, The
- Nonprofit foundation dedicated to increasing the public's awareness of the importance and irreplaceable legacy of cultural landscapes.
- Garden History Society
- Promoting the study of the history of gardening, landscape gardening, and horticulture.
- Institute for Cultural Landscape Studies
- Dedicated to supporting the understanding and management of landscapes with a significant history of human use.
 Landscape Institute, The
- Chartered body for landscape architects in the U.K. Site features organisational structure, branches, policies, and a searchable database of registered landscape architects and practices.- Society for Landscape Studies, The
- Society holds conferences, seminars, and field meetings.
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