Essential British Gardens: Clickable map to a guide to the finest gardens and arboretums in Britain. Plant nurseries with interesting garden displays included.
Gardening UK's Gardening Events and Open Gardens: County by county listing of gardening events and gardens open to the public in the UK (and elsewhere!).
Gardens Scotland: Guide to gardens and nurseries to visit in the North of Scotland. Also offer tours with an expert.
Gardens to Go: A guide to gardens in the South East of England with descriptions, photographs, and links.
Gateway Gardens Trust: Enables access to the historic garden heritage of Wales for a very wide range of groups for whom this has been difficult. Information on the scheme and how it works.
Great British Gardens: Listing and descriptions of gardens to visit in the south-west and south-east, with places to stay locally, details of facilities and contact.
Japanese gardens in the UK and Ireland: Offers a searchable database of Japanese Gardens in the UK and Ireland, with photos and visiting details.
Scottish Gardens: A selection of Scottish gardens to visit, listed by county.
The National Garden Scheme: Information on over 3300 gardens open for charity, with maps. Over £1.5 million was raised in 2001; update on how the money was spent, and how to join the scheme.
The uk.rec.gardening Web Ring.: Links web sites of uk.rec.gardening subscribers with pages devoted to their own gardens. No commercial or "vested interests".
UK Database of Historic Parks and Gardens: A developing project at the University of York. The data is indexed by place, local authority, by type, and even by people associated with the site. Contact information available.