Other Gardens Trusts
The Gardens Trust
Buckinghamshire Gardens Trust
Cambridgeshire Gardens Trust
Cheshire Gardens Trust
Cornwall Gardens Trust
Devon Gardens Trust
Essex Gardens Trust
Gloucestershire Gardens Trust
Hampshire Gardens Trust
Kent Gardens Trust
Lincolnshire Gardens Trust
London Gardens Trust
Northamptonshire Gardens Trust
Somerset Gardens Trust
Surrey Gardens Trust
Sussex Gardens Trust
National Organisations
British Trust for Conservation Volunteers (BTCV)
East Anglian Garden Group
English Heritage
European Boxwood & Topiary Society
Folly Fellowship
Georgian Group
Henry Doubleday Research Association
The Linnean Society
Lutyens Trust
The Garden Museum
Plant Heritage
National Gardens Scheme
National Trust
Pulham Legacy
Royal Horticultural Society
Tree Register of the British Isles
Twentieth Century Society
Registered Parks and Gardens
Victorian Society
Woodland Trust