Useful Links
Association of Gardens Trusts
BTCV [British Trust for Conservation Volunteers]
Campaign to Protect Rural England
English Heritage
European Boxwood & Topiary Society
Folly Fellowship
Garden History Society
The Garden Museum
Georgian Group
Garden Organic [Henry Doubleday Research Association]
Hertfordshire Association for Local History
Hertfordshire Record Society
Historic Houses Association
Luton Hoo Walled Garden
Lutyens Trust
National Botanic Garden of Wales
National Gardens Scheme
National Trust
Plant Heritage
James Pulham & Son
Royal Horticultural Society
Tree Register of the British Isles
Twentieth Century Society
UK Database of Historic Parks & Gardens
Victorian Society