In 1992 France established a national collection of clematis at the famous Bagatelle Garden in Paris under the auspices of the City of Paris. The present collection of 173 clematis will increase in number and contains a wide range of species and cultivars, as well as conservatory clematis. This garden is open throughout the year and is situated at Avenue de l'Hippodrome, 75116, Paris.

In Germany there is a clematis collection at the Botanical Garden of Dortmund. Address: Botanicher Garten, Dortmund-Brunninghausen, Germany. This garden is open throughout the year.

In Italy the marvellous Villa Taranto at Pallanza on Lake Maggiore holds a small collection of clematis.

The United Kingdom has three national collections of clematis but two are not readily available to the public. A third is open to the public at Treasures of Tenbury, Tenbury Wells, Worcs., WR15 8HZ. In addition to many private collections, a focal point for all clematarians is the beautiful Sissinghurst Gardens of the National Trust. The Sissinghurst Castle Garden is situated at Sissinghurst, near Cranbrook, Kent and is open 2nd April-15th October. For visitors passing through London there is an interesting collection held in one of the London squares - Eccleston Square, behind Victoria Station. In Scotland, the Royal Botanic Garden, Edinburgh holds a collection at its main and associated gardens.

In Ireland there is a collection at the National Botanic Garden, Glasnevin, Dublin.

In the USA three collections are well-established. 1. A collection was started in 1983 at the Jane Watson Irwin Garden of the New York Botanical Garden, Bronx Park, Bronx, New York. 2. A collection at the United States National Arboretum in Washington 25, DC. 3. An expanding collection at the Chicago Botanic Garden.

See: Howells, J. 1996. The Rose and The Clematis as Good Companions. P.196.