The National Dahlia Collection

 The National Dahlia Collection, order online. The Collection consists of over 1700 named varieties and species and is the only Dahlia Collection registered with the National Council for the Conservation of Plants and Gardens here in the UK. The Collection is owned and managed by Winchester Growers - a major UK horticultural company.

In the UK The National Dahlia Society issues a Directory of Dahlias with nine Varieties relating to flower and petal formation. Each variety is sub divided into Classifications according to flower sizes.