Clematis Evison 'Rosemoor' offers rich fuchsia-red flowers with lavender-red central bands.

Clematis Evison 'Rosemoor' offers rich fuchsia-red flowers with lavender-red central bands.

Clematis Evison ‘Sally’ is a beautiful, free-flowering pink cultivar with deeper pink central bars.

Clematis Evison ‘Sally’ is a beautiful, free-flowering pink cultivar with deeper pink central bars.

Clematis Evison 'Samaritan Jo' has pointed petals in silvery pink with purple edging and dark purple and yellow centres.

Clematis Evison 'Samaritan Jo' has pointed petals in silvery pink with purple edging and dark purple and yellow centres.

Clematis Evison ‘Sarah Elizabeth’ is from the compact Boulevard series with distinctive, glowing almost salmon pink flowers.

Clematis Evison ‘Sarah Elizabeth’ is from the compact Boulevard series with distinctive, glowing almost salmon pink flowers.

Clematis Evison ‘Shimmer’ has large lilac-blue to lilac-purple flowers with a paler central bar. The flowers change to lighter blue as they age.

Clematis Evison 'The Countess of Wessex' has large, ruffled, white flowers with pink stripes and deep red stamens on plants just 4 feet tall.

Clematis Evison 'The Duchess of Cornwall' is a short, repeat bloomer with large single flowers of rich violet-blue.

Clematis Evison 'Tranquilite' has single, light blue flowers with white stripes, light yellow centers, and contrasting anthers.

Clematis Evison 'Tranquilite' has single, light blue flowers with white stripes, light yellow centers, and contrasting anthers.

Clematis Evison ‘Tsukiko’ has stunning ivory white flowers and dark purple stamens. It is extremely free flowering.

Clematis 'Vicki' has rich pink flowers with magenta-red central bands for a striking bicolour display.

Clematis 'Vicki' has rich pink flowers with magenta-red central bands for a striking bicolour display.

Clematis 'Volunteer' has lovely lavender-pink flowers with bold magenta central bands.

Clematis Evison ‘Zara’ produces lovely light blue flowers with central yellow stamens from spring to fall on stems 5-6 feet high.

Clematis 'Fair Rosamund' is one of the few large flowering hybrids with a fragrance. Bluish white with pink bar and purple stamens.

Clematis 'Fuchsia Flash' has large single flowers of reddish-pink with cream centres and maroon tipped anthers. Rebloomer. Hardy to zone 3.

Clematis 'Fuji Musume' is a beautiful Japanese cultivar with 6-8 inch wide mid blue flowers

Clematis 'Fuyu-no-tabi' is a Japanese cultivar with large, single, white flowers with red stamens. Re-bloomer.

Clematis 'General Sikorski' produces huge 8-10 inch wide flowers in shades of mid-blue to purple-blue.

Clematis 'Gillian Blades' is a stunning white cultivar with ruffled edges set against the central yellow stamens.

Clematis 'Guernsey Cream' has elegant creamy white flowers. One of the earliest to bloom of the large-flowered cultivars.