Clematis 'Mrs P.T. James' offers amazing sky blue double and single blooms.

Clematis 'Multi Blue' is a stunning semi-double to double cultivar with blue to purple-blue tepals.

Clematis 'Nelly Moser' is more than 100 years old and still one of the most popular of all cultivars.

Clematis 'Niobe' has beautiful very dark ruby red flowers.

Clematis 'Paradiso' is a large flowering climber producing double and single reddish-violet flowers with darker margins.

Clematis 'Perle d'Azur' has long been a favourite of clematis enthusiasts with light violet and sky blue flowers in profusion.

Clematis 'Pernille' is a cold-hardy climber with single white flowers, purple margins and veining and yellow stamens.

Clematis 'Pink Champagne' is one of the earliest of all large-flowered cultivars to bloom with glowing purple-pink tepals with frosted bars.

Clematis 'Pink Fantasy' is hardy to zone 3 with beautiful white to shell pink flowers with a deeper pink central bar.

Clematis 'Prince Phillip' offers huge rich purple-blue flowers 8-10 inches wide with magenta central bands.

Clematis 'Proteus' is a historic cultivar with double and single blooms in shades of rosy-lilac.

Clematis 'Ramona' has lovely flowers in delicate tones of mauve and lavender-blue.

Clematis 'Red Star' is a Japanese cultivar that produces fully double red to magenta-red flowers.

Clematis 'Rhapsody' produces masses of 4-6 inch wide rich royal purple flowers with yellow stamens.

Clematis 'Romantika' offers a profusion of dark violet purple flowers with contrasting yellow stamens.

Clematis 'Rosalyn' is a cold-hardy climber with unique, semi-double, magenta-pink flowers.

Clematis 'Rouge Cardinal' offers glowing shades of red and burgundy red with brownish stamens.

Clematis 'Royalty' is a stunning double cultivar with rich purple-blue flowers.

Clematis 'Scartho Gem' has many overlapping mid pink tepals with magenta central bands.

Clematis 'Sealand Gem' has lovely, ruffled, 4-6 inch wide flowers in a rosy-mauve colour with mid pink bars.

Clematis 'Serenata' has rich dusky purple to purple-blue flowers with red central veins and yellow stamens.

Clematis 'Snow Queen' is an introduction from New Zealand with lovely white flowers.

Clematis 'Super Nova' is a cold-hardy climber with large, single white flowers, dark purple margins and veining.

Clematis 'Sweet Summer Love' is like a sweet autumn clematis with colourful flowers in shades of wine red and rich purple.

Clematis 'Sweet Summer Love' is like a sweet autumn clematis with colourful flowers in shades of wine red and rich purple.