We have found 14 plants that meet your criteria.

alpine clematis (group 1)
Clematis alpina alpine clematis (group 1) Delightful mid-blue, bell-shaped flowers in April/May £9.99 Buy
alpine clematis (group 1)
Clematis alpina 'Frances Rivis' alpine clematis (group 1) Eye-catching twisted mid-blue flowers £12.99 Buy
herbaceous clematis (Group 3)
Clematis heracleifolia herbaceous clematis (Group 3) Ideal for spilling over a wall £12.99 Buy
clematis (group 1)
Clematis macropetala 'Lagoon' clematis (group 1) Luxuriant deep blue flowers £9.99 Buy
clematis (group 1)
Clematis macropetala 'Wesselton' clematis (group 1) Lovely double, mid-blue flowers £9.99 Buy
clematis (group 3)
Clematis 'Betty Corning' clematis (group 3) Pale lilac nodding bells with a delicate fragrance £11.99 Buy
herbaceous clematis (group 3)
Clematis Blue River ('Zoblueriver') (PBR) herbaceous clematis (group 3) Much admired at Cheslea... £12.99 Buy
clematis (group 2)
Clematis Franziska Maria ('Evipo008') clematis (group 2) exceptionally free flowering £12.99 Buy
clematis (group 3)
Clematis Happy Birthday ('Zohapbi') (PBR) clematis (group 3) Dark flowers become paler as they age £14.99 Buy
clematis (group 2)
Clematis 'Lasurstern' clematis (group 2) Charming lavender blue flowers £9.99 Buy
clematis (group 1)
Clematis 'Multi Blue' clematis (group 1) Fabulous double lavender blue flowers £11.99 Buy
clematis (group 3)
Clematis 'Perle d'Azur' clematis (group 3) Stunning pale turquoise-blue flowers £12.99 Buy
clematis (group 3)
Clematis 'Arabella' clematis (group 3) Perfect for scrambling through shrubs £9.99 Buy
clematis (group 3)
Clematis 'Ascotiensis' clematis (group 3) Very Free flowering, Azure blue flowers. £9.99 Buy