We have found 96 plants that meet your criteria.

milky bellflower
Campanula lactiflora 'Pritchard's Variety' milky bellflower Masses of bell-like lilac flowers £6.99 Buy
New
Campanula sarmatica 'Hemelstraling' bellflower Elegant, upright flowerspikes £5.99 Buy
Crocus Special Offers
Californian lilac
Ceanothus thyrsiflorus 'Skylark' Californian lilac A haze of bright blue flowers in early summer NOW £8.99 Buy
Californian lilac
Ceanothus 'Autumnal Blue' Californian lilac Sky-blue flowers in late summer £12.99 Buy
Californian lilac
Ceanothus 'Burkwoodii' Californian lilac Bright blue flowers in summer £12.99 Buy
Californian lilac
Ceanothus 'Concha' Californian lilac Masses of deep blue flowers in spring £12.99 Buy
Crocus Special Offers
Californian lilac
Ceanothus 'Puget Blue' Californian lilac Fabulous deep blue flowers NOW £8.99 Buy
New
cornflower
Centaurea cyanus cornflower A vivid blue annual for a meadow £2.49 Buy
cornflower
Centaurea cyanus 'Black Ball' cornflower Wonderful near-black flowers £2.49 Buy
herbaceous clematis (Group 3)
Clematis heracleifolia herbaceous clematis (Group 3) Ideal for spilling over a wall £12.99 Buy
herbaceous clematis (group 3)
Clematis Blue River ('Zoblueriver') (PBR) herbaceous clematis (group 3) Much admired at Cheslea... £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 3)
Clematis 'Perle d'Azur' clematis (group 3) Stunning pale turquoise-blue flowers £12.99 Buy
globe thistle
Echinops bannaticus 'Blue Globe' globe thistle Large globes of dark blue flowers £7.99 Buy
globe thistle
Echinops bannaticus 'Taplow Blue' globe thistle Spherical, bright blue flower-heads £7.99 Buy
globe thistle
Echinops ritro 'Veitch's Blue' globe thistle Good for repeat flowering £7.99 Buy
New
viper's bugloss
Echium vulgare viper's bugloss Magnificent flowerspikes £2.49 Buy
sea holly
Eryngium × zabelii 'Jos Eijking' (PBR) sea holly Spiny metallic-blue flowers in late summer £8.49 Buy
sea holly (syn. Blue Dwarf)
Eryngium planum 'Blauer Zwerg' sea holly (syn. Blue Dwarf)... Dwarf variety with deep blue flowers £8.49 Buy