Blue

Ajuga reptans 'Arctic Fox'

Common bugle, Carpet bugle, Sicklewort, Carpenter's herb

Ajuga reptans 'Golden Beauty'

Common bugle, Carpet bugle, Sicklewort, Carpenter's herb

Anchusa azurea 'Opal'

Large blue alkanet, Alkanet, Bugloss, Italian alkanet, Italian bugloss

Angelonia 'Angelface Wedgewood Blue'

Summer snapdragon

Aquilegia 'Swan Blue and White'

Columbine

Aquilegia vulgaris 'Adelaide Addison'

Common columbine, Granny's bonnet

Aster amellus 'Blue King'

Italian star-wort, Perennial aster, European Michaelmas daisy, Italian aster

Aster tongolensis 'Napsbury'

East Indies aster

Asyneuma campanuloides

Campanula-like asyneuma

Aubrieta 'Blaumeise'

Rock cress

Aubrieta 'Blue Beauty'

Rock cress

Aubrieta 'Blue Dawn'

Rock cress

Aubrieta 'Royal Blue'

Rock cress

Borago officinalis

Borage

Brunnera macrophylla 'Alchemy Silver'

Siberian bugloss, Greater forget-me-not, Heartleaf brunnera, Dwarf anchusa

Brunnera macrophylla 'Emerald Mist'

Siberian bugloss, Greater Forget me not, Heartleaf brunnera, Dwarf anchusa

Buddleja davidii Flutterby Petite Blue Heaven = 'Podaras 8'

Butterfly bush

Calibrachoa 'Million Bells Trailing Blue'

Trailing petunia

Camassia cusickii

Cusick's camass

Camassia quamash

Common quamash

Campanula cochleariifolia 'Bells Blue'

Fairy thimbles

Campanula garganica 'Hirsuta'

Adriatic bellflower, Dalmation bellflower, Gargano bellflower

Campanula glomerata 'Bellefleur Blue'

Clustered bellflower, Danesblood bellflower

Campanula longestyla 'Isabella Blue'

Long-styled bellflower

Campanula rotundifolia 'Olympica'

Harebell, Bluebell, English harebell, Scottish bluebell

Campanula wanneri

Ring bellflower, Wanner's ring bellflower

Campanula x pulloides 'G.F.Wilson'

Black hybrid bellflower

Catananche caerulea 'Major'

Cupid's dart

Ceanothus 'Blue Cushion'

California lilac

Ceanothus 'Cynthia Postan'

California lilac, Redroot

Ceanothus 'Dark Star'

California lilac, Redroot

Ceanothus impressus 'Cool Blue'

Californian lilac, Santa Barbara Ceanothus

Centaurea cyanus 'Midget Mixture'

Cornflower, Blue-bottle, Batchelor's buttons

Chaenorhinum origanifolium

Dwarf snapdragon

Clematis 'Denny's Double'

Virgin's bower

Clematis 'Fireworks'

Virgin's bower

Clematis 'Frankie'

Virgin's bower

Clematis 'Lady Betty Balfour'

Virgin's bower

Clematis 'Lord Nevill'

Virgin's bower

Clematis 'W.E.Gladstone'

Virgin's bower

Clematis Esme = 'Evipo048'

Clematis Wisley = 'Evipo001'

Virgin's bower

Clematis x bonstedtii 'Campanile'

Bonstedtia hybrid clematis

Convolvulus sabatius - dark-flowered

Ground morning glory, Trailing morning glory

Convolvulus tricolor 'Blue Ensign'

Dwarf morning glory, Annual morning glory

Corynephorus canescens

Grey hair grass

Crocus 'Flower Record'

Dutch crocus

Crocus biflorus

Scotch crocus, Two-flowered Scotch crocus