Blue

Aconitum 'Bressingham Spire'

Monkshood, Aconite

Aconitum x cammarum 'Bicolor'

White-blue monkshood, Hybrid monkshood

Agapanthus 'Purple Cloud'

African lily, Love flowers

Ajuga reptans 'Braunherz'

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

Ajuga reptans 'Burgundy Glow'

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

Ajuga reptans 'Evening Glow'

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

Ajuga reptans 'Valfredda'

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

Ajuga reptans Black Scallop = 'Binblasca'

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

Anemone blanda

Grecian windflower, Greek anemone

Aster 'Little Carlow'

Blue wood aster, Beeweed

Aster dumosus Sapphire = 'Kiesapphire'

Bushy aster, Rice button flower

Brunnera macrophylla 'Jack Frost'

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

Brunnera macrophylla 'Looking Glass'

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

Buddleja davidii Adonis Blue = 'Adokeep'

Orange eye butterfly bush, Summer lilac, Butterfly bush, Buddleia

Campanula 'Kent Belle'

Bellflower

Campanula carpatica 'Blaue Clips'

Carpathian bellflower, Tussock bellflower, Carpathian harebell

Campanula persicifolia 'Takion Blue'

Willow bellflower, Peach bells, Peach leaf bellflower

Campanula portenschlagiana

Dalmation Wall harebell

Campanula portenschlagiana

Dalmation bellflower, Wall harebell

Campanula portenschlagiana 'Catharina'

Dalmation bellflower, Wall harebell

Campanula poscharskyana

Serbian bellflower, Trailing bellflower

Campanula poscharskyana 'Stella'

Serbian bellflower, Trailing bellflower

Caryopteris x clandonensis 'Heavenly Blue'

Bluebeard, Blue mist shrub, Bluebeard, Blue spiraea, Clandon spiraea

Caryopteris x clandonensis 'Kew Blue'

Bluebeard, Blue mist shrub, Blue spiraea

Caryopteris x clandonensis Grand Bleu = 'Inoveris'

Bluebeard, Blue mist shrub, Blue spiraea, Clandon spiraea

Catananche caerulea

Blue cupidone, Cupid's dart

Ceanothus 'Autumnal Blue'

California lilac, Redroot

Ceanothus 'Madagascar'

California lilac, Redroot

Ceanothus 'Pershore Zanzibar'

California lilac, Redroot

Ceanothus 'Puget Blue'

California lilac, Redroot

Ceanothus 'Skylark'

California lilac, Redroot

Ceanothus arboreus 'Trewithen Blue'

Catalina mountain lilac, Feltleaf ceanothus

Ceanothus griseus var. horizontalis 'Yankee Point'

Creeping carmel ceanothus

Ceanothus impressus 'Victoria'

Santa Barbara Ceanothus

Ceanothus thyrsiflorus var. repens

Creeping blue blossom, Blue blossom, Blue brush

Centaurea montana

Mountain knapweed, Perennial cornflower, Mountain bluet, Perennial bachelor's buttons

Ceratostigma willmottianum

Chinese plumbago, Leadwort

Clematis 'Arabella'

Virgin's bower

Clematis 'Mrs N Thompson'

Virgin's bower

Clematis 'Multi Blue'

Virgin's bower

Clematis 'Perle d'Azur'

Virgin's bower

Clematis 'Star of India'

Virgin's bower

Clematis Diamantina = 'Evipo039'

Evison Regal Double clematis

Clematis Parisienne = 'Evipo019'

Boulevard clematis

Delphinium 'Crystal Delight'

Delphinium 'Guardian Blue'

Delphinium Black Knight Group

Delphinium Blue Bird Group