Blau

Aconitum cammarum 'Arendsii'

Adenophora confusa 'Hemelstraling'

Adenophora 'Gaudi Violet'

Agapanthus 'Blue Umbrella'

Agastache 'After Eight'

Agapanthus 'African Queen'

Agastache 'Black Adder'

Agapanthus 'Brilliant Blue'

Agastache 'Blue Fortune'

Agastache 'Beelicious Purple'

Agapanthus 'Charlotte'

Agapanthus 'Enigma'

Agapanthus 'Ever Sapphire'

Agapanthus 'Fireworks'

Agapanthus 'Flower of Love'

Agastache foeniculum

Agapanthus 'Lapis Lazuli'

Agapanthus 'Navy Blue'

Agapanthus 'Pitchoune Blue'

Agapanthus 'Purple Cloud'

Agapanthus 'Pretty Heidy'

Agapanthus 'Peter Pan'

Agapanthus 'Poppin Purple'

Agastache rugosa

Agastache 'Serpentine'

Agastache 'Spicey'

Agapanthus 'Tornado'

Agapanthus 'Twister'

Agapanthus 'Vallée de Loire'

Ajuga incisa 'Blue Enigma'

Ajuga reptans 'Atropurpurea'

Ajuga reptans 'Burgundy Glow'

Ajuga reptans 'Braunherz'

Ajuga reptans 'Black Scallop'

Ajuga reptans 'Catlins Giant'

Ajuga reptans

Ajuga reptans 'Mini Mahogany'

Ajuga reptans 'Variegata'

Ajuga tenorii 'Princess Nadia'

Ajuga tenorii 'Valfredda'

Amsonia elliptica

Amsonia 'Ernst Pagels'

Amsonia ciliata 'Halfway to Arkansas'

Amsonia hubrechtii

Amsonia illustris

Amsonia orientalis

Amsonia tabernaemontana

Amsonia tabernaemontana 'Blue Ice'

Amsonia tabernaemontana salicifolia

Amsonia tabernaemontana 'Stella Azul'

Anchusa azurea 'Dropmore'

Anemone nemorosa 'Caerulea'

Anemone nemorosa 'Royal Blue'

Aquilegia alpina

Aquilegia caerulea

Aquilegia caerulea 'Spring Magic Blue White'

Aquilegia flabellata 'Ministar'

Aquilegia 'Heavenly Blue'

Aquilegia 'McKana Hybrids'

Aquilegia 'Blue Barlow'

Aquilegia vulgaris 'Grandmother's Garden'

Aster amellus 'Blue King'

Aster ageratoides 'Blaukuppel'

Aster amellus 'Breslau'

Aster amellus 'Danzig'

Aster amellus 'Dr Otto Petschek'

Aster amethystinus 'Freiburg'

Aster amellus 'Glucksfund'

Aster amellus 'King George'

Aster amellus 'Rudolf Goethe'

Aster azureus

Aster 'Azurro'

Aster 'Barbados'

Aster 'Blauer Gletscher'

Aster 'Blaue Lagune'

Aster 'Blauer Zwerg'

Aster cordifolius 'Blue Heaven'

Aster cordifolius 'Ideal'

Aster cordifolius 'Photograph'

Aster ericoides 'Blue Wonder'

Aster frikartii 'Mönch'

Aster frikartii 'Wunder von Stäfa'

Aster 'Herbstpurzel'

Aster laevis 'Blauschleier'

Aster 'Lady in Blue'

Aster 'Little Carlow'

Aster laevis 'Novemberblau'

Aster 'Mittelmeer'

Aster macrophyllus 'Twilight'

Aster novae-angliae 'Barr's Blue'

Aster novae-angliae 'W. Bowman'

Aster novae-angliae 'Guido en Gezelle'

Aster novi-belgii 'Blaue Nachhut'

Aster novi-belgii 'Brigitte'

Aster novi-belgii 'Dauerblau'

Aster novi-belgii 'Eventide'

Aster novi-belgii 'Marie Ballard'

Aster novi-belgii 'Porzellan'

Aster novi-belgii 'Schöne von Dietlikon'

Aster novi-belgii 'Violetta'