Blau

Lobelia siphilitica 'Donker Blauw'

Tradescantia andersoniana

Agastache 'Spicey'

Salvia nemorosa 'Dark Blue Marvel'

Eryngium variifolium 'Miss Marble'

Veronica liwanensis

Geranium clarkei 'Kashmir Blue'

Campanula 'Purple Sensation'

Salvia verticillata 'Endless Love'

Geranium himalayense 'Baby Blue'

Scabiosa caucasica 'Fama'

Lithodora diffusa 'Grace Ward'

Sisyrinchium 'Sapphire'

Iris sibirica 'Aquarius'

Agastache 'After Eight'

Veronicastrum virginicum 'Apollo'

Veronica gentianoides 'Pallida'

Lithodora diffusa 'Star'

Lavandula angustifolia 'Siesta'

Eryngium variifolium

Campanula 'Kent Belle'

Aster frikartii 'Mönch'

Aster cordifolius 'Ideal'

Lavandula intermedia 'Fragrant Memories'

Campanula lactiflora 'Border Blues'

Salvia forreri

Veronica 'Baby Blue'

Ajuga tenorii 'Princess Nadia'

Salvia nemorosa 'Blue Marvel'

Salvia jurisicii

Lavandula angustifolia 'Peter Pan'

Aster thomsonii

Aster amellus 'Danzig'

Nepeta faassenii 'Junior Walker'

Iris 'Black Gamecock'

Ajuga reptans 'Golden Glow'

Salvia guaranitica 'Blue Enigma'

Salvia officinalis 'Würzburg'

Adenophora confusa 'Hemelstraling'

Vitex agnus-castus

Scabiosa columbaria 'Mariposa Blue'

Aster amellus 'Dr Otto Petschek'

Pulmonaria angustifolia 'Blaues Meer'

Aster laevis 'Novemberblau'

Nepeta grandiflora 'Pool Bank'

Vinca minor 'Josefine'

Veronicastrum virginicum 'Lavendelturm'

Scutellaria scordiifolia

Salvia nemorosa 'Viola Klose'

Salvia guaranitica 'Black and Blue'

Polemonium yezoense 'Purple Rain'

Geranium ibericum

Geranium magnificum 'Turco'

Aster frikartii 'Wunder von Stäfa'

Aster 'Little Carlow'

Aster amellus 'Blue King'

Aster amellus 'Breslau'

Aster amellus 'Glucksfund'

Aster amellus 'King George'

Aster amethystinus 'Freiburg'

Centaurea montana 'Coerulea'

Lavandula intermedia 'Phenomenal'

Salvia nemorosa 'Blue Bouquetta'

Salvia verticillata 'Smouldering Torches'

Veronica austriaca 'Azurit'

Salvia nemorosa 'Rianne'

Ajuga incisa 'Blue Enigma'

Campanula primulifolia

Geranium magnificum 'Ernst Pagels'

Iris sibirica 'Côte d'Azur'

Kalimeris incisa 'Variaster'

Vinca minor 'Valentin'

Aster novi-belgii 'Blaue Nachhut'

Caryopteris divaricata

Lavandula angustifolia 'Melissa Lilac'

Nepeta subsessilis 'Dark Blue Panther'

Veronica spicata 'Blaufuchs'

Phlox 'Sweet Summer Ocean'

Carex flacca 'Blue Zinger'

Geranium tuberosum

Amsonia orientalis

Salvia uliginosa 'African Skies'

Iris sibirica 'Kaboom'

Brunnera sibirica

Lavandula angustifolia 'Twickel Purple'

Iris ensata

Aster 'Treffpunkt'

Aster laevis 'Blauschleier'

Agastache 'Serpentine'

Veronicastrum sibiricum

Strobilanthes 'Blue Carpet'

Scutellaria incana

Salvia nemorosa 'Marcus'

Amsonia tabernaemontana salicifolia

Amsonia ciliata

Amsonia tabernaemontana

Rosmarinus officinalis 'Veitshöchheim'

Iris sibirica 'Ruffled Velvet'

Globularia trichosantha

Iris sibirica 'Reprise'