Blue

Veronica spicata subsp. incana

Blue willow herb, Spiked speedwell

Veronica spicata subsp. incana 'Saraband'

Blue willow herb, Spiked speedwell

Veronica tauricola

Crimean speedwell

Veronicastrum virginica 'Adoration'

Bowmans root, Culvers physic, Oxadaddy, Quitch

Veronicastrum virginica 'Fascination'

Bowmans root, Culvers physic, Oxadaddy, Quitch

Veronicastrum virginicum

Bowmans root, Culvers physic, Oxadaddy, Quitch

Veronicastrum virginicum 'Pointed Finger'

Bowmans root, Culvers physic, Oxadaddy, Quitch

Veronicastrum virginicum var. sibiricum

Bowmans root, Culvers physic, Oxadaddy, Quitch

Vicia cracca

Tufted vetch, Bird vetch, Canada pea, Cat pea, Vetch, Tare, Bean

Vinca major 'Maculata'

Greater periwinkle, Band plant, Running myrtle, Large periwinkle, Band plant

Vinca minor 'Aureovariegata'

Lesser periwinkle, Lesser creeping myrtle, Common perwinkle

Vinca minor 'Azurea Flore Pleno'

Lesser periwinkle, Lesser creeping myrtle, Common perwinkle

Vinca minor 'Blue and Gold'

Lesser periwinkle, Lesser creeping myrtle, Common perwinkle

Vinca minor 'Blue Sky'

Lesser periwinkle

Vinca minor 'Bowles's Variety'

Lesser periwinkle, Lesser creeping myrtle, Common perwinkle

Viola 'Ardross Gem'

Pansy

Viola 'Belmont Blue'

Pansy

Viola 'Columbine'

Viola

Viola 'Denim'

Pansy

Viola 'Elizabeth'

Viola

Viola 'Jewel Blue'

Pansy

Viola 'Marina'

Pansy

Viola 'Morpho'

Pansy

Viola 'Spring Rapids'

Pansy

Viola 'Ultima Morpho'

Pansy

Viola 'Yesterday, Today and Tomorrow'

Pansy

Viola cornuta

Horned violet, Alpine violet, Bedding pansy, Tufted violet

Viola cucullata

Marsh blue violet, Hooded violet

Viola Panola 'Blue Blotch'

Panola Violet

Viola Panola 'Blue y'

Panola Violet

Viola soraria 'Dark Freckles'

Sister violet

Wisteria floribunda 'Burford'

Japanese blue wisteria

Wisteria floribunda 'Domino'

Japanese wisteria

Wisteria floribunda 'Issai'

Japanese wisteria

Wisteria frutescens 'Longwood Purple'

American wisteria

Wisteria frutescens subsp. macrostachya 'Blue Moon'

American wisteria

Wisteria x formosa 'Caroline'

Ceanothus 'Blue Mound'

California lilac, Redroot

Hebe 'Baby Boo'

Lobelia 'Starship'

Cardinal flower

Lobelia x speciosa 'Butterfly Blue'

Hardy bronze leaf lobelia

Nepeta x faassenii 'Kit Cat'

Blue catmint, Faassen's nepeta, Mauve catmint

Agapanthus 'Sandringham'

African lily, Love flowers

Ageratum 'Blue Bouquet'

Floss flower

Ageratum 'High Tide Blue'

Floss flower

Ageratum 'Purple Fields'

Floss flower

Ageratum houstonianum 'Adriatic'

Bluemink, Floss flower, Billy goat weed

Ajuga pyramidalis

Pyramidal bugle, Northern bugle, Upright bugleweed, Spinach ajuga