Purple

Sisyrinchium angustifolium 'Lucerne' (Blue-Eyed Grass)

Iris versicolor 'Purple Flame' (Blue Flag)

Eupatorium coelestinum (syn. Conoclinium coelestinum) (Hardy Ageratum/Blue Mistflower)

Iris versicolor (Blue Flag Iris, Wild Iris)

Salvia azurea (Blue Sage/Pitcher sage)

Salvia greggii Arctic Blaze® Purple (Autumn Sage)

Hemerocallis 'Summer Wine' (Daylily)

Ajuga reptans 'Black Scallop' (Bugle Weed)

Panicum virgatum (Switchgrass)

Monarda punctata (Spotted Bee Balm)

Eragrostis spectabilis (Purple Love Grass)

Veronica longifolia Skyward™ Blue (Long-leafed Speedwell)

Ajuga reptans 'Bronze Beauty' (Bugle Weed)

Aster novae-angliae 'Purple Dome' (New England Aster)

Echinacea purpurea 'Magnus' (Coneflower)

Echinacea purpurea 'PowWow Wild Berry' (Coneflower)

Vernonia noveboracensis (New York Ironweed)

Echinacea Kismet® Raspberry (Coneflower)

Lobelia siphilitica (Blue Cardinal Flower)

Echinacea x purpurea 'Cheyenne Spirit' (Coneflower)

Kalimeris incisa 'Blue Star' (False Aster)

Hemerocallis 'Rosy Returns' (Daylily)

Echinacea Sombrero® Sangrita (Coneflower)

Hemerocallis 'Pandora's Box' (Daylily)