1. Blue False Indigo A long-lived perennial, false indigo (Baptisia australis) plants are among the best dark blue flowers for native gardens. Tall flower stems rise from attractive foliage ...

Across eras and cultures, blue flowers have graced myths ... In the 1500s, though, a blue dye called “indigo” was cheaply made from the Indigofera tinctoria plant. Finally, the color was ...