Most gardeners are familiar with classic perennials such as daylilies, peonies, hostas, and iris, but there's a whole host of lesser-known, underused perennials that can add color and interest to your garden. You may have to search for them at your garden center or an online source, but they're all worth the effort. Here are 15 of our favorite underused perennials.
Baptisia australis (Blue false or wild indigo) A long-time garden favorite, it produces large spires of violet-blue flowers in late spring to early summer on a rounded mound of foliage that remains attractive throughout the season. Hardy in Zones 3-9, it gets 3-4 feet tall and wide.