Amsonia hubrichtii (Arkansas blue star)

A. chrysantha is a vigorous grower that will add a real burst of color to any southern garden. This southwestern U.S. native has 3-inch yellow flowers in spring and reaches almost 3 feet tall.

'Husker Red' is one of the few penstemons that does well in wet winters and hot, humid summers. Ruby-toned leaves appear in spring, followed in late spring and early summer by 3-foot-high stems adorned by panicles of white blooms.  The flowers attract bees, hummingbirds, and butterflies, but the plants are not magnets for deer or rabbits. In autumn and winter, songbirds feast on the seed. For a stunning display, plant 'Husker Red' in groups. -Chris Kelley, Regional Picks: Midwest, Fine Gardening issue #120

'Forsyth Lemon Drop' is lovely and cheerful daylily cultivar.

Originating in mountainous woodland and stony habitats from Europe to western Asia, yellow foxglove is tolerant of dry shade but flourishes with moisture. Arising in midsummer from neat clumps of fine-toothed foliage, a mass of soft yellow open bells, speckled brown inside, blooms along one side of a 3-foot-tall stem. Usually described as a perennial, it is more accurate to call it a biennial or short-lived perennial. If the flowering stalk is cut down after blooms have faded, it may rebloom in the fall. When a few flower stalks are left, the plant self-seeds.