Considering more native plants? Aruncus dioicus, known commonly as Goatsbeard, hails from Missouri, and thrives in partial shade in a humus rich, well drained soil that stays moist in the growing season. The foliage is medium green and fernlike, with 4-5′ plumes of tiny white flowers in late spring/early summer. Because Aruncus is dioecious (meaning some plants are male and some are female), you might notice that the flowers may differ from plant to plant. Male flowers are a bit showier, with more stamens per tiny blossom.
Exposure: Part Shade