Heuchera, also known as Coral Bells or Alum Root, are native to North America. They form airy clusters of bell-shaped flowers on stalks held high above the foliage. Coral Bells form mounds of rounded, lobed foliage in a multitude of colors. Heuchera are long-blooming and their flowers are attractive to butterflies and hummingbirds. They grow best in partial shade to mostly shade in moist, well-drained, humus-rich soil. Depending on variety, Heuchera mostly bloom late spring to early summer. Heuchera villosa, which is native to much of the eastern and southern portions of the U.S., tends to bloom in late summer.