Alum Root or Coral Bells are grown for their attractive mounds of foliage and, in many cases, pretty flower spikes.
There are about 50 species, native to the mountains of North America and Mexico, but only a few of these are found in gardens, as modern hybrids and cultivars take precedence.
They grow best in fertile, but well-drained soil, in full sun or part-shade. Varieties with lighter foliage benefit from more shade, to protect from scorching. Waterlogging, especially in winter, will not be tolerated.