The flowers measure three inches across and fade to pink in sun. The shrub measures 8 feet high by 8 feet wide. This herbaceous perennial is an old-fashioned garden beauty with pendants of rose-coloured, heart-shaped blooms on plants that are 18 to 30 inches tall. The finely cut, blue-green foliage forms neat clumps. There is a heavy flush of bloom in May and then sporadically throughout the summer into fall.