Astilbe : this perennial is a great shade plant with dense foliage + feathery, summer blooms for a shade garden. aka False Spirea, False Goat's Beard. Astilbe is native to Asia and North America. Blooms in June-July. Colors include pink, red, white, purple and peach. Plants grow 18" to as much as 5 feet. There is a dwarf variety that grows about 6". Pairs well with hydrangeas, hostas, & ferns.
This garden is sparked by interesting foliage. Complementing the hydrangea and phlox are variegated canna, hosta, blue fescue, red cordyline, various gold-leaved plants, and even a purple-leaved hazelnut.