Heuchera (coral bells) grows most vigorously and has the stongest colors in partial shade (preferably afternoon shade). Growth rate is very slow in full shade. Leaves showier than flowers. Great contrast in the border.
Astrantia 'Hadspen Blood' This Masterwort prefers part shade and moist soil that does not dry out. Masterwort blooms continuously throughout the summer and fall, wafting a sweet scent. Like Queen Anne’s lace, each masterwort blossom is an umbel of tiny flowers, framed by a collar of papery bracts.