Rodgersia - A large, tropical looking plant that comes back year after year down to zone 5. Three to six feet high and wide, they love shade to part sun, lots of moisture and protection from wind and afternoon sun. This makes a dramatic statement in any bed! I am disappointed that this plant won't work in my zone 4 garden.
Bottlebrush buckeye: This large shrub has several factors in its favor; it blooms during the dog days of summer (August) with huge spires of white flowers similar to those of an oakleaf hydrangea, attracts butterflies, has good fall color and, unlike hydrangeas, is deer-resistant.