Goat's Beard looks good whether it is blooming or not. It is also an important butterfly host.
Japanese Primrose is a good solution for damp and partially shady areas.
Wonderfully fragrant, Lily of the Valley will spread over a large area, making this shade-loving plant a good ground cover solution.
Bleeding Hearts bring bright color to shady spaces. They will bloom as long as 6 weeks
Sweet Woodruff is a vigorous spreader that can nicely bridge a gap between full and partially shaded areas.
Deer-resistant Bloody Cranesbill can grow in almost any location--full sun, part shade, or full shade--which makes it a very nice, low-growing transition plant.
Deer-resistant, pollinator-friendly Big Betony blooms for several weeks in the spring.
Orchid-like Toad Lilies are a late bloomer, which will also help extend your shady show.