Japanese anemones (Anemone x hybrida) spend most of the growing season as small clumps of interesting three lobed leaves, only to become one of the stars of the fall garden when they bloom in late August and September.
They are low maintenance, long lived perennials that can move around the garden until they find a location they love. Not aggressive, easily removed if they choose a location you disagree with, they are a lovely plant to include in your garden. Flowers can be white or pink with a yellow center. Hardiness zone, 3-8, All tolerate part shade.
Some Anemones bloom in spring and Anemone canadensis is a spring blooming, native, fast spreading ground cover for part shade. Be sure to check the labels for requirements when selecting plants.