I just planted a mess of them last fall. As I understand it, fall planting has them in flower during their normal early spring (any time now) period. Anemone planted in spring will flower by early summer. If they make it through winter, they reset to flowering in their traditional early spring period.
BTW, mine are popping up everywhere. Some just breaking through the soil but those next to the brick wall on the north side of the house are about 10-12 inches high. That side gets no direct sun but I am guessing the warmer basement heats the soil a little???