These are the tuberous anemones as opposed to the fibrous-rooted types such as pasqueflower (Anemone pulsatilla). All are spring-flowering. The most familiar kinds are the ones sold by florists. Which are hybrids of A. coronaria. These have three-inch, very brightly colored flowers in shades of red, pink, purple, blue, or white, often with striking black or yellow centers. They look a bit like small oriental poppies and grow 12 to 18 inches tall. Popular strains are the single “De-Caen” hybrids and the semi-double St. Brigid and St. Bavo.
None’s are reliably hardy as fulgens are similar in flower and growth, bright red and a little hardier. A. blanda “Greek anemone” is harder still, though a bit less showy. Moreover, daisy-like flowers on six-inch stems in shades of blue, pink, lavender, and white carpet the ground and may survive as far north as Zone 5 with a winter mulch.
Well, if you want to grow Anemones or WindFlower, then these flowers like full sun but can take part shade, especially at midday. The soil should be well-drained and can be lightened with organic matter for better growth. Add some lime if the soil is acid or if you have used an acid material like peat to lighten the soil.
Soak the tubers overnight in water before planting. A. coronaria tubers are planted 8 inches apart, 2 to 3 inches deep those of Greek anemones 4 to 6 inches apart, and 2 inches deep. If you live in the north you need not give up on the tender anemones altogether. Either grow them indoors or plant them outdoors in early spring, then dig them in late summer and store them in a cool place in bags of peat.