The list represents only a small fraction of the perennials that do well in most areas of the United States. Yarrows grow 6 to 24 inches high, and have white, pink, or golden flowers frequently combined with silvery foliage. Dwarf types can be used for rock gardens. Yarrows are also good for cut flowers. Achilleas will grow in most soils.
Propagation is by seed or division of clumps.
Seed germinates in 7 to 14 days. They prefer sunny areas but will tolerate some shade, Propagation is by seed planted any time from spring to September. Germination is irregular. Hardy asters are easy to grow in the shade or full sun. They are also used for cut flowers Propagation is by seed or division of clumps.