Achillea (Yarrow) is a perennial garden standby, and there's good reason for it, too. Yarrow is long blooming and comes in all kinds of delicious colors; it has beautiful scented, fern-like foliage; it's slug and deer resistant; it's drought resistant; it's not a bit fussy about soil; and it also makes lovely fresh and dried flower arrangements. And, for all Yarrow gives, it asks very little in return. And one more thing.... The name "Achillea" comes from the fact that Achilles used this Old World plant for healing his soldiers' wounds. The leaves and juices are still used today for their medicinal and healing properties.
Achillea millefolium (Yarrow)
I used to take this native Yarrow for granted: it isn't one of the showy colors one sees in garden centers, and it is seen so frequently that some might consider it weedy. It led me to ask, why would one want so "lowly a creature" in a refined flower garden? I found out I was so wrong when one appeared in my rock garden out of nowhere; now I am able to see that this common yarrow is not so common after all. Its feathery, green foliage and large white flower clusters are uncommonly beautiful. It's amazing how much more desirable it is without all the road dust and without competition from taller and more aggressive wildflowers. This hardy native grows from two to three feet in sun. Zones 3-8. Quarts.
Achillea nobilis (Noble Yarrow)
Achillea nobilis, or Noble Yarrow, is native to parts of Asia and Europe but has become naturalized in North America. Different from the white-flowering Achillea millefolium, Noble Yarrow has, instead, creamy/soft yellow blooms and greenish gray, very fine foliage. By itself or mixed with other Yarrows, this one is perfect for adding color to late summer gardens when most everything else has faded. Achillea nobilis grows to about 12 inches high in full sun and well-drained soil. The fresh flowers are perfect for cutting, but they also are suitable for drying. Zones 4-8b. Quarts. (Watercolor by Jacob Sturm, in the public domain, from Wiki Commons).