This vigorous Korean and Japanese native (the species name means "coming from Haku," a mountain in Japan) is attractive in the garden for its long lasting pink/lavender, fuzzy arching plumes, as well as its gray-green, heavily scalloped leaves.  Korean Burnet, sometimes called "Lilac Squirrel" (and you can see why) grows to about 30 inches tall when in flower and prefers full sun to partial shade in moist, well-drained soil.   Zones 4 -10.  Quarts.  Photo by KENPEI (KENPEI's photo), GFDL (www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (www.creativecommons.org/licenses/by-sa/3.0), via Wikimedia Commons)