Nimblewill — One Tough Lawn Weed
By Barbara Shepard, Fairfax Master Gardener
Did you notice round, straw-colored areas of dead grass in your lawn this past winter? And then did you notice that those same spots turned green when other plants started growing and blooming in spring? If so, your lawn may be plagued with nimblewill, a tough weed to control.
Nimblewill (Muhlenbergia schreberi) is a perennial warm-season grass weed that has a straw-brown appearance during its winter dormancy (from first frost to late spring). During active growth, the color changes to dull blue-green, although some describe it as pale-green or gray-green. Its leaves range in size from 1 to 3 inches, and a quarter-inch wide. It tolerates a variety of soils and conditions and very often grows in shady areas that desirable grasses snub.