Nimblewill
Muhlenbergia schreberi · Warm-season, Perennial, C4 grass
Grass Family
Poaceae, subfamily Chloridoideae, tribe Cynodonteae
Grass Category
Lawn/Turf Weed, Native Grass, Pasture
Variety / Cultivar
Wild type / Common Nimblewill
Hardiness Zones
USDA Hardiness Zones 4 to 9. It tolerates cold winters by going dormant very early in the fall and greens up late in the spring compared to cool-season turf.
About This Grass
Nimblewill is a fine-textured, low-growing perennial warm-season grass that often acts as a weed in cool-season lawns. It forms dense, circular patches that turn a dull gray-green or blue-green color during the growing season and tan or straw-colored when dormant. It has very slender stems that branch extensively and flower spikes that resemble narrow, delicate panicles.
Blade Characteristics
Fine blades, typically 1 to 3 mm wide, flat or rolled, with pointed tips. The vernation is rolled in the bud. The ligule is a very short, jagged, membranous fringe with tiny hairs, and auricles are absent.
Root System
Fibrous and shallow, originating mainly from nodes on the creeping stolons rather than deep taproots. It establishes moderately quickly from stolons and seed, forming a loose, mat-like sod that easily pulls up in clumps.
Growing Information
Origin Region
Native to eastern and central North America, commonly found in lawns, damp woods, and shaded areas across the eastern United States.
Growth Habit
Stoloniferous and mat-forming, spreading via slender, wiry above-ground stolons that root at the nodes, creating distinct patches in lawns.
Sunlight & Water Needs
Thrives in moist, shaded to partially sunny areas, often invading damp or overwatered parts of lawns. Moderate to high water requirements during the growing season; exhibits good survival through summer heat but turns brown promptly upon frost.
Mowing & Maintenance
Responds well to frequent mowing due to its low-growing habit, but standard lawn mowers often miss seed heads or low stolons. Maintenance level is moderate if treated as a weed, requiring selective herbicides or hand-pulling.
Special Characteristics
Low wear tolerance, poor drought resistance without supplemental water, highly susceptible to cold-induced dormancy (turns tan/brown for up to six months in northern zones). Often considered a persistent lawn weed due to its distinct lighter color patchiness in cool-season lawns.
Ecological Information
Native North American grass that provides minor cover for small wildlife and insects. It is typically managed as a weed in cultivated turfgrass settings but serves as a natural ground cover in lightly shaded woodlands and disturbed soils.