Barnyardgrass is an upright summer annual weed of turfgrass. It is found in moist, disturbed sites, marshes, and wet turf areas. Barnyardgrass can most easily be distinguished from other grasses by its seedhead, and the fact that it has no ligule.
These grasses occur infrequently in North Carolina in highly maintained turf but can be common in utility turf, such as along roadsides. Maintaining a dense, healthy turf year round by proper mowing and fertilization helps prevent encroachment and weed establishment.
panicle; seedhead often purple, spikelets end in a bristle
leaves rolled in the bud
Growth Season/Life Cycle
summer annual weed
Leaf blade tip shape
sharp-pointed; edges rough, blades all in same plane
Leaf blade width
0.4 - 0.8 inches (10 - 20 mm) wide
continuous; may have hair on collar, white band on collar
split with overlapping margins
flattened; sheath occasionally has short hairs; red- to purple-tinged at base