Knotweed is a sprawling, wiry, broadleaf annual weed that rarely grows over a few inches high. Tiny, oval, bluish-green leaves are ¼ inch wide and 1 inch long. Flowers are small and inconspicuous, whitish-green and born in leaf axils in fall. Knotweed can form a thick mat, up to 3-feet in diameter, choking out desirable lawns and plants.


Knotweed is found throughout the United States, especially in compacted soils.

Related or Similar Plants

Prostrate Knotweed, Knotgrass, Doorweed, Matgrass

Cultural Solutions

  • Reduce soil compaction (aerating lawns) and maintain healthy turf.
  • Mulch and hand-pull.