John D. Byrd, Mississippi State University, Bugwood.org

Dallisgrass is a perennial, grassy weed. The leaf blades are 1/4–1/2 inch wide and 4 to 10 inches long, and form slowly spreading clumps. The clumps spread by underground rhizomes, making it a difficult weed to control. If left unmowed, flower stalks can reach upwards of 5 feet high. Dallisgrass seedheads consists of 2 to 10, drooping spikelets originating from different points along the stem and are lined with two rows of egg-shaped seeds.

It sprouts in early spring, but can grow all year round in warm climates—most prominently in low, wet ground and high-cut lawns.


Dallisgrass is mainly found in the warmer Southern states.

Related or Similar Plants

Paspalumgrass, Goosegrass, Crabgrass, Knotgrass, Bahiagrass, Watergrass


Cultural Solutions

  • Mow lawns at shorter end of recommended mowing height range.
  • Hand pull seedlings and young plants as soon as you notice them.
  • Avoid spreading seed on contaminated lawn mowers or hoses.