Grassy Weed – Dallisgrass

(Paspalum dilatatum)

Dallisgrass is a perennial grassy weed. Preferring marshes and damp to wet disturbed habitats, Paspalum dilatatum is frequently found growing in pastures, lawns, golf courses and other turf areas. In the United States, Dallisgrass is commonly found in the states falling in the humid subtropical climate zone.      

Identifying Dallisgrass -

Dallisgrass can be identified as a coarse-textured, robust clumping perennial. It features a tall, rounded ligule and a smooth, broad collar. The sheaths are compressed with a prominent midvein that is sometimes hairy. Dallisgrass features flat blades with sparse hairs near the ligule. The blade edges are rough and both surfaces are smooth.

Dallisgrass also features a seedhead that is produced on a terminal stalk reaching up to 5 feet in height. The seedhead includes 3 to 5 spikes branching from the center, with each spike measuring 2 to 4 inches long and containing 4 rows of spikelet.

Dallisgrass reproduces by very short rhizomes and seeds in the summer.

Dallisgrass Control -

It is possible to remove Dallisgrass through cultural control methods, including hand pulling, however these methods are extremely time consuming.


Scotts LawnService recommends cultural weed control practices to reduce Dallisgrass in your lawn and landscaping. This is due to the limited number of selective weed control products options to kill this weed. However, this weed can be controlled with non-selective weed controls such as Round-Up, which will kill this weed and surrounding turfgrass.  Re-seeding may be necessary to repair treated areas where Round-Up is used.

Scotts LawnService is the trusted industry leader for professional quality lawn care. Our exclusive lawn care products include premium grass seeds and professional-grade fertilizers; our lawn service teams consist of highly trained, industry-certified professionals. Contact a representative today for Dallisgrass control options available in your area and to learn how you can enjoy a lush, thicker lawn that only Scotts LawnService can deliver.