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When you have turf grass in your yards to bring the natural beauty to your home be ready to deal with birds that try to eat your grass seeds and also Dallisgrass which is a weed prominent in turf grass. Dallisgrass is a perennial grass that is also known as Paspalum dilatatum, and it can be invasive if you do not take action early. Research indicates that clay and sandy soils provide the perfect conditions for Dallisgrass to thrive; this can be the reason why this weed is Argentina and Uruguay.

For livestock keepers, Dallisgrass can be a nightmare because they are susceptible to Fungus that is toxic to livestock when ingested. When you know what you are looking for and how to manage it, you can win the fight against Dallisgrass.

How to identify Dallisgrass

Dallisgrass has a close resemblance to knotgrass (a perennial grass used to form mats). This weed grows in a clump and has a coarse texture with fairly broad leaf blades compared to turf grass blades. The Dallisgrass stalk can grow up to 65 inches with its inflorescence having about 6 or more spikelet. You can identify this grass by looking at the seeds on the spikelet; the seeds are egg-shaped, flat and the colors fall between pale green and purple.

Person mowing his lawn

After identifying the grass now, it is time to get rid of it.

How to kill Dallisgrass

If you do not have Dallisgrass in your lawn yet, you may want to consider the preventive measures to keep them away. But if the unwanted visitors are already in town here are ways of eliminating Dallisgrass:

1)      Lawn management

Garden management is easier done when you are planting your grass seeds, but it can also be done even if the grass is grown. Dallisgrass is opportunist and use unused space in your lawn to germinate. After removing the grown Dallisgrass weed, ensure that your garden is well and densely planted with turf grass giving no space for Dallisgrass seed’s germination. You can help turfgrass resist Dallisgrass invasion by mowing your turf grass at its optimum height.

Clean turfgrass without any Dallisgrass

2)      Manual Labor

This is also a natural way to kill Dallisgrass from your lawn. This method is functional if the garden is small or if the area is not densely populated with Dallisgrass. It involves digging up the clumps of Dallisgrass from the roots to ensure that you kill it completely. After digging out the bunch, thick layers of mulch is used in the area to prevent the seeds from germinating.

When you remove Dallisgrass from your lawn be sure to replace turf grass so as to eliminate any possible space for the weed to manifest.

3)      Use of chemicals

When you have a big lawn that is infested with Dallisgrass, it can be an impossible task to dig out the clumps. There are post-emergent and pre-emergent herbicides that can be used to get rid of the grass ad also manage the seeds germination. The post-emergent is used on lawns that are ready experiencing Dallisgrass takeover; you don’t have to worry about these herbicides killing your turf grass or any other plants you have in your lawn. There are selective herbicides that eliminate a targeted species, and there are general herbicide that eliminates any plant it comes into contact with. Glyphosate is an example of a general herbicide that will eliminate any plants that come in contact with it. Afterward, you can clear the dead grass and do a thorough soil prep to plant your preferred grass seed. This will also give you a chance to practice a healthy and densely gardening to eliminate any idle space that can give a chance to Dallisgrass seed’s germination.

Using chemicals to eliminate weed

When you are using chemicals, leave the lawn unmowed for about 2 weeks to expose all the grass leaves for maximum chemical efficiency; it is recommended that you apply the herbicide about 3 times in a week until the weed is exterminated. Also, avoid irrigating your lawn for about 24 hours after you have applied the herbicide.

It is also important to use pre-emergent herbicides because Dallisgrasshas many seeds and they are dispersed by the wind, birds, or human. You may eliminate the clumps, but if the seeds were dispersed, already you will have the same problem in no time. Pre-emergent herbicides ensure that the seeds do not grow on your lawn.


Dallisgrass grow much faster in areas where nitrogen fertilizer is utilized. You can control the growth of this grass by using prevention methods if your lawn is not infested yet. The size of your lawn and gardening practices will determine which method you will use to eradicate this weed. Chemical methods have their downside, and you have to be careful with the chemicals that you use to avoid contaminating your soil. Read the manufacturer’s guide on the application and what other users say about the chemical to ensure its efficiency.