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Weedy Grasses

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Dallisgrass Control

Watering, lawn mowers, people and pets can readily spread North Texas Dallisgrass seed from one spot to another, so it’s important to immediately contact your Weed Man North DFW professional to identify and control Dallisgrass in your lawn.


Dallisgrass seeds generally germinate in the spring and summer when soil temperatures are in the 60- to 65-degree range, resulting in clumpy patches of grass. The patches are coarser in texture and can present a tripping hazard where children regularly play.

Dallisgrass can take a few years to appear after a home is built in North Texas.  These grasses are typically buried by the developer when they plotted the lot for your home with added dirt.  It is not uncommon to find these grasses several inches to several feet below the top soil when you dig a hole on the property. Over time, these grasses will make their way up and eventually appear in your lawn.  When this occurs will depend upon many variables, but if there is Dallisgrass buried under the soil, it is only a matter of time before it appears in your lawn.  No pre-emergent application can stop this from occurring because the grass has already germinated; pre-emergent products stop weeds and grasses at their initial germination stage.

A primary management key is to prevent the establishment of new Dallisgrass seeds through eradication and possibly lawn renovation under dramatic situations. North Texas Dallisgrass in St Augustine grass may need to be controlled through manual or mechanical methods as the best products that treat germinated Dallisgrass cannot be applied to a St Augustine lawn.

Annual Bluegrass (Poa Annua)

Nothing spoils the sight of a healthy, green lawn like unwanted weeds. One of the most aggressive culprits out there is poa annua (annual bluegrass). This lawn invader is the most common and widely distributed grassy weed in the world, and will take over your lawn if given the opportunity.  

This cool-season annual weed tends to thrive in milder weather when lawns are more susceptible to weeds and disease. Its boat-shaped, flower-like seed heads and pale green color make it clearly distinguishable from desirable turfgrass species. Although annual bluegrass can be an issue on all lawns, it is primarily found in areas where Bermuda grass, fescue, and bentgrass are grown.

Potential Problems

Poa annua leaves behind unsightly bare patches when it dies in the heat of the summer, causing lawns to take on a dry, unhealthy appearance. Additionally, like the majority of weeds, poa greatly weakens healthy turf by monopolizing the valuable nutrients that desirable grasses need for survival. In fact, poa will compete aggressively with existing turf. This makes it difficult for your lawn to thrive and is especially harmful for maturing grasses that have not yet had the opportunity to become fully established. Poa will ultimately crowd out new grasses and leave bare patches in its wake.


When it comes to poa annua, prevention is critical. Homeowners often take action when they notice the white, flowery seed heads adorning their lawns. Once poa reaches this stage, however, it is often too late for safe post-emergent treatment. If you have had poa issues in the past, you can be sure that they will return once again – whether annually, biannually, or sporadically. If given ample notice, your local Weed Man can apply a pre-emergent to target poa annua and other undesirable growth.

When it comes to your cultural practices, raising the height of your mower can help defeat this low-growing weed. Deep, infrequent watering will also limit opportunities for the damp-loving poa to thrive.


Rescuegrass is an annual grassy weed this is also often lighter in color but does not usually product seed heads when mown at lawn height.  Similar to other grassy annual weeds the best measure to control rescuegrass is preventatively, however curative controls are available.