Dallisgrass Treatment

What Is Dallisgrass?

Dallisgrass is a tough, coarse-textured grassy weed that grows in clumps and spreads quickly through underground stems called rhizomes and seeds. It stands out in your lawn because it grows faster than turf grass, creating rough, unsightly patches that are hard to miss. Once dallisgrass takes hold, it competes directly with your lawn for water, sunlight, and nutrients. Unlike annual weeds that die off each season, dallisgrass is a perennial — it comes back year after year. That makes it one of the most frustrating lawn weeds to deal with. Without targeted treatment, infestations tend to grow larger over time, making early action the best approach for any homeowner dealing with this weed.

Why Dallisgrass Is So Hard to Control

Dallisgrass is difficult to eliminate because of how it grows and reproduces. Its deep root system and underground rhizomes allow it to survive mowing, drought, and general lawn treatments that easily knock out other weeds. On top of that, it produces seed heads that spread new plants across your yard. Standard broadleaf weed killers have no effect on dallisgrass because it is a grassy weed, not a broadleaf plant. Selective herbicides are required, and even those need to be applied multiple times over one to three years to see meaningful results. Without the right products and a consistent treatment plan, dallisgrass will keep coming back stronger each season.

How We Treat Dallisgrass

Our dallisgrass treatment program uses professional-grade selective herbicides chosen specifically for your lawn type. We identify whether you have a cool-season grass like tall fescue or a warm-season grass like bermuda, then apply the right product at the right rate and time of year. Treatments are timed to target dallisgrass when it is actively growing, which improves how well herbicides are absorbed. Our technicians follow strict application guidelines — including proper weather conditions and correct spray coverage — to maximize results while protecting your existing turf. This is not a one-and-done service. It is a multi-application program designed to reduce dallisgrass populations progressively over multiple seasons.

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Fescue Lawn Treatment

Treating dallisgrass in tall fescue lawns requires extra care because both plants are grasses. We use Fusilade II at a reduced rate to selectively target the dallisgrass while limiting stress on your fescue. You should expect temporary yellowing of your fescue for about two to four weeks after treatment — this is a normal side effect of the herbicide and is not permanent damage. Your fescue will recover. We schedule fescue treatments during late spring, May through June, or late summer, August through September, to avoid treating during summer heat stress or winter dormancy. Most fescue lawns require two to four applications per year for two to three years to achieve significant and lasting dallisgrass control.

Bermuda Grass Lawn Treatment

Bermuda grass lawns allow for more effective dallisgrass treatment because we have access to products that work well in warm-season turf. We use Monument 75WG or Celsius depending on conditions and infestation level. These products are highly effective against dallisgrass and cause only minimal, short-term stress to bermuda grass. Most bermuda lawns show full recovery within seven to fourteen days after treatment. We time applications from late spring through mid-summer — May through July — when bermuda is actively growing and best able to recover quickly. Bermuda lawn programs typically require two to three applications per year for two years to achieve solid, long-term suppression of dallisgrass throughout the lawn.

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What Results Should You Expect?

Dallisgrass treatment is a process, not an instant fix. In year one, most lawns see a 40 to 60 percent reduction in dallisgrass — visible improvement, but not complete elimination. Year two typically brings 60 to 80 percent control as repeated treatments continue to weaken surviving plants. By year three and beyond, most properties achieve 70 to 90 percent suppression. Complete eradication cannot be guaranteed because dallisgrass seeds can remain dormant in the soil and resprout over time. Our goal is consistent, meaningful suppression that prevents the problem from spreading and gradually thins out existing infestations, giving your lawn the best chance to fill back in with healthy turf grass.

How Many Treatments Will I Need?

The number of treatments depends on your lawn type and how widespread the dallisgrass infestation is. Fescue lawns generally need two to four applications per year for two to three seasons. Bermuda grass lawns typically require two to three applications per year for about two years. Spreading treatments out over multiple seasons is necessary because no single application can eliminate all dallisgrass at once — new growth from rhizomes and dormant seeds requires ongoing follow-up. We track your lawn’s progress over time and adjust application timing and rates as needed. Consistent seasonal treatments give you the best chance of achieving long-term control and preventing existing patches from expanding further into healthy areas of your lawn.

Before and After Your Treatment

To get the best results from each treatment, a few simple conditions need to be met. Applications work best when temperatures are between 60 and 90 degrees Fahrenheit — ideally between 70 and 85 degrees — and wind speeds are below 10 miles per hour. We will not treat if rain is expected within four hours of application. After your service, avoid watering for 24 hours and hold off on mowing for three to five days so the herbicide has time to move through the plant. The treated area will be safe for people and pets once the application has fully dried, which typically takes two to four hours. Following these steps helps protect your lawn and improves the effectiveness of each treatment.