Fire ants in Texas lawns thrive because our yards give them exactly what they want: open sun, moist soil, and ground that gets disturbed often. The most reliable way to stop them is the Two-Step Method recommended by Texas A&M AgriLife: broadcast a fire ant bait across the whole yard, then treat the individual mounds causing trouble.
Kicking mounds or spraying only the ants you can see rarely finishes the job, because the queen sits deep underground and the colony simply moves. Here's what to know about timing, safety, and when to call Pest Renewal.
Why Do Fire Ants Love Texas Lawns?
Red imported fire ants prefer open, sunny ground with moisture near the surface, and a typical Texas lawn checks every box. Irrigated turf, flower beds, and the soil along driveways and walkways warm up quickly and stay damp, giving colonies what they need to grow and spread across a yard.
Sun, water, and open space
Mounds show up where sunlight reaches the soil: open lawn, tree bases, beside brick walls, and along walks. Texas A&M also notes that imported fire ants readily build in irrigated landscaping. A mature mound can reach about 18 inches tall and has no central opening on top.
Disturbed soil and new construction
Freshly graded lots, new sod, and utility trenches are easy for colonies to claim. Growing subdivisions around Denton see plenty of this, and a disrupted colony can relocate a surprising distance almost overnight.
Why mounds pop up after rain
Waterlogged soil pushes a colony toward the surface, so fresh mounds appear after a soaking storm. In hot, dry weather the opposite happens: the ants tunnel deeper, and the yard can look clear in August even though the colony never left.
What Is the Texas A&M Two-Step Method?
The Two-Step Method is the fire ant strategy recommended by Texas A&M AgriLife Extension for yards with widespread mounds. Step one is broadcasting a fire ant bait over the entire lawn so foraging workers carry it back to their colonies. Step two is treating individual mounds near walkways, play areas, and other high-traffic spots.
Step 1: Broadcast bait across the yard
Fire ant bait is a slow-acting insecticide on a food carrier the ants eat. Workers share it underground until it reaches the queen, who dies or stops laying eggs. Expect results over weeks to months rather than days.
- Apply when the grass and ground are dry and no rain is expected for a day or two.
- Spread bait while workers are foraging, usually late afternoon or evening in warm weather.
- Test first: set a little bait beside a mound and see whether ants pick it up within about half an hour.
- Scatter bait around mounds, not on top of them.
- Use fresh bait and a handheld spreader, and don't mix it with fertilizer or seed.
- Follow the product label for spreading rates and safety directions.
Step 2: Treat individual problem mounds
While the bait works, treat mounds that can't wait, such as those beside a patio, mailbox, or swing set. Mound treatments labeled for fire ants act much faster than bait but only reach the colony you treat, which is why they're the second step rather than the whole plan.
Skip the boiling water
Pouring hot water on a mound is unreliable, since the colony often survives or relocates, and very hot water kills the grass it touches. Kicking or raking a mound scatters the ants and raises your odds of getting stung. Texas A&M also finds that grits, molasses and club soda don't work.
When Is the Best Time to Treat Fire Ants in Texas?
Spring and fall are the strongest windows for yard-wide baiting, according to Texas A&M AgriLife, because workers forage most actively then and far less during hot, dry summer stretches. Most yards need bait reapplied once or twice a year as new colonies drift in from untreated lots, which is why AgriLife encourages neighborhood-wide baiting through HOAs.
Is It Different in Midland and West Texas?
Yes. Red imported fire ants are firmly established in North and Central Texas, but AgriLife reports they occur in only a few areas of West Texas, where native fire ant species may be locally common. The ants in a Midland flower bed may not be the imported kind, so identification matters before choosing a treatment.
Local details are on our Midland pest control page.
Are Fire Ant Stings Dangerous?
For most people, fire ant stings cause burning, itching, and small white pustules that form within a day or two. Try not to scratch them open, because broken pustules can become infected. A small number of people have severe allergic reactions, and those reactions need emergency medical care immediately.
Warning signs include chest pain, nausea, heavy sweating, trouble breathing, serious swelling, or slurred speech. Treat mounds near play areas first, since barefoot kids and curious pets are the likeliest to disturb one.
Signs It's Time to Call a Professional
Do-it-yourself baiting handles many yards. Consider professional help when:
- Mounds keep returning after you've followed both steps
- Colonies are nesting against the foundation, in AC units, or in utility boxes
- Someone in the house has had a strong reaction to stings
- The lot is too large to bait evenly on your own
A licensed technician treats the lawn and the structure with professional products that carry EPA registration and are applied per label directions. Learn how ant control for Texas homes works, or pair it with a quarterly pest protection plan to keep ants from trailing indoors. The same number serves Denton-area homes, Waco, and Midland.
If mounds are taking over your lawn or fire ants have found their way inside, call Pest Renewal and describe what you're seeing. A specialist will walk you through treatment options and schedule a licensed technician.
Frequently Asked Questions
Do fire ants in Texas lawns damage the grass?
Not directly. Texas A&M notes that fire ants don't damage turf themselves, but their mounds are unsightly, get in the way of mowing, and can smother the grass underneath. For most families, the bigger problem is stings while mowing, playing, or walking barefoot.
Will fire ants come back after treatment?
They can. Treatment doesn't stop new colonies from moving in from neighboring lots or open land, which is why Texas A&M recommends reapplying bait once or twice a year. Regular treatment knocks colonies back before they take over the lawn again.
Can I treat fire ants if I have pets?
Yes, with care. Check the product label for how long pets should stay off treated areas, and store bait out of reach. When a professional treats your yard, mention your pets when you call so the technician can plan around them.