Dealing With Fire Ants

 The Myths, the Facts, and the Legends They Inspire

🐜Garden Pests | by Guy Saldiveri | Updated: 03/01/2026

Fire ants are the bane of every garden south of the Mason‑Dixon—from the Atlantic to the Pacific and everywhere in between. What's worse is they’re adapting to colder climates and creeping steadily northward.

While they probably have a few more years before they terrorize gardeners in Pennsylvania or Maine, they sure are right at home down south.

Fire ants aren't just a normal ant colony. Personally, I think they're the precursor to the Borg. They are thousands working as a single entity with only one goal—survival of the colony.

Eradicating them may be an impossibility, but we can sure put a dent in them. Let's explore the Myths, the Facts, and the Tales that have become Legend.

The Myths

• Mixing ants from one mound with ants from another mound causes fighting to the death.
• Boiling water kills the mound.
• Grits and water will kill them.
• Club soda suffocates them.
• Diatomaceous Earth.
• Pouring gas on the mound will take them all out.

The Facts

There is really only one reliable way to eliminate a mound, but before we get to that, let’s walk through each of these myths and talk about why they persist.

Mixing Ants

Let’s start with the idea of mixing ants from different mounds to make them fight. This one has more truth to it than the others, but only in a historical sense. Ants from different colonies did at one time fight to the death, and while some may still, the majority of the mounds you see on your property are all from the same colony. 

Yes—colonies really are that large. 

To make matters worse, modern colonies are perfectly content with multiple queens. Taking ants from one mound and dumping them onto another is less like starting a turf war and more like reuniting long‑lost cousins at a backyard barbecue. They might get a little excited, but it’s not going to trigger a gladiator match.

Boiling Water

Next we have boiling water. You have to have a little understanding of mound architecture to understand why this one won't work. 

Mounds are like icebergs—the part you see on top is a fraction of what's really there. Ants tunnel deep underground. They create passages far away from the volcano you see. 

The queen is safely hidden in a vault down some dark—well-guarded alleyway. Dumping boiling water on that volcano will definitely kill all the ants it comes into contact with, but if any water actually makes it to the queen, it will be lukewarm at best. No harm will come to her and without killing her, the mound survives.

To add insult to injury, boiling water kills plants, sterilizes soil, and can collapse tunnels in ways that make the mound relocate rather than die.

My advice—save the boiling water for the coffee…

Grits

The third on that list—and probably the most frequently recommended one in forums—is grits. I don't know if this one has the same origins as the "Don't throw rice at weddings because the pigeons will eat it and explode" thing, but you can be sure grits have the same effect on ants that the rice has on pigeons. It feeds them and fills their bellies!

Now to be honest, ants can't actually eat the grits, at least not in a normal way. They do take it back into the mound where the larvae process it into a meal for the colony. But they definitely don't explode because of it. Best case scenario—and I think this is where people get the idea it works, is that the ants see the grits and just move. They don't like things on their mounds so they just pack up and leave. Of course they are completely unharmed when they do.

Club Soda

Club soda—OK, have you ever seen a ball of ants floating in a stream of water after a heavy rain? It really is an amazing thing to witness. You want to talk about Borg action, this nails it 100% There is no better teamwork you can imagine than watching 2,000 ants clinging together in a ball, saving the queen, and just moving on. Even the ants that are underneath the water generally survive this. Bottom line—ants are extremely difficult to drown or suffocate. 

Remember what I said earlier about the mound architecture? It's laid out with tunnels galore. If you block off the air to one part, the ants have plenty of air coming in the back door. When I say these guys are efficient, trust me, they are EFFICIENT. 

Club soda might work, but it would take a vacuum-sealed dome over the mound with high pressure injection to even come close. No, this is another one of those times you'd be better off saving the water (even carbonated water) for something else. Pour it over ice and drink it on one of those hot summer afternoons while you are out weeding the beds.

Diatomaceous Earth

This one is a half‑myth, half‑truth method. I say that because while it will kill some fire ants, it won’t come close to killing enough — and it certainly won’t kill the queen. At best, the mound will relocate due to the inconvenience.

DE works as a contact irritant. It dries out their exoskeletons, but it’s largely ineffective against the main colony. It works well on slow‑moving pests like slugs because they crawl through it and take a lot of damage. Ants, on the other hand, are fast‑moving creatures, and at best it will do more damage to their feet than anything else. They’ll walk right over it and keep going.

You also have to deal with the fact that it cannot get wet. If it does, it needs to be reapplied. If you’re dealing with ants in a container, you’ll have to avoid watering that plant for a few days to give the DE a chance to do its job.

Gas

OK, that leaves pouring gas down the hole. Well, I have to admit, one of my first attempts at fire ant eradication actually used this method—I'm still alive to tell you that not only didn't it work; I can promise you I will never attempt it again. 

Remember when I said all those mounds form one big colony? Well, guess what, they are all interconnected as well. There are tunnels all over your yard. Pouring gas down one hole sends fumes and vapor throughout those underground excavations. The ants realize the danger immediately and quickly move the queen. Once lit, those fumes all light up and you will have flames coming up all over the yard—and hopefully not underneath the house. We don't even want to get into the environmental aspect of this disaster and the impact on ground water. 

Pouring gas on a mound is not only ineffective—it's very dangerous.

What Actually Works

That brings us to the "What is it that actually does work" stage.

The only reliable way to get rid of these guys is with chemicals. This is not something I say lightly because, other than fertilizer, I despise having to use any chemicals in my garden—especially around edibles. I've said I'm not an organic gardener, and I hold to that, but I don't believe throwing unnecessary chemicals all over the place is the answer either. 

There are a few organic and a few non-organic methods we can discuss, some more effective than others. The first thing I will say—and this is important—ALWAYS read the product label. Pay attention to it like it's gospel—labels carry warnings for a reason. Don't let your desire to get rid of fire ants cause harm to you or someone else. 

When using any chemicals, make sure you understand:

• Whether it's recommended for use in edible gardens or just flower beds—VERY important!
• Pre-Harvest Interval (PHI)—usually measured in days—indicates how much time has to elapse before you can expect a safe harvest after application.
• Residual effect—how long it works, how long it stays harmful to you, what effects it may have on other wildlife and the environment.

That being said, your best method of getting these guys gone is a combination of a long-term bait and local mound destruction. This gives you the instant (or close to it) kill of the ones that are right there, and the long-term "keep them out" that you want.

The first thing I'd suggest is laying out your baits. Baits are generally not recommended inside the beds or to be applied directly to the soil. They work because the ants treat them like a food source. They take it down into the nest where it's processed and fed to the queen. This kills off the colony and keeps the ants out. There are many variations on baits and too many products to discuss here, but in general, they work the same way.

Baits work great for the long term, but that doesn't solve your short-term problem: the mound that's keeping you from weeding your bed. For that, we need to get out the heavy artillery and hit them where it hurts.

Once again, lots of options here. Drenches and granules seem to work best for me and I generally stay with granules. I find it easier to sprinkle a little on the mound and water it in vs mixing something 2 parts to 5 gallons, applying at dusk and doing three cartwheels after each application—but that's just me ;)

Whatever you use, pick one that says it kills on contact; it's safe to use in and around vegetable gardens (if that's your application), and make sure you understand when it's safe to get back into contact with the area again.

What to do when fire ants move into a container

When fire ants move into a container, they’re not all doing the same thing. Depending on the size of the pot, where it sits, and how long the ants have been there, you may be dealing with one of three situations:

• It's a satellite mound—just scouts and workers building a new nest
• It’s become the main entry and exit point for a larger colony in the ground
• It’s become a brand new colony (queen and brood fully inside the pot)

If it turns out to be a satellite mound, it will be easy to kill off the group with a drench or granules. That won’t solve the larger problem though, because the main colony isn’t there — you’ll still need to bait the area or they’ll just return.

You may even be able to pull the plant from the pot, clean off the root ball, and repot it. Arguably, that would work if the plant is small. Mine tend to be in 10–25 gallon containers, so that removes that as a valid method for me.

If the pot is sitting on the ground and the ants have gotten into it, they’re usually still in the soil underneath and only using the container as an attic, loft, or foyer. In that case, move it out of the way, treat the container, and then treat the colony below.

If your container is sitting on a patio and large enough to hold the entire colony, you could just use baits around the outside or just treat with a drench or granules. The colony should be contained enough to even have the queen killed off.

A side note here: if you happen to use a product that indicates it works systemically or even some organic products like Spinosad, be aware that it may pose a risk to any pollinator that visits that plant.

This is the proven and trusted way to get rid of ants in your garden areas. Believe it or not, applying granular bait, two to three times per year to your whole yard is not only cost-effective, but also very effective in keeping ants away year-round. It's something to consider looking into.

Final Takeaways

• Apply a broadcast bait 2–3 times per year.
• Treat active mounds with a contact‑kill drench or granules.
• Follow all label instructions, especially PHI for edible gardens.
• Avoid home remedies — they waste time and sometimes cause real harm.

Fire ants aren’t invincible — they just require the right strategy. With smart baiting, targeted treatments, and a little patience, you can turn your yard back into a garden instead of a battlefield.

Happy Gardening 🌱