You can get rid of ants without commercial pesticides by combining three strategies: cutting off their food supply, destroying their scent trails, and sealing the entry points they use to get inside. No single method works as well as layering several together, and the approach you choose should depend on what type of ant you’re dealing with and how established the problem is.
Find What’s Attracting Them First
Before you try any remedy, figure out what the ants are after. Different species target different foods. Odorous house ants (the small dark ones that smell like rotten coconut when crushed) go straight for sweets. Pavement ants, which typically enter through cracks in concrete slabs, eat almost anything: meats, pet food, bread, nuts, and sweets. Pharaoh ants, tiny and yellowish, are especially drawn to grease and fats, and will even feed on toothpaste and soap.
Knowing this helps you eliminate the food source that’s drawing them in. Store sugary foods in sealed containers. Wipe down counters after cooking, especially after handling greasy or sweet foods. Don’t leave pet food bowls out overnight. Take garbage out frequently and keep bins sealed. These steps alone can dramatically reduce ant activity within a few days, because scouts stop signaling to the colony that your kitchen is worth visiting.
Destroy Their Scent Trails
Ants navigate using chemical trails laid down by scouts. When you see a line of ants marching across your counter, that line exists because the first ant left an invisible pheromone path for the rest to follow. Killing the visible ants does nothing if the trail remains intact.
A 1-to-1 mixture of white vinegar and water is one of the simplest ways to erase these trails. Spray it directly on surfaces where you see ant traffic, including countertops, floors, windowsills, and baseboards. Wipe the area thoroughly. Ants can still detect the vinegar after it dries, which adds a short-term repellent effect, though the smell fades quickly for humans. Reapply daily until you stop seeing scouts.
Soapy water works similarly. A few drops of dish soap in a spray bottle of water breaks down the waxy coating on ants’ bodies (which kills them on contact) and disrupts the pheromone trail at the same time. This is a good option for wiping out a visible cluster quickly.
Use Essential Oils as Barriers
Several essential oils repel ants effectively enough to create barriers at entry points. Peppermint oil is the most commonly used because its high menthol content is intensely irritating to ants. Cinnamon oil works through a compound called cinnamaldehyde, which ants actively avoid. Tea tree, lemon, eucalyptus, and lavender oils also repel ants, though peppermint and cinnamon tend to be the strongest options.
To make a spray, mix about 10 drops of peppermint oil with one cup of water and a teaspoon of dish soap (which helps the oil mix into the water instead of floating on top). Spray this along baseboards, doorframes, window edges, and any cracks where you’ve seen ants entering. Reapply every few days or after cleaning. For a more persistent barrier, soak cotton balls in undiluted essential oil and place them near entry points. Replace them weekly or when the scent fades.
Essential oils won’t kill a colony. They redirect ant traffic and can keep new scouts from entering your home, but they work best alongside other methods.
Set Up Natural Baits
Repelling ants pushes them away from your living space, but baiting is what actually kills the colony. The goal with any bait is to offer something the worker ants will carry back to the nest, where it eventually reaches the queen. If the queen dies, the colony collapses.
Borax and Sugar Bait
Borax (sodium borate) is a naturally occurring mineral, not a synthetic chemical, and it’s one of the most effective DIY ant killers available. The key is getting the concentration low enough that ants don’t die before making it back to the nest. A recipe developed by the University of Hawai’i uses one teaspoon of boric acid powder mixed with three tablespoons of white sugar, dissolved in just under two cups of warm distilled or bottled water (tap water can reduce effectiveness). Stir until completely dissolved, then soak cotton balls in the solution and place them near ant trails.
Worker ants drink the sweet liquid and carry it back to feed the colony. Because the borax acts slowly, it spreads through the nest before killing. You may actually see more ants for the first day or two as word spreads that there’s a new food source. That’s a good sign. It means the bait is being transported. Keep the bait stations refreshed for at least a week.
Baking Soda and Powdered Sugar
A simpler option uses equal parts baking soda and powdered sugar. The two powders look and feel similar enough that ants can’t tell them apart. The sugar draws them in, and the baking soda reacts with acid in their digestive system, killing them internally. This method is less proven than borax baiting and works more slowly, but it’s a reasonable option if you don’t have borax on hand or want something safe to use around very young children.
Seal Entry Points
Ants are tiny enough to enter through gaps you’d never notice. Sealing these entry points is the most durable fix you can make, and it reduces not just ants but all kinds of household pests.
Start with doors. Install door sweeps at the base of all exterior doors and apply caulk along the bottom outside edge and sides of door thresholds. For sliding glass doors, line the bottom track with half-inch to three-quarter-inch foam weatherstripping. Garage doors should have a rubber bottom seal (vinyl seals crack in cold weather and stop working).
Next, check where utilities enter your home. Pipes, wires, outdoor faucets, dryer vents, gas meters, and cable lines all create small gaps in your foundation or siding. Plug these with silicone caulk, cement, expandable foam, steel wool, or copper mesh, depending on the size of the opening. Before sealing any crack, clean out debris and remove any peeling old caulk so the new material adheres properly.
Finally, inspect window and door screens for tears, and caulk any visible cracks around window frames, door frames, and fascia boards. A good quality silicone or acrylic latex caulk will last years. This work takes an afternoon but pays off long after the current ant problem is resolved.
Diatomaceous Earth: Useful but Limited
Food-grade diatomaceous earth is a powder made from fossilized algae. Its microscopic particles have sharp edges that damage the waxy coating on an insect’s exoskeleton, causing the ant to dehydrate and die. You can dust it into cracks, along baseboards, and around entry points.
The limitation is significant, though. Diatomaceous earth loses effectiveness when it gets wet, and it rarely eliminates an entire colony on its own. It works best as a supplemental barrier in dry indoor areas, like behind appliances or inside wall gaps you can access. Don’t rely on it as your only method.
Manage Moisture Around Your Home
Many ant species are drawn to moisture as much as food. Carpenter ants specifically seek out wood that’s been softened by water damage, and odorous house ants prefer nesting near moisture sources. Fixing leaky faucets, repairing dripping pipes under sinks, improving ventilation in bathrooms, and making sure gutters direct water away from your foundation all reduce the conditions that attract ants in the first place.
Outdoors, move mulch, leaf piles, firewood, and landscape stones away from your home’s foundation. These create damp, sheltered environments where ants build nests just inches from potential entry points.
When Natural Methods Aren’t Enough
Most common household ants, like odorous house ants and pavement ants, respond well to the combination of sanitation, trail disruption, baiting, and exclusion described above. Carpenter ants are a different situation. They tunnel into structural wood to build nests, and a mature colony can develop satellite nests throughout a home. Signs of a serious carpenter ant problem include small piles of fine wood shavings beneath wooden surfaces, faint rustling sounds inside walls, and large winged ants emerging from ceilings or wall crevices.
A well-established carpenter ant colony can cause real structural damage, and natural remedies are unlikely to reach the queen when nests are deep inside wall voids or structural lumber. If you’re seeing those warning signs, a professional inspection is worth the cost. The same applies to pharaoh ants, which nest strictly indoors in northern climates and split into multiple colonies when disturbed, making them notoriously difficult to eliminate without targeted baiting strategies.