Top 5 Best Ant Killer For Lawns in 2022 – Reviews & Buying Guide

When thinking about ants as pests, most homeowners imagine these little eusocial insects invading your kitchen area seeking sweet treats such as sugar, syrup, and other carbohydrates. Ants are as much of a threat to outdoor areas as inside your home. Below we will cover the five best ant killers for lawns.

Fire ants tend to display exceptional aggression and administer very painful bites when disturbed. Fire ants have also can cause damage fast by damaging the roots in your lawn and transform them into a landmine filled with fire ants and mounds. When ants go about their day-to-day activities of harvesting food and mound construction, visible damage appears in the form of brown spots and uneven turf as they push soil from below for ventilation and doorways to the surface.

These underground mounds not only damage roots but the peaks and valleys in your lawn, as a result, make it difficult to mow effectively. Ants also cause damage to grasses because of tiny insects they farm call aphids. Aphids secrete a sweet nectar-like fluid called honeydew. Honeydew is sugar dense fluid that aphids produced as they destroy your lawn as they dine on your grass blades.
Once you notice one ant mound, it is time to act and act fast. It doesn’t take long for fire ants and the grass munching aphids to cause significant damage to your lawn and make your yard a dangerous and unsightly place.


The 5 Best Ant Killer For Lawns on the Market

With virtual identical customer ratings, it’s challenging to determine which of the five is best for you. Some products require water, while others do not, some are kid-friendly, and others are not. The application process varies from product to product, and some require a broadcast application, and others require a more targeted approach.


Best Lawn Ant Killer Reviews

1. Ortho Fire Ant Killer Broadcast Granules – The Best Fire Ant Killer for Lawns

The Ortho Fire Ant Killer comes in an 11.5-pound bag and should offer protection over a 5,000 square feet area. These granules protect for six months at a time and destroy mounds and ants. With virtual instantaneous effectiveness, the Ortho Ant Killer begins the destruction of ant mounds in the first 15 minutes of the initial application.

The chemical make-up of the granules prevents the formation of mounds when applied to the lawn. Not only does the Ortho Fire Ant Killer kills ants from the same colony, but also any “fly-in” queens searching for land to build a new queendom. This product is broadcast designed and should be spread all over your lawn or any area you wish to destroy and prevent future mound formation. They formulate these granules to kill fire ants and their mounds but are just as useful for over 20 additional ant species.

Coverage Area

The Ortho Fire Ant Killer treats 5,000 square feet for every 11.5 pounds and 10,000 square feet of protection for every 25-pound bag. This coverage area may vary significantly, as some mounds may require more or less of the product to be effective.

Where to use it?

This is best for residential areas and is safe around children, garden plants, and pets. While this product has been tested and proven to be child and pet-safe, I think it is a good idea to limit exposure and side with caution.

How to use it?

These granules should be spread evenly throughout the entire lawn, not just infected areas. Once granules are evenly distributed, water your lawn to allow the granules to soak into the turf and soil.

Avoid using Ortho Fire Ant Killer on areas where it can easily wash into drainage systems, including but not limited to driveways, streets, or sidewalks. Also, ensure the product is not used near ditches, gutters, or suffers water sources.

When to apply it?

To take advantage of the long-lasting effects, treat your entire lawn twice each year, once during early spring and once again late summer. For optimal performance, always apply Ortho granules during the coldest times of the day, either morning or late evening. During the early morning hours and late hours of the evening, ants are much more active. When ant activity is at its peak, Ortho granules will be most effective. Ortho Fire Ant Killer is available in most southern and southeast states, and New Mexico, Oklahoma, and Hawaii.

Is This Product Right for you?

Ortho Fire Ant Killer Broadcast is an ideal product for consumers with lots of land, which makes it easier to avoid the unpleasant odor to the strong smell. Consumers with smaller lawns may have issues with the scent, as it has been reviewed reek through walls and windows. If you are looking for a fast-acting product that is proven to get the job done, this may be an ideal option.

How to Kill Fire Ants and Keep Them Away for 6 Months with Ortho® Fire Ant Killer


  • Works very fast
  • Child, garden, and pet safe
  • Rather pungent smell

2. AMDRO Ant Block Home Perimeter Ant Bait Granules – The Best for Preventing Ants from Coming into the Home

The AMDRO Ant Block is for home protection from carpenter ants, fire ants, and 23 distinct ant species pests. The Ant Block Home Perimeter is unique as it kills ants outside while simultaneously but preventing them from moving from the yard to your home.

With a focus on prevention by creating an impassable barrier around your home, the AMDRO Ant Block should offer continuous protection for at least three months from any of the 23 species of ants. The 24 oz bottle should yield up to five give four to five applications for an average-size home, which comes to a little over 1,000 linear feet. The AMDRO Ant Block is in granule form and is a combination of insecticides to kill pests but also attract them, making this formula irresistible to ants.

Coverage Area

AMDRO insecticides are available in 12, 24, and 32 oz, and every 24 oz bottle should be able to protect up to 1,080 linear feet. The coverage area can vary depending on the accuracy during the application process.

Where to use it?

Ant Block should be used around the perimeter of your home to act as a barrier of defense to not only kill insects around your home but prevent them from entering. Not limited to home protection, but this product can protect porches, decks, and virtually any area where the threat of insects is.

How to use it?

Before the first use of the AMDRO Ant Block granules, carefully inspect your house perimeter for ant hills or any visible sign of high activity if you discover areas of high activity during your initial inspection consent efforts using the Ant Block at these areas first. After a meticulous inspection of your home’s perimeter, carefully drop a one-foot line of these granules around the entire edge of your home.

When to apply it?

For optimal effectiveness, always use AMDRO Ant Block during ant’s most active times of the day, as this will increase the efficiency of the process. There is no need to add water after you sprinkle the granules. The manufacturer recommends not applying this product to moist or damp grounds and trying to use it on days when rain is not expected. AMDRO granules are not pet-friendly nor should they be used in areas frequented by children.

Is this product right for you?

AMDRO Ant Block is an ideal pest control option if you do not currently have an ant problem indoors. Primary used to prevent ants from coming into the home; this can be an excellent product to bait and kill ants around the house and create a barrier of protection.

How to Apply Perimeter Ant Treatment Around Your Home


  • Kills ants outside the home and prevents ants from entering
  • Water not required
  • Requires lawn and soil to be dry to be effective
  • Hazardous to children and pets

3. Amdro Fire Ant Bait Granules – The Best for a Customer without Pets and Children

The Amdro Fire Ant Bait is granule designed and is used to target fire ants and their hidden nests. It is potent only needing as little as two to five tablespoons to be effective. This product is not a contact pesticide as it works by allowing the worker ants to bring the granules back to the nesting area to maximize the death toll. The unique formula used to create the Amdro Fire Ant Bait fools the worker ants into thinking it is safe food, which they bring back to the nest. The baiting has a delayed response, meaning the ants will not die on initial contact but later deep inside the mound. The delayed action of Amdro Fire Ant Bait is critical in its ability to kill the queen.

Coverage Area

The insecticide should be placed directly on and around visible ant mounds. The average ant mound requires two to five tablespoons or 30 to 75 grams of bait per mound. Each two-pound bag of these granules should be able to treat 12-30 mounds or 4,000 to 8,000 square feet and see results within two weeks.

Where to use it?

The Amdro Fire Ant Bait should be applied directly to fire ant mounds, patios, gardens, lawns, and around the home. It is also recommended to ensure that children and animals don’t come into direct contact with the product to avoid possible poisoning.

How to use it?

The Amdro granules are bait and poison, which means it is formulated to be harvested by the worker ants and brought back to the colony for effectiveness. You should sprinkle two to five grams of the bait directly on and around the mound to allow the granules to worker ants to bring them down into the nest. Within the first week, the queen should die, and by week two, the entire colony should fall.

When to apply it?

Amdro Fire Ant Bait should be applied when ants are most active to maximize effectiveness. Never use the granules when the ground is wet are when you are expecting rain. Once the granules come into contact with water, they lose effectiveness and spoil.

Is this product right for you?

The Amdro Fire Ant Bait can be right for you if two weeks is not too long to eradicate the problem. For the baiting process, there is a delayed effect, and this may not be optimal for everyone. The potential hazard to children and pets should be taken into consideration, coupled with the delayed reaction, this may not be the product for you. Ideally, this product may be best for a customer without pets and children, specifically dogs who frequent the yard.

How to Treat Fire Ants with the Two-Step Method


  • Baiting allows the poison to kill the queen and destroy the mound
  • This product is not child and pet-friendly

4. BioAdvanced Fire Ant Killer Dust

The BioAdvanced Fire Ant Killer Dust is one of the fastest ant pesticides on this list according to customer reviews. Unlike the granule-shaped pellets of the other products reviewed, but fine dust should be placed directly on the ant mounds and other areas you noticed ant activity. This product does not kill the ants on the first contact, by design as this allows the ants to track the dust throughout the nest and eventually kill the colony from within, including the queen.

The 16-ounce container should be enough to treat 195 mounds. The amount you sprinkle per mound will affect the number of mounds you are to treat. This insecticide does not require any additional steps after application, which means no watering after usage. This product claims to work in three days; however, verified customers have claimed to see results within minutes. The BioAdvanced Dust claims to kill fire ants, pavement ants, red harvester ants, and the queen.

Coverage Area

The BioAdvanced Fire Ant Killer should cover around 130; however, you may treat upwards of 190 mounds. The amount of powder per mound will ultimately determine how many mounds you can manage with one 12 ounce bottle. For every teaspoon of the BioAdvanced Fire Ant Killer, or just under five grams should treat one mound and about ten grams, or two teaspoons for more massive mounds.

Where to use it?

This product is for outdoor use only typically on lawns, flower beds, at the base of trees, and other areas mounds and fire ant activity is clear.

How to use it?

The BioAdvanced Fire Ant Killer 16 oz bottle has to shake holes that allow you to sprinkle the recommended amount directly on the mounds. To apply, hold the bottle 12-18 inches above the mound and shake twice for one teaspoon or four shakes for two teaspoons for more massive mounds. Some customers place a little piece of tape to cover some holes. The tape will conserve more of the product, as the potency of the BioAdvanced Fire Ant Killer has been reported by customers to work with less than one teaspoon. Do not use water with this product, as it should stay in powder form to allow the ants to spread it throughout the mound. Avoid using this product near eatable crops.

When to apply it?

The insecticide should be used as needed wherever you notice fire ant activity and mounds. During warmer months, ant activity peaks during early mornings and late evenings, these are optimal times as you this increases the effectiveness of the ant’s ability to spread the powder throughout the mound.

Is this product right for you?

This product is useful if you don’t have an ant problem near eatable crops. Avoid using this if your ant problem is near a home garden or on a farm near plants. The BioAdvanced Killer is perfect for the average consumer with an ant problem in their front and or backyards. One 12 ounce bottle can treat over 100 mounds, making this a good option for the average consumer.

  • Fast-acting formula
  • Easy to use, no water necessary
  • Hazardous if used near eatable crops

5. Control Solutions Martin’s Surrender Fire Ant Killer Insecticide

The Control Solutions Martin’s Surrender Fire Ant Killer is for harvester ants and fire ants only. While this product is for fire ants specifically, many consumers report its ability to kill German roaches also.
Martin’s Surrender Fire Ant Killer Insecticide is a powder form product and is very potent. Typically, you should see results within the first 24 hours of the initial application. This powder is “wettable,” which means once it is wet, the effectiveness increases as it offers residual protection for the entire season. The one-pound bag should treat over 100 mounds and should be applied directly over the mound in one even coat. Control Solutions Martin’s Surrender Fire Ant Killer powder is water-soluble, which allows plants to absorb the product and offer protection from other insects who feed on grass blades.

Coverage Area

Martin’s Surrender Fire Ant Killer requires one to two teaspoons (five to ten grams) for small or large mounds. One pound should yield enough to treat 108 mounds for the entire season.

Where to use it?

This insecticide is only for outdoor use and away from eatable crops or where contamination by drift can occur. This product should be used throughout the lawn, where you see fire ant mounds and activity. Avoid using this powder near borders, ditch banks, borrow pits, or roadside areas to lower the possibility of contaminating more vulnerable areas.

How to use it?

To use Control Solutions Martin’s Surrender Fire Ant Killer evenly sprinkle one to two teaspoons (five to ten grams) over the fire ant mound only once per season. The potency of the product may damage the surrounding grass if too much is applied.

When to apply?

Control Solutions Martin’s Surrender Fire Ant Killer is a rather long-lasting pesticide and should only be used once per season (three to four months). It is recommended this product should be used during the ant’s most active times of the day, which is early in the morning or late in the evening.

Is this product right for you?

This insecticide may be a good option for the average consumer with enough yard space to avoid the smell. If you live on a hill or need to treat areas, touches utility holes, a gutter that may contaminate unwanted areas.

  • Water-soluble
  • Residual effectiveness as roots absorbs it and gives grass protection
  • Long-lasting, up to four months of continuous protection
  • Suitable for treating fire ants, harvest ants, and German roaches
  • Very high potency
  • Potential widespread contamination, avoid gutters, drains, and yard borders
  • Unpleasant smell


Each of the ant killers covered will get the job done, however, some products function slightly differently with variant duration and activation time. If you have small children or pets or live in dense urban areas or sprawling suburbs, one of the five is ideal for you.

Despite the ant killers discussed above, you can also make your own homemade ant killer.

List of Sources

  1. Hoover G.A., Ants in Home Lawns, Penn State Extension
  2. Lewis D., Ants in Lawns, Iowa State University Extension and Outreach
Franklin Jones
I'm Franklin Jones, the guy behind Here’s where I write all the DIY pest prevention, removal and extermination tricks.