Best Ant Killer for Lawns or Yards for an Ant-free Home

Ian Mutuli
Updated on

Lawns are among the most reliable sources of food for ants making yards and lawns a frequent target, and that's why the best ant killer for lawns is a necessary investment. Most ants usually live outdoors, and as much as they are good for the earth to make it fertile when they infest your lawn, it becomes unusable for pets and children. The best ant killer should clear all pests in your yard quickly but also protect your lawn from future infestation.

Notably, there are multiple options in the market, and it can be challenging to decide on the best option. Therefore, we have curated a list of the best ant killers for your lawn and added a buying guide to help you choose the one you need.

1. TERRO T300 Liquid Ant Baits

Terro Outdoor Liquid Ant is the most effective way to eliminate ants in a short time, and it is designed to eliminate the entire colony. These liquid ant baits are designed to attract workers, and once they find the sweet bait, they consume and leave a trail, which alerts other ants who come to seek it. It is the best ant killer for lawns because it will take a short while compared to other baits as it only takes 24 to 48 hours to work.

Terro Outdoor Liquid baits also come repacked and filled, and you can use them immediately, making the process less time-consuming and easy. However, the ant baits cannot stay in one place for a long time as they thicken and solidify, reducing effectiveness.


  • Prefilled making it ready to use.
  • Kills all ants that come in contact with infected ants.
  • Suitable for both indoor and outdoor pest control.
  • The bait stations don't leak their chemicals.
  • It doesn't dry out thanks to the patented design.
  • The bait works as a pest control because it eliminates all common household ants.


  • The liquid bait may thicken with time.
  • The bait is not safe to be used around kids and pets because of the active ingredient borax.

2. Amdro Ant Block Home Perimeter Ant Bait Granules

Amdro Ant Block granules are the best ant killer for lawns for maximum effectiveness, and they work to kill the entire colony by releasing a slow-acting toxin or poison. The worker ants usually carry the bait and take it back to the colony as food to share where it kills the queen, and the larvae who eat it also die. The outdoor ant bait is designed to taste like food and is applied around the perimeter of your home, and any ants on contact will come across the bait and leave a trail for other workers to find the same bait and carry it back to the nest.

Amdro Ant Block ant bait features hydramethylnon, a metabolic inhibitor, as the active ingredient meaning the pesticides will attack the metabolic system, which results in an inability to perform basic functions and thus causing dehydration and starvation. You will apply it by shaking the granules out in a wide band around the perimeter of your home, and it will take about 7 to 14 days to kill the whole colony.


  • Easy to apply.
  • Thanks to the attractant food design, they are prevented from entering your home.
  • The granular bait offers a substantial coverage.
  • The bait is very effective in killing ants.


  • The granules are not reliable ant baits as they can get washed away by heavy rain.
  • It will not offer the same coverage level as a spray.

3. Cutter Backyard Bug Control

Cutter Backyard Bug Control 32 oz Ready-to-Spray Hose...
  • KILLS FAST: Kills mosquitoes, listed ant types, fleas and other...
  • QUICKFLIP HOSE-END SPRAYER: Hose-end-sprayer activates spray at...
  • LASTS ALL SUMMER: Controls up to 12 weeks against house crickets,...
  • COVERAGE: Treats up to 5,000 square feet of lawn
  • NO MIXING REQUIRED: Attach the sprayer to a garden hose to treat...

Cutter Backyard Bug Control is an effective ant killer as it kills all ants, including the carpenter ant, fleas, mosquitoes, or any other pesky insects present in your yard. It comes in a 32-ounce bottle that treats up to 5000 square feet of your lawn, and once you spray it on your lawn, its strength can last up to four weeks.

Cutter Backyard Bug Control is an ant killer that comes with a flip hose-end spray that you connect to your garden hose and spray it from that point but always remembers to shake the container before use. The Cutter Backyard spray does not leave any residue or smell behind, and it is also children and pets-friendly, enabling families to play in the yard without experiencing effects.


  • The bait is easy to attach to a garden hose and easy to use.
  • It comes with a convenient hose attachment.
  • The spray can cover up to 5,000 square feet, making it suitable for large lawns.
  • The spray can control some pests and ants for up to four weeks.
  • Offers up to 12 weeks of insect protection.


  • The spray might stop functioning after rain.

4. Safer 51703 Diatomaceous Earth-Bed Bug Ant Killer

Safer 51703 Diatomaceous Earth-Bed Bug Flea, Ant,...
  • Diatomaceous earth-based powder is a highly effective ant killer;...
  • Kills insects by ingestion/dehydration within 48 hours indoors or...
  • Also for bed bug, cockroach, flea, earwig, silverfish, cricket,...
  • Insects cannot develop an immunity to this product unlike...
  • Formula contains 100% Diatomaceous Earth

Safer 51703 is made with 100% ground diatomaceous earth and comes in an airtight bag that includes a powder duster to apply the bait easily. The ant bait lacks an expiration date like other ant bait products, thanks to the fossilized remains that will not go off. The ant killers puncture the exoskeleton when ants encounter them, and this dries out their lipids and removes the barrier that prevents dehydration, causing the ants to dry and die.

Safer 51703 Diatomaceous Earth ant killers are pet and child safe even though the dry powder may become airborne during application and cause minor irritation to the lungs and throat. Also, because the bait is natural with no chemical compounds, insects will not form resistance as it is a mechanical action that will kill the ants within 24 to 48 hours, leaving your lawn ant-free.


  • The price is affordable.
  • It is a natural bait solution.
  • The bait can easily reach the hard to reach areas as it is easy to apply.
  • It is harmless for your pets and kids.
  • Versatile as it can be used both indoors and outdoors.
  • It can be used as pest control for other pests like bed bugs.


  • The bait does not kill ants instantly.
  • It can be messy when clearing up.

5. Amdro Fire Ant Bait Granules

Amdro Fire ant granules are designed specifically for hardy fire ants, and through their two-step process, you will eliminate all visible ants and their colonies within a few weeks. The fire ant bait can be applied using a broadcast spreader or by shaking it from its bag as a full spread treatment and a spot treatment, and once you locate fire ant mounds, two tablespoons are enough to spread around the mound.

However, the Amdro Fire Ant Bait Granules are not weatherproof, and therefore you cant apply them on soaking wet ground or when rain is expected. Although these fire ant killers are designed for fire ants, they also work as pest control for carpenter ants, bigheaded and harvester ants.


  • The formula is powerful as it is specifically made for fire ants.
  • Easy to apply.
  • It is among the ant baits that offer substantial coverage.
  • The active ingredient is hydramethylnon, making it very effective.


  • The ants' fire bait is not weatherproof.

What Are The Types of Outdoor Ant Killing Products?

There are several types of outdoor ant killers. Most of them contain a slow-acting insecticide known as Borax. Its nature will take advantage of the ant's social nature, infecting the queen, larvae, and the entire colony. Some of the types include:

a). Liquid Baits (Liquids and Gels)

This liquid ant bait is a sweet solution used as the attractant or bait stations, whereas the gel baits are dispensed with a syringe which can be great for the hard-to-reach areas the normal granules and traps would not reach.

b). Sprays

There is a range of liquid sprays and aerosols available as contact killers and barriers that will surround your house. So when you spray this outdoor ant killer on the ant trail or around the house, it will act as a deterrent.

c). Solid Baits (Granules and Dust)

Granules are a protein bait type that is applied by spreading on your lawn and for the dust them include such as Diatomaceous Earth which dries out the exoskeletons or nervous system of ants and other insects. The granules might be better than Diatomaceous Earth because the rain might wash away most of the dust.

Factors to Consider Before Purchasing the Best Ant Killer for Lawns

1. Type of Ants

There are different species of ants, and they also get attracted to different things, and some include:

a). Odorous Ant

Odorous ants are called so because they stink and are hard to squash as they are resilient, meaning they can stand up to soft and cheap ant treatments. Unfortunately, these types of ants are hard to get rid of because they can withstand a lack of food and adverse weather, so you have to use a strong product to eliminate them to avoid establishing an inside colony.

b). Carpenter Ants

Carpenter ants are probably one of the largest ants in yards, and they range from orangey-red to black and have pronounced pincer jaws and large heads. A carpenter ant has strong jaws which dive into the wood and may cause plenty of damage to your home in a short time, so once you see them on your lawn, you should act fast.

c). Fire Ants

These fire ant species are prevalent pesky critters and safety risk because they sting and bite when threatened. The string makes a human feel like their skin is on fire and can last for a few hours with continuous itching around the area for up to a week. A single fire ant colony can have up to a million ants, and the fire ant mounds are the first sign to notice, but there's probably a whole colony underground by the time you notice.

d). Ghost ants

This type of ant is a tropical species and will often be seen in warm climates, and when the weather is cold outside, they will find a way into your home. The ghost ants are difficult to spot but are super active as they branch off from already established colonies and start new ones, and by the time you spot them, chances are they have already spread all over your yard or lawn.

2. Size of Lawn and Infestation

Whenever you are looking for a spray treatment or lawn-specific product, you will need to keep in mind your lawn size, and this way, you will make a purchase that will fit your whole lawn area. Once you know your lawn's size, check each product for the estimated area coverage. Also, remember to read the details carefully as it may require you to apply the ant bait in a concentrated form for a large ant infestation or less if the ants are far between.

3. Waterproof

Since the lawn is outside, purchasing a waterproof ant killer is necessary to avoid the outdoor ant treatment being washed away during the bad weather. The best ant killer for lawns should have a formula that will not be washed away or blown away, which will mean you will use less money and minimum applications.

Additionally, the waterproof outdoor ant killer will be more effective and fast-acting to deal with the problem and reduce the risk of fire ants vacating your home. However, some of the best ant killers will use harsh chemicals that will make them weatherproof and effective, but they may also be harmful to your grass.

4. Pet and Child-Friendly

This is an important consideration for most yard owners because if you have kids and pets, the last thing you want is to use an ant killer product that will be a health hazard for your children and pets. In addition, harsh formulas mean the product will only get applied when your pets and kids are away from your yard, which is not realistic. Therefore most parents usually opt for home remedies or organic, all-natural products.

5. Bonus Features

Some of the best ant killers not only deal with ant infestations but also work great with spiders, cockroaches, ants, and other insects. Therefore, if you have numerous pests on your lawn, you can either opt to go with a separate best ant killer for lawns or choose a versatile option that will clear all your infestations at a go.

Frequently Asked Questions on the Best Ant Killers for a Lawn

1. How do I permanently eliminate ants outside?

To permanently kill ants, you will need to kill the entire colony. Many ant killers usually attract insects which will then feed on the bait and then bring it to the queen, and when the queen dies, you are guaranteed the whole colony will die. However, a new ant colony can develop again, so permanent protection is not guaranteed even when you have killed the original colonies.

2. How do I eliminate fire ants in my lawn without killing the grass?

You can do this by creating a 2% insecticide spray by mixing one tablespoon of soap with quarter water, combining the mixture, and then putting the liquid into a spray bottle. Next, spray some soapy water on the plants, visible ant trails around the entire colony, and the mixture will break down the ants' resistance to water and eliminate them without killing your grass.

3. What is the ant bait that will work overnight?

Among the most effective ways to kill the colony is using Borax which is a product that is 100% natural and is found in most ant and pest-control products. It is easily available in your nearest convenience store or supermarket. You will need it to soak the Borax mixture with cotton balls and then place your cotton balls near any ant trails to kill the ants around your home.

4. Can I get rid of ants without killing them?

One of the cheapest ways to get rid of ants naturally without killing them is using table salt. Spreading some salt near the corners, nooks, cracks, and crevices where ants enter will ensure that the ants stay away. A salt line will act as a barrier, and a salt-boiling water solution spray will help in repelling and will not kill the ants. 

Ian Mutuli

About the author

Ian Mutuli

Founder and Managing Editor of Archute. He is also a graduate architect from The University of Nairobi, Kenya.