10 Best Ant Killer Outdoor Powder of 2025

Tested and Reviewed: Top 10 Ant Killer Outdoor Powder deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Ortho

Ortho Orthene Fire Ant Killer1 – Fire Ant Mound Treatment, Kills Queens, No Watering Needed, Treats up to 162 Mounds, 12 oz (2-Pack)

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Editor's bottom line:

“This ant killer outdoor powder is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Kills Fire Ants & the Queen: Ortho Orthene Fire Ant Killer1 targets the entire colony to get rid of ants at the source
Fast-Acting Fire Ant Treatment: Fire ant granules begin killing in just 60 minutes so you can get back to enjoying your yard fast
Outdoor Lawn and Yard Use: Kill fire ants on your lawn and around ornamental plants, including flowers, trees, and shrubs
Treats Up to 162 Fire Ant Mounds: Simply sprinkle the product over each mound using amount specified on the product label, no watering-in needed
Ortho 2-Step System: This pack includes two 12 oz. bottles of Ortho Orthene Fire Ant Killer1; For best results, use with Ortho Fire Ant Killer Broadcast Granules, sold separately

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Picked by 397 people today

9.5

Ortho

Ortho Fire Ant Killer Mound Treatment1, Kills Mounds and the Queen, Use on Lawns, Ornamentals and Flower Gardens, 3 lb.

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Main Highlights

Ortho Fire Ant Killer Mound Treatment1 kills fire ant mounds in 15 minutes
This pest control product kills mounds and the queen, and keeps new mounds from forming
Use to kill fire ants on residential lawns, on ornamental plants and in flower gardens
Apply this fire ant mound killer when temperatures are between 65°F to 80°F, or early in the morning or late evening when ants are most active
To use this 3 lb. bag of Ortho Fire Ant Killer Mound Treatment1, apply 2/3 cup of product to mounds and surrounding 3-ft. perimeter and drench with 2 gallons of water

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9.5

Ortho

Ortho Orthene Fire Ant Killer1, Kills The Queen, Destroys up to 189 Mounds, Begins Working in 60 Minutes, 14 oz.

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Main Highlights

Ortho Orthene Fire Ant Killer1 kills the queen, destroys the mound, and treats up to 189 mounds
This fire ant killer begins killing in just 60 minutes so you can get back to enjoying your yard fast
Kill fire ants outdoors on your lawn and around ornamental plants, including flowers, trees and shrubs
To treat fire ant mounds, simply sprinkle the product over each mound using amount specified on the product label
Use as part of the Ortho 2-Step System with Ortho Fire Ant Killer Broadcast Granules (sold separately), which prevents new fire ant mounds from forming for up to 6 months

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9.2

Terro

TERRO Ant Dust Powder Killer for Indoors and Outdoors - Kills Ants, Fire Ants, Roaches, Spiders, and Other Insects - T600 - Up to 8 Months Protection - Easy to Use

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Main Highlights

KILL ANTS & OTHER INSECTS: TERRO Ant Dust kills ants (including fire & carpenter ants), cockroaches, spiders and other insects
WATERPROOF FORMULA: The waterproof dust won't wash in the rain, ensuring lasting protection from insects in your yard
KILLS ON CONTACT: This ready-to-use ant dust kills insects on contact
UP TO 8 MONTHS OF PROTECTION: Provides long-lasting residual control, continuing to kill ants and other insects for up to 8 months
EASY TO APPLY: The convenient shaker canister allows for both scatter and widespread application
INDOOR & OUTDOOR USE: Apply in cracks and crevices, around perimeters and foundations, in crawls spaces and wall voids, in flower beds, and directly on ant hills
Waterproof
Lasts up to 8 Months
Kills Carpenter Ants
Deltamethrin

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9.0

Terro

TERRO Ant Killer Plus Multi-Purpose Insect Control for Outdoors - Kills Fire Ants, Fleas, Cockroaches, and Other Crawling Insects - 3lb Shaker Bag - T901-6

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Main Highlights

SAY GOODBYE TO BUGS: TERRO Ant Killer Plus kills ants, fire ants, roaches, fleas, crickets, earwigs, millipedes, mites, palmetto bugs, silverfish, sow bugs, and more
QUICK RESULTS: The powerful insect killing granules kill listed insect pests within 24 hours of contact while also providing residual repellency
OUTDOOR USE ONLY: These insect killing granules are for outdoor use only. Apply the granules as band treatment around house foundations and on lawns, or as a spot treatment on ant hills
EASY TO APPLY: The resealable shaker bag design allows for convenient application. There's no chemical spreader or broadcaster required
GREAT VALUE: The shaker bag holds 3 pounds of insecticide granules

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8.8

BioAdvanced

BioAdvanced Fire Ant Killer Outdoor, Dust, 1.5 lb, 195 Mounds

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Main Highlights

COVERAGE: Fire ant and red ant killer outdoor treats up to 195 mounds
EASY APPLICATION: Just sprinkle on with the easy-to-use shaker top
FAST ACTING: This fire ant killer starts working immediately
LOW ODOR ANT KILLER: Fire, pavement and red harvester ant mound killer outdoor dust kills the Queen and the mound

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8.6

Neudorff

Neudorff Outdoor Ant Killer, Ant Bait Granules 1 lbs Treats up to 2,000 sq. ft. & Lasts up to 4 Weeks, Home Perimeter Treatment for Organic Gardening, Insect Bait Attracts and Kills (1 lb)

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Main Highlights

Ant Killer Outdoor Effective for up to 4 Weeks: Neudorff's ant bait lures insects from hiding places and plants. Home perimeter treatment attracts and kills insects outside so they dont come inside.
Proven Insect Ant Killer Outdoor: Kills foraging ants, sweet-feeding ants, pavement ants, moisture ants, little black ants, Argentine ants, crazy ants, acrobat ants, bigheaded ants, cornfield ants, ghost ants, odorous house ants, thief ants, Texas leafcutting ants, field ants, and other common ants (excluding fire ants, harvester ants, Pharaohs ants and carpenter ants), earwigs, cutworms, sowbugs, pill bugs, and crickets.
1lb Treats up to 2,000 Sq. Ft.: Keeps listed ants out of the house by using Neudorff Ant Killer & use around the Perimeter of Homes, Structures, Gardens, Landscaped areas, listed vegetables, listed fruit trees, listed citrus, listed berries, ornamentals, shrubs, flowers, trees, lawns, gardens, and in greenhouses.
For Organic Gardening & People and Pets Can Enter Treated Area after Ant Bait Outdoor Is Applied
Highly compressed granules (pellets) formulation is easy to use, clean to handle, and economical. Ants Killer Outdoor contains Spinosad, which is derived from a soil dwelling bacterium

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Our Best Overall Choice

Best Choice

9.7

Ortho

Ortho Orthene Fire Ant Killer1 – Fire Ant Mound Treatment, Kills Queens, No Watering Needed, Treats up to 162 Mounds, 12 oz (2-Pack)

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Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Kills Fire Ants & the Queen: Ortho Orthene Fire Ant Killer1 targets the entire colony to get rid of ants at the source
Fast-Acting Fire Ant Treatment: Fire ant granules begin killing in just 60 minutes so you can get back to enjoying your yard fast
Outdoor Lawn and Yard Use: Kill fire ants on your lawn and around ornamental plants, including flowers, trees, and shrubs
Treats Up to 162 Fire Ant Mounds: Simply sprinkle the product over each mound using amount specified on the product label, no watering-in needed
Ortho 2-Step System: This pack includes two 12 oz. bottles of Ortho Orthene Fire Ant Killer1; For best results, use with Ortho Fire Ant Killer Broadcast Granules, sold separately

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