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Internet # 303404517

Model # 275501

Store SKU # 1004504756

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Orthene Fire Ant Killer1 12 oz. Outdoor Fire Ant Mound Killer, Kills the Queen and Destroys Mounds (2-Pack)

$19.97
  • Kills the queen and destroys fire ant mounds
  • Easy to apply, no watering-in
  • Step 1 in Ortho 2-Step System for fire ant control
  • View More Details

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Product Details

About This Product

Stop fire ants from taking over your lawn with Ortho Orthene Fire Ant Killer1. This easy-to-apply product destroys the mound and kills the queen. Plus, this pest control product begins killing in 60 minutes, so you can get your yard back fast. Use it as a mound treatment for home lawns and around ornamental plants including flowers, shrubs and trees. To apply, simply sprinkle powder over the mound. Follow label instructions to determine how much product is needed based on mound size. This product does not need to be watered in, and can be applied anytime you see a new mound forming. For best results, apply product while ants are active. This pack includes two 12 oz. bottles of Ortho Orthene Fire Ant Killer1; each treats up to 162 mounds. To keep fire ants at bay, use as part of the Ortho 2-Step System with Ortho Fire Ant Killer Broadcast Granules (sold separately) as a second step to prevent new mounds from forming for up to 6 months.

Highlights

  • Ortho Orthene Fire Ant Killer1 kills the queen, destroys the mound and treats up to 162 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, no watering-in needed
  • This pack includes two 12 oz. bottles of Ortho Orthene Fire Ant Killer1; for best results, use as part of the Ortho 2-Step System with Ortho Fire Ant Killer Broadcast Granules (sold separately)
  • Shop all Ortho products
  • Return Policy

Product Information

Internet # 303404517

Model # 275501

Store SKU # 1004504756

Additional Resources

Shop All Ortho

Specifications

Product Width (in.): 8.25 in

Dimensions

Product Width (in.)

8.25 in

Details

Concentrated or Ready to Use

Ready to use

Garden Pest Location

Lawns

Indoor/Outdoor

Outdoor

Location

Lawn, Perimeter

Organic

Non-Organic

Pack Size

2

Pest Common Name

Fire Ant

Product Weight (oz.)

24 oz

Returnable

90-Day

Safe For

Not Safe for Kids and Pets

Safe for Edibles

No

Questions & Answers

Can you use this in the kitchen around food or utensils?
ByMar 13, 2026
2 Answers | 
Answer This Question

Thank you for your question. Ortho Orthene Fire Ant Killer1 is not registered for use on or around any edibles or plants. It should be used for treatment of fire ant mounds in home lawns and around ornamental plants only.

By|Mar 15, 2026

    Hello there! Thank you for that intriguing question. Its truly a firm testament to the potential of the organizations who are having high standards to ensure compliance and fulfillment.

    By|Apr 7, 2026

      (13)

      Will this stuff control the Southeastern Ring Neck Plappeldinger?
      ByFeb 12, 2026
      1 Answer | 
      Answer This Question

      Ortho Orthene Fire Ant Killer1 will not kill or control the Southeastern Ring Neck Plappeldinger.

      By|Apr 7, 2026

        (61)

        Can it be used for roaches 🪳 as well?
        ByJan 3, 2026
        2 Answers | 
        Answer This Question

        Nope.

        By|Apr 8, 2026

          (58)

          Hello Cathy! Ortho Orthene Fire Ant Killer is labeled to control only fire ants.

          By|Jan 6, 2026


            I have 2 questions: 1. How much do I spread per mound? 1 teaspoon or 2 teaspoon amount??? 2. How long before I can remove the mound or mow over it? Thanks
            ByOct 15, 2025
            1 Answer | 
            Answer This Question

            Hi Cyrus! Thanks for your question. The application amount for Ortho Orthene Fire Ant Killer1 is based on the mound size. Below is information on how much product to use for each mound size. The entire fire ant colony should die within 3-7 days. Mowing, tilling, rolling, dethatching, and aerating will not affect the efficacy; however, these procedures will disturb the surface and can cause the fire ants to move their nests. Mound diameter less than 4" - apply 1 teaspoon Mound diameter 4" to 12" - apply 4 teaspoons Mound diameter greater than 12" - apply 3 tablespoons

            By|Feb 16, 2026

              (3)

              Is this product safe to use on palm tree beds?
              BySep 19, 2025
              1 Answer | 
              Answer This Question

              Ortho® Orthene® Fire Ant Killer1 can be used for the treatment of fire ant mounds for home lawns and around ornamental plants. (including flower, shrubs & trees). It's not registered for use directly on ornamental plants.

              By|Sep 22, 2025


                IS THIS OK TO USE AROUND DOGS ??
                ByJul 23, 2025
                1 Answer | 
                Answer This Question

                Hello Puchi. When making an application with Ortho Orthene Fire Ant Killer1 (twin Pack), we suggest, at a minimum, not allowing pets such as cats and dogs, and other non-grazing pets, into the treated area until the dust from applying has settled. For best results, keep pets such as cats and dogs and other non-grazing pets out of the application area for up to 24 hrs so that the mound is not disturbed, allowing the ants to track the powder into the mound to effectively kill the ants in the mound, including the queen.

                By|Dec 27, 2025

                  (3)

                  What square footage does this cover?
                  ByJul 17, 2025
                  2 Answers | 
                  Answer This Question

                  Ortho Orthene Fire Ant Killer1 kills the queen, destroys the mound and treats up to 162 mounds, it is applyed to the mounds only.

                  By|Jul 17, 2025

                  Ortho Orthene Fire Ant Killer1 kills the queen, destroys the mound and treats up to 162 mounds. It is applied to the mounds only. Therefore, it doesn't cover a specific square footage, but rather targets individual mounds.

                  By|Jul 18, 2025


                    How long before pets can go around treated mounds
                    ByJun 8, 2025
                    1 Answer | 
                    Answer This Question

                    Hi, Gregg! Hi, Gregg! When used according to label instructions, our products, such as Ortho Orthene Fire Ant Killer1, pose no unreasonable health risks. At a minimum, do not allow pets, such as cats and dogs, and other non-grazing pets, into the treated area until dust from applying has settled. For best results, keep pets, such as cats and dogs, and other non-grazing pets, out of the application area for up to 24 hrs so that the mound is not disturbed, allowing the ants to track the powder into the mound to effectively kill the ants in the mound, including the queen.

                    By|Oct 28, 2025

                      (3)

                      Viewing 1-8 of 150

                      Customer Reviews

                      4.7 out of 5

                      • 4.7 out of 4,251 reviews
                      • 90% recommend this product
                      Filter by:
                      Showing 1-10 of 4,251 reviews
                      This stuff works wonders. Have no idea what is in it and it has a strong odor. After sprinkling this doom powder on the ant hill and checking the next morning there was no activity. It zapped every ant in that hill I am totally impressed by the excellence of this product. No more fire ants.
                      by
                      This works very well to keep fire ants under control. I keep a bottle of orthene fire ant killer on my riding mower. While mowing when I see a fire ant mound, I treat it immediately before I lose track of where it is located. What I don't like is that it smells really bad, and it is very very white. I wish it was a color that doesn't stand out so vividly.
                      by
                      THIS STUFF REALLY WORKS
                      Love this stuff! Got co.pletely rid of cockroaches as well! A Plus! Not even a professional pest control guy could do that! I very highly recommend
                      by
                        • Recommended
                        Difficult to open safety lid
                        This container has a yellow lid that must be squeezed on two sides to open, much like a medication bottle. However, it is very difficult to do so. In fact i was not able to get the lid to rotate no matter how hard i squeezed. I had to return all that i purchased due to this difficulty and have contacted the company. My hands a fairly large and i play racquetball and other sports. Its not a question of strength but of design.
                        by
                        Response from Ortho Consumer ServicesApr 28, 2025
                        Hi Chris! We're so sorry to hear you're having trouble opening the Ortho Orthene Fire Ant Killer. We want you to have a great experience with our products, so let's get this sorted out.

                        To open the cap, turn it counterclockwise until the cap locking tab reaches the locking tab on the container. Once in this position, the cap will stop turning counterclockwise. Then, squeeze the cap only in the spots that say "squeeze hard" using the slightly raised grip spots on the lower portion of the cap. Squeezing only in these two positions will change the shape of the cap to more of an elongated oval, allowing the locking tab on the cap to bypass the locking tab on the container.

                        We're confident in our products and offer a product guarantee. If, for any reason, you're not satisfied with the results after using this product, you're entitled to get your money back. Limitations apply. If you need further assistance, please don't hesitate to reach out to us at 877-220-3089. We're here to help! ortho
                          2 found this review helpful
                          Simple and easy to get to without any help.
                          by
                          Response from Ortho Consumer ServicesMay 11, 2024
                          Thank you for your feedback. If there is anything we can do to help you have a 5-star experience, please contact our Consumer Services team at 877-220-3089 for assistance. ortho
                          • Verified Purchase
                          angry customer
                          Fed-X Delivered to wrong address this not my address I don't have this merchandise
                          by
                          Response from Ortho Consumer ServicesJun 12, 2024
                          We apologize for the issue with your delivery. Please contact us via the contact information provided with your order.
                          ortho
                            2 found this review helpful
                            Did the job!!! I/we will no longer be bitter by those nasty fellas when getting out of my car at my sons home… It was one of my Christmas gifts to him…He actually used it Christmas morning… gotta love the Mama ?????
                            by
                            • Verified Purchase
                            Horrible
                            Burned the grass all around and did NOT kill the ants. Have used before with good results and no grass-killing, but this cannister completely burned the grass slightly wider than the product actually touched. And did absolutely nothing to the ants.
                            by
                            Response from Customer CareAug 16, 2023
                            We're sorry to read about your disappointment with Ortho Orthene Fire Ant Killer1 and appreciate your feedback. We want you to be confident in our products. For this reason, we offer a product guarantee to our consumers. At your earliest convenience, please reach out to us at 866-324-9192 if we can further assist.
                              Efficient Fire Ant Annihilator
                              The Ortho Orthene Fire Ant Killer is a powerful solution for any fire ant problem. It works swiftly, beginning to kill fire ants within an hour, and effectively destroys the queen and mound. However, the product could benefit from clearer application instructions. Despite this, it's an excellent choice for reclaiming your lawn from fire ants.
                              by
                                • Recommended
                                5 found this review helpful
                                Killing ants and grass…why
                                Kills the ants but is also killing my grass! Why is it killing my grass? Have the ingredients changed?
                                by
                                Response from Customer CareJun 15, 2023
                                We're sorry to read about your disappointment and appreciate your feedback. We want you to be confident in our products. For this reason, we offer a product guarantee to our consumers. At your earliest convenience, please reach out to us at 866-324-9192 if we can further assist.
                                  Showing 1-10 of 4,251 reviews

                                  Compare Key Features

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                                  Product Snapshot

                                  Must-have for anyone looking to quickly eliminate fire ant mounds with ease.
                                  Ideal for homeowners looking for season-long insect control, ensuring 6-month protection against 142+ pests.
                                  Great for homeowners looking for termite control, with dual-action stakes that detect and kill termites for year-round protection.
                                  Ideal for homeowners looking for year-long tree and shrub protection, simplifying plant care with easy granule application.

                                  Coverage Area

                                  Treats up to 162 mounds
                                  16, 500 sq. ft.

                                  Season-Long Protection

                                  Active Ingredients

                                  Bifenthrin
                                  Hexaflumuron
                                  Imidacloprid

                                  Rainproof

                                  Multiple Pest Control