Best Ortho Weed Killers of 2026

Steven Taylor Avatar
Steven Taylor
Last Updated: Jan 15, 2026

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Ortho offers a range of weed killers that are designed to effectively eliminate weeds from lawns, gardens, and other outdoor spaces. These products are formulated to target specific types of weeds, such as broadleaf weeds or grassy weeds, and can be applied using a variety of methods, including sprays, granules, and concentrates. Ortho weed killers are easy to use and provide long-lasting results, helping homeowners maintain a beautiful and healthy outdoor environment. Whether you're dealing with dandelions, crabgrass, or other common weeds, Ortho has a solution that can help you achieve a weed-free lawn and garden.

At a Glance: Our Top Picks

Ortho WeedClear Lawn Weed Killer Concentrate Cover #TOP 1
Ortho WeedClear Lawn Weed Killer Concentrate
ftb score rating icon 9.8
Ortho GroundClear Weed and Grass Killer2 Concentrate Cover #TOP 2
Ortho GroundClear Weed and Grass Killer2 Concentrate
ftb score rating icon 9.7
Ortho GroundClear Super Concentrate Weed & Grass Killer Cover #TOP 3
Ortho GroundClear Super Concentrate Weed & Grass Killer
ftb score rating icon 9.5

Top 10 Ortho Weed Killers

Ortho WeedClear Lawn Weed Killer Concentrate

0447905
Transparent
32 fl oz
Ortho WeedClear Lawn Weed Killer Concentrate Cover
Ortho WeedClear Lawn Weed Killer Concentrate, Kills Crabgrass, Dandelion and Clover, 32 fl. oz.

Ortho WeedClear Lawn Weed Killer Concentrate is a fast-acting formula that kills weeds in your lawn without harming the grass. It can kill dandelion, chickweed, clover, crabgrass, and foxtail to the root in just one application. It can be used on various grass types and comes in a concentrate form, so make sure to read the product label for specific application instructions.

What We Like
Fast-acting formula
Kills weeds to the root
Won't harm the lawn
#TOP 2

Ortho GroundClear Weed and Grass Killer2 Concentrate

4650306
32 oz.
Ortho GroundClear Weed and Grass Killer2 Concentrate Cover
Ortho GroundClear Weed and Grass Killer2 Concentrate, Kills Dandelions, Chickweed, Crabgrass, Moss and More in Patios and Landscapes, OMRI Listed, 32 fl. oz.

The Ortho GroundClear Weed Killer is a fast-acting solution that works quickly to control unwanted weeds and grass. Once applied, the product absorbs on contact and starts showing results in about 15 minutes, helping you see quick progress. It becomes rainproof within two hours, so you don’t have to worry about losing effectiveness if it rains shortly after application. This product is safe for use around your home since people and pets can enter treated areas as soon as the spray has dried. You can use it year-round on small, actively growing weeds by diluting the concentrate according to the instructions. It’s perfect for walkways, driveways, and landscape beds, but should not be used on lawns or grass you want to keep.

What We Like
Fast-acting control
Rainproof in 2 hours
Safe for people and pets
Year-round use
#TOP 3

Ortho GroundClear Super Concentrate Weed & Grass Killer

4651005
32oz
Ortho GroundClear Super Concentrate Weed & Grass Killer Cover
Ortho GroundClear Weed & Grass Killer Super Concentrate1 Fast-Acting Formula Kills the Toughest Weeds and Grasses, 32 fl. oz.

Ortho GroundClear Weed Killer offers a powerful solution to eliminate tough weeds and grasses quickly. Its fast-acting formula works on contact, helping you see weeds wilt within hours and completely disappear in one to two weeks. This product targets the roots, ensuring long-lasting results and reducing the chance of regrowth. Plus, it becomes rainproof just 15 minutes after application, so you don’t have to worry about losing effectiveness if the weather changes. For best results, apply it to active weeds when temperatures are above 60°F, making it a convenient and efficient choice for maintaining your outdoor spaces.

What We Like
Fast-acting formula
Root-targeting action
Rainfast in 15 minutes
Kills tough weeds and grasses
#TOP 4

Ortho WeedClear Weed Killer for Lawns Concentrate

0204810
clear
1 gal.
Ortho WeedClear Weed Killer for Lawns Concentrate Cover
Ortho WeedClear Weed Killer for Lawns Concentrate, Kills Dandelion and Clover, 1 gal.

Ortho WeedClear Weed Killer for Lawns Concentrate is a powerful herbicide that kills over 250 common weeds, including dandelions, clover, poison ivy, sumac, chickweed, and dollarweed. It is designed for both Northern and Southern lawns, and can treat up to 64,000 sq. ft. with just one gallon. Customers have reported visible results in hours, and have had success in eliminating Creeping Charlie, dandelion, Buckhorn Plaintain, and clover. However, some customers have noted that the product is not as effective against Common Plantain.

What We Like
Kills over 250 common weeds
Designed for both Northern and Southern lawns
Visible results in hours
#TOP 5

Ortho GroundClear Poison Ivy & Brush Killer Concentrate

475905
32 oz.
Ortho GroundClear Poison Ivy & Brush Killer Concentrate Cover
Ortho GroundClear Poison Ivy and Tough Brush Killer1 - Concentrate, Makes 8 Gallons, Kills Poison Ivy, Poison Oak, Kudzu & Wild Blackberry, Kills to the Root, 32 fl. oz.

Ortho GroundClear Brush Killer is a powerful concentrate designed to help you control over 60 tough weeds and brush, including poison ivy, poison oak, kudzu, and wild blackberry. This product works by entering the leaves and moving throughout the plant, which means you can expect to see the weeds wilt or turn yellow within 2 to 6 weeks. It’s also rainproof after just 2 hours, so you don’t have to worry about losing effectiveness if it rains shortly after application. For best results, apply it to actively growing weeds in non-garden areas like around your home, cabin, or fence lines.

What We Like
Controls over 60 tough weeds
Systemic action through leaves
Visible results in weeks
Rainproof after 2 hours
Effective on non-garden areas
#TOP 6

Ortho Grass B Gon Garden Grass Killer 0438580

0438580
Ortho Grass B Gon Garden Grass Killer 0438580 Cover
Ortho 0438580 Grass B Gon Garden Grass Killer Ready-to-Use, 24-Ounce (2 Pack)

The Ortho Grass B Gon Killer is a ready-to-use weed control solution designed to target common grassy weeds like crabgrass, tall fescue, bermuda, and Kentucky bluegrass. This product lets you easily treat your garden without worrying about harming your other plants, making it safe to use around ground covers, flower beds, shrubs, and trees. After application, it becomes rainproof within just one hour, so you don’t have to wait long or worry about losing effectiveness if it rains. Plus, it comes in a convenient 24-ounce size and is sold in a pack of two, giving you enough product for multiple treatments.

What We Like
Ready-to-use formula
Controls multiple grassy weeds
Safe for landscape plants
Rainfast in 1 hour
Pack of two bottles
#TOP 7

Ortho B-Gon Grass Killer for Landscapes

Ortho B-Gon Grass Killer for Landscapes Cover
Ortho Lands B-Gon Grass Killer for Landscapes (4)

Ortho B-Gon Grass Killer is designed to help you get rid of unwanted grassy weeds without damaging your favorite ornamental plants. It works well around various landscape plants such as ground covers, evergreens, shrubs, and shade trees, making it a versatile choice for your garden. This product targets both annual and perennial grassy weeds, so you can maintain a clean and healthy lawn all season long. Plus, it comes ready to use, saving you time and effort since there's no need for mixing. With Ortho B-Gon Grass Killer, you can protect your landscape while effectively controlling grassy weeds.

What We Like
Selective grass control
Safe for ornamentals
Effective on annual and perennial weeds
Ready-to-use convenience
#TOP 8

Ortho WeedClear Lawn Weed Killer Refill 1.33 gal

447605
1-Pack
Ortho WeedClear Lawn Weed Killer Refill 1.33 gal Cover
Ortho WeedClear Lawn Weed Killer Ready-To-Use Refill, Kills Crabgrass, Dandelion and Clover, 1.33 gal

The Ortho WeedClear Lawn Killer is designed to help you get rid of common lawn weeds like crabgrass, dandelions, and clover quickly and effectively. It works fast, killing weeds down to their roots with just one application, so you don’t have to keep reapplying. This product is safe to use on many types of lawn grasses such as Bermudagrass and Kentucky Bluegrass, so you can treat weeds without worrying about damaging your lawn. It’s easy to use as a spray and works best on young, actively growing weeds in spring or fall, making your lawn care routine simple and efficient.

What We Like
Effective on common lawn weeds
Fast root-level weed control
Safe for various lawn grasses
Easy spray application
#TOP 9

Ortho Weed B Gon Plus Crabgrass Control 32 oz

9906010
Brown/A
32 oz.
Ortho Weed B Gon Plus Crabgrass Control 32 oz Cover
Ortho Weed B Gon Plus Crabgrass Control Concentrate2, 32 oz.

The Ortho Weed B Gon Plus is designed to help you tackle common lawn weeds like crabgrass and dandelions effectively. It works by targeting the roots, ensuring that weeds are removed completely and don’t grow back quickly. This product covers over 200 types of weeds, giving you a broad solution for your lawn care needs. Plus, you can trust that it won’t damage your grass when applied as instructed, so you can protect your lawn while keeping it weed-free. It starts working right away, giving you fast results and a healthier yard.

What We Like
Effective on crabgrass and dandelions
Root-level weed elimination
Covers 200+ weed types
Lawn-safe formula
Fast-acting results

Ortho Weed B Gon Chickweed, Clover & Oxalis Killer for Lawns

0398710
Violet
32 Oz (Pack of 2)
Ortho Weed B Gon Chickweed, Clover & Oxalis Killer for Lawns Cover
Ortho Weed B Gon Chickweed, Clover & Oxalis Killer for Lawns, 32 Oz. (Pack of 2)

Ortho Weed Killer is a powerful solution for eliminating Chickweed, Clover, and Oxalis in your lawn. It ensures that weeds are completely destroyed down to their roots, preventing regrowth. The best part is that it won't cause any harm to your precious lawn, keeping it healthy and vibrant. Additionally, this product is rainproof within 6 hours, offering you quick results even if it rains shortly after application. With Ortho Weed Killer, you can say goodbye to pesky weeds and hello to a beautiful, weed-free lawn.

What We Like
Kills to the roots
Safe for lawns
Rainproof in 6 hours
Buying Guide Image

What You Need to Know About Ortho Weed Killers

Introduction

If you have weeds growing in your garden or lawn, using an ortho weed killer can be an effective way to get rid of them. But with so many different products on the market, it can be difficult to know which one to choose. In this article, we'll go over some important factors to consider when selecting an ortho weed killer, as well as provide some tips on how to use it safely and effectively.

Choosing the Right Product

The first thing to consider when choosing an ortho weed killer is the type of weeds you want to target. Different products are designed to kill different types of weeds, so it's important to choose one that is specifically formulated to target the weeds in your garden or lawn. For example, if you have broadleaf weeds such as dandelions, you'll want to choose a product that is labeled as being effective against these types of weeds.

Another important factor to consider is the type of application. Ortho weed killers come in different forms, including liquids, granules, and sprays. Each type has its own advantages and disadvantages, so it's important to choose the one that is best suited to your needs. For example, liquid weed killers are easy to apply and can be quickly absorbed by the weeds, but they can also be harmful to other plants if not applied carefully. Granular weed killers are slow-acting but can be easier to apply evenly, and sprays are convenient for spot-treating specific weeds.

Using Ortho Weed Killers Safely and Effectively

Once you've chosen the right product, it's important to use it safely and effectively. Here are some tips to help you do that:

  • Follow the instructions on the label carefully. This will ensure that you are using the product in the right amount and in the right way.

  • Apply the weed killer when the weather is calm and dry. Wind and rain can cause the product to drift or wash away, reducing its effectiveness.

  • Wear protective clothing, such as gloves, long sleeves, and pants, to avoid getting the product on your skin.

  • Keep children and pets away from the area where you are applying the weed killer.

  • Avoid applying the weed killer near desirable plants, as it can harm them if it comes into contact with their leaves or roots.

  • Wait for the weed killer to take effect before mowing or watering the area. This will give it time to work its way into the weeds and kill them.

Conclusion

In conclusion, choosing the right ortho weed killer and using it safely and effectively can help you get rid of weeds in your garden or lawn. By considering the type of weeds you want to target and the type of application, and by following the instructions on the label, you can effectively control weeds and keep your garden or lawn looking its best.

Frequently Asked Questions (FAQs)

1. How long does it take for Ortho Weed Killer to kill weeds?

Ortho Weed Killer, specifically Ortho Weed B-Gon Lawn Weed Killer, typically shows visible results within hours. However, it may take around 2-4 weeks for the product to completely kill the weeds. While it may not be as fast-acting as some other weed controls, Ortho Weed Killer has proven to be highly effective.

2. How long until Ortho Weed Killer is safe for dogs?

After applying Ortho Weed Killer, it is recommended to keep dogs off the sprayed grass areas for at least two days or until the product has been completely absorbed. It's also advised to place the dog's bowls and toys away from treated areas. If there is any contact between your dog and the treated grass, it's recommended to wash their belly and legs. It's important to avoid products that contain carcinogenic chemicals.

3. How often can you use Ortho Weed Killer?

For Ortho Weed B Gon Weed Killer For Lawns Concentrate 2, the maximum number of broadcast applications per year is two. It's important to follow the instructions on the product label and not exceed the recommended usage to ensure the best results.

4. How long does Ortho spray last?

Ortho spray provides a bug barrier that can last up to 12 months for indoor surfaces, protecting against ants, roaches, and spiders. To apply, hold the sprayer 12 inches from the surface and create a 4-inch wide band along the interior of the home, targeting areas where insects are commonly found.

5. How long is Ortho spray good for?

Ortho Home Defense Insect Killer for Indoor & Perimeter2 has a minimum shelf life of 3 years when stored properly. However, the product may often last longer. It's important to note that after 3 years, the effectiveness of the product may gradually decrease.

Editor's Notes

During our Ortho weed killer research, we found 24 Ortho weed killer products and shortlisted 10 quality products. We collected and analyzed 156,922 customer reviews through our big data system to write the Ortho weed killers list. We found that most customers choose Ortho weed killers with an average price of $21.91.

The Ortho weed killers are available for purchase. The top 10 picks range in price from a low of $12.00 to a high of $38.00, find the one that fits your budget. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Steven Taylor Avatar

Steven Taylor grew up in a small town called Beaufort in South Carolina and his passion for building and woodworking has led him to master the latest garden gadgets. He always holds every chance to patch up or sand down his beloved garden. There are various novel technologies in his articles.