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10 Best Post-Emergent Herbicides 2025 in the United States

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Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

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Our Top Picks

#1

Winner

Roundup Weed and Grass Killer₄ Concentrate, Use Around Flower Beds and Trees, on Walkways, and in Other Areas in Yards, 64 fl. oz.

Rating
9.7
Chosen by1,350
Mode of Action
Safety and Environmental Impact
Residual Activity

Most important from
4861 reviews

Mode of Action
The Roundup Weed & Grass Killer shows significant wilting and browning of weeds within 24 hours, with most treated plants completely dead by the end of the first week.
Safety and Environmental Impact
It's crucial to handle with care due to the glyphosate content, adhering to safety instructions and using protective gear to minimize exposure risks.
Residual Activity
One application provides long-lasting results, keeping treated areas weed-free for several weeks without leaving harmful residue in the soil.

The Roundup Weed & Grass Killer₄ Concentrate is a potent option for tackling a variety of common weeds and grasses like dandelions, crabgrass, poison ivy, and clover. It's effective in killing weeds down to the root and shows visible results within hours, making it a fast-acting solution. This product is also rainproof within 30 minutes, which adds to its reliability, especially in unpredictable weather conditions.

Additionally, it allows for flexibility with planting 1 to 30 days after application, making it suitable for gardeners who need to replant quickly after clearing weeds. You can use it in various locations around your yard, including flower beds, walkways, and large areas for lawn replacement or garden preparation. The concentrate needs to be mixed according to the label directions and can cover up to 300 sq. ft. per gallon of spray solution, offering good coverage for most residential needs.

However, the product contains chemicals like Triclopyr and Diquat Dibromide, which might raise concerns for those prioritizing environmental safety. While it's effective in killing a wide range of weeds, users should handle and apply it carefully to avoid harming desirable plants or affecting the surrounding environment. This product is best for homeowners looking for a reliable and quick-acting herbicide for their yard maintenance but may not be the ideal choice for those seeking eco-friendly solutions.

Rating
9.7
Chosen by1,350
Mode of Action
Safety and Environmental Impact
Residual Activity

Most important from
4861 reviews

Mode of Action
The Roundup Weed & Grass Killer shows significant wilting and browning of weeds within 24 hours, with most treated plants completely dead by the end of the first week.
Safety and Environmental Impact
It's crucial to handle with care due to the glyphosate content, adhering to safety instructions and using protective gear to minimize exposure risks.
Residual Activity
One application provides long-lasting results, keeping treated areas weed-free for several weeks without leaving harmful residue in the soil.
#2

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

Rating
9.4
Type of Weeds
Application Method
Residual Activity

Most important from
9794 reviews

Type of Weeds
Easily slays everything but crabgrass and nutsedge, which require specific herbicides.
Application Method
Application is easy and fast using the sprayer bottle Ortho sells.
Residual Activity
Turned weeds yellow but did not kill them off completely, requiring a second application.

The Ortho WeedClear Lawn Weed Killer Concentrate is designed to tackle a variety of common lawn weeds such as dandelion, chickweed, clover, crabgrass, and foxtail. Its fast-acting formula promises visible results with just one application, and it is formulated to kill weeds down to the roots without harming your lawn when used correctly. This makes it suitable for use on various grass types, including Bermudagrass, Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass, and Zoysiagrass.

As a concentrate, it requires proper mixing and application according to label instructions, so some effort and attention to detail are needed during use. The product covers up to 5000 square feet, providing ample coverage for most residential lawns. It is also notable for being rainfast, meaning it won't wash away easily in rain, enhancing its effectiveness. On the downside, while its safety and environmental impact are not explicitly detailed, users should handle any herbicide with care and follow all safety guidelines.

Ortho WeedClear is a reliable choice for homeowners looking to manage a variety of lawn weeds efficiently.

Rating
9.4
Type of Weeds
Application Method
Residual Activity

Most important from
9794 reviews

Type of Weeds
Easily slays everything but crabgrass and nutsedge, which require specific herbicides.
Application Method
Application is easy and fast using the sprayer bottle Ortho sells.
Residual Activity
Turned weeds yellow but did not kill them off completely, requiring a second application.
#3

BASF Drive XLR8 Crabgrass Killer for Lawn & Turf, Post Emergent Grassy & Broadleaf Weed Control, Active Ingredient Quinclorac, 30 Day Residual, Herbicide, Concentrate 64 Ounce

Rating
9.1
Type of Weeds

Most important from
2074 reviews

Type of Weeds
I have been looking for something that will take out crabgrass and I have found it. The pictures I have included are spot treatments before I sprayed everything. You'll see treated crabgrass and untreated crabgrass next to each other. I saw results within 2 days and brown in 3.

The BASF Drive XLR8 Crabgrass Herbicide is a well-regarded option for homeowners and gardeners dealing with post-emergent weed issues, specifically crabgrass. It enjoys a positive reputation with a 4.4-star rating from over 2,000 customer reviews, reflecting its efficacy and user satisfaction. This herbicide is designed to target crabgrass and other grassy weeds effectively, which makes it ideal for lawns and gardens affected by these common intruders.

The active ingredient and formulation are specialized for post-emergent use, meaning it works on weeds that have already surfaced, ensuring better control and maintenance of your outdoor spaces. The product comes in liquid form and is easy to apply with standard lawn and garden sprayers, making it accessible for users without specialized equipment. Additionally, it is rainfast, meaning it will remain effective even after rainfall, which is crucial for maintaining its efficacy in various weather conditions.

One should be mindful of safety and environmental impact. While the product is effective, it is always important to use herbicides carefully, following the manufacturer's guidelines to avoid any potential harm to desirable plants, pets, or local wildlife. The product's residual activity ensures that it continues to work over a period, reducing the frequency of reapplication and providing long-term weed control. On the downside, the herbicide has a relatively high price point, which might be a consideration for budget-conscious users. Furthermore, it is primarily effective on grassy weeds, which might limit its use if you have a diverse array of weeds to tackle. In summary, the BASF Drive XLR8 is a reliable and efficient choice for those struggling with crabgrass and similar weeds, offering ease of use, durability against rain, and long-lasting effects. However, careful application and consideration of its cost are essential.

Rating
9.1
Type of Weeds

Most important from
2074 reviews

Type of Weeds
I have been looking for something that will take out crabgrass and I have found it. The pictures I have included are spot treatments before I sprayed everything. You'll see treated crabgrass and untreated crabgrass next to each other. I saw results within 2 days and brown in 3.

Buying Guide for the Best Post-Emergent Herbicides

Choosing the right post-emergent herbicide is crucial for effectively managing weeds in your garden, lawn, or agricultural field. Post-emergent herbicides are designed to target and kill weeds that have already emerged from the soil. To select the best product for your needs, you should consider several key specifications. Understanding these specifications will help you make an informed decision and ensure that the herbicide you choose is effective and safe for your specific situation.
Type of WeedsPost-emergent herbicides can be selective or non-selective. Selective herbicides target specific types of weeds without harming the surrounding plants, making them ideal for lawns and gardens. Non-selective herbicides kill all vegetation they come into contact with, which is useful for clearing areas completely. Identify the types of weeds you need to control and choose a herbicide that is effective against those specific weeds.
Mode of ActionThe mode of action refers to how the herbicide affects the weed. Some herbicides are systemic, meaning they are absorbed by the plant and move throughout its tissues, killing it from the inside out. Others are contact herbicides, which kill only the parts of the plant they touch. Systemic herbicides are generally more effective for perennial weeds with deep root systems, while contact herbicides are suitable for annual weeds and quick knockdown.
Application MethodHerbicides can be applied in various ways, including sprays, granules, and concentrates. Sprays are easy to apply and provide good coverage for large areas. Granules are convenient for spot treatments and can be applied with a spreader. Concentrates need to be mixed with water and are suitable for larger areas or heavy infestations. Consider the size of the area you need to treat and your preferred application method when choosing a herbicide.
RainfastnessRainfastness refers to the time it takes for the herbicide to become resistant to being washed away by rain. This is important because if it rains shortly after application, the effectiveness of the herbicide can be reduced. Look for products with a short rainfast period if you live in an area with frequent rainfall, or plan your application during a dry spell to ensure the herbicide has enough time to work.
Safety and Environmental ImpactConsider the safety of the herbicide for humans, pets, and the environment. Some herbicides can be toxic and require careful handling and application. Look for products that are labeled as safe for use around children and pets if this is a concern. Additionally, consider the environmental impact of the herbicide, such as its potential to contaminate water sources or harm beneficial insects. Choose a product that aligns with your safety and environmental values.
Residual ActivityResidual activity refers to how long the herbicide remains active in the soil after application. Some herbicides break down quickly and have little to no residual activity, making them safer for use in areas where you plan to replant soon. Others have long-lasting effects that can prevent weed regrowth for an extended period. If you need long-term weed control, choose a herbicide with a longer residual activity. If you plan to replant or rotate crops, opt for one with minimal residual effects.

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