If you’re looking for the best post emergent weed killer, there are several factors that you need to consider before making your purchase. Firstly, you need to identify what type of weeds you are dealing with as different weed killers work in different ways. Secondly, you should consider the size of your lawn or garden as some weed killers are more effective in smaller spaces, while others can work on larger areas. Finally, it is important to think about whether you need a selective or non-selective weed killer.

When it comes to choosing the best post emergent weed killer, it is important to consider factors such as effectiveness, application convenience, and safety. Look for products that are easy to apply and come with clear instructions for use. In addition, consider whether the weed killer is safe for use around pets, children, and other plants in your garden.

If you’re not sure which post emergent weed killer is right for you, here are some questions to consider. Do you need a product that kills all types of weeds or just specific types? How quickly do you need to eliminate the weeds? How often will you need to apply the weed killer to maintain a weed-free lawn or garden? By answering these questions, you can find the best post emergent weed killer for your unique needs.

10 Best Post Emergent Weed Killer

# Product Image Product Name Product Notes Check Price
1
Ideal for killing unwanted grass in driveways, sidewalks, and other non-crop areas.
2
The product is ideal for killing broadleaf weeds in lawns, pastures, and non-crop areas.
3
This product is ideal for killing weeds in St. Augustine grass.
4
Ideal for controlling weeds in warm-season turf and ornamental crops.
5
It is ideal for killing weeds in lawns and gardens.
6
The product is ideal for controlling broadleaf weed growth in lawns of up to 5,000 square feet.
7
Ideal for controlling weeds in both cool and warm weather, while remaining safe for use on lawns.
8
This herbicide is ideal for killing all types of weeds and vegetation after they have already emerged.
9
Product is ideal for killing crabgrass and weeds in lawns quickly while maintaining safety through natural ingredients.
10
Ideal for controlling weeds in turfgrass, including crabgrass, clover and dandelions.
Ideal for killing unwanted grass in driveways, sidewalks, and other non-crop areas.
The product is ideal for killing broadleaf weeds in lawns, pastures, and non-crop areas.
This product is ideal for killing weeds in St. Augustine grass.
Ideal for controlling weeds in warm-season turf and ornamental crops.
It is ideal for killing weeds in lawns and gardens.
The product is ideal for controlling broadleaf weed growth in lawns of up to 5,000 square feet.
Ideal for controlling weeds in both cool and warm weather, while remaining safe for use on lawns.
This herbicide is ideal for killing all types of weeds and vegetation after they have already emerged.
Product is ideal for killing crabgrass and weeds in lawns quickly while maintaining safety through natural ingredients.
Ideal for controlling weeds in turfgrass, including crabgrass, clover and dandelions.

1. Hi Yield 16 Oz Grass Killer

Introducing a powerful selective post-emergent herbicide that expertly targets and eliminates unwanted grass growth. This innovative product can be safely applied in and around vegetable gardens, trees, shrubs, and ornamental plants, providing a precise and effective solution to weed control.

Within just two days following application, this herbicide stops the growth of weed grasses, ensuring that your plants remain healthy and vibrant. With the ability to make up to 16 gallons of spray solution, this concentrate provides a cost-effective and efficient way to maintain your garden and landscaping.

Application instructions may vary depending on the dimensions and method of application, so be sure to consult the label for detailed guidelines on how to use this product effectively. With its reliable and potent formula, this selective post-emergent herbicide is a must-have for any gardener or landscaper looking to maintain a beautiful and healthy outdoor space.

2. Southern Ag Amine 2,4-D Weed Killer, 32oz – Quart

Looking for a reliable solution to control broadleaf weeds in your lawn, golf course, park, cemetery, or ornamental turf? Look no further than this powerful selective broadleaf weed control product.

This versatile weed control formula is designed for use in a variety of settings, including pastures and rangeland. It features a potent blend of active ingredients that work together to target and eliminate a wide range of broadleaf weeds, while leaving your grass and other turf intact.

Whether you're dealing with dandelions, clover, plantain, or other common broadleaf weeds, this selective weed control product is up to the task. Its easy-to-use formula can be applied directly to affected areas, and it provides fast, effective results that you can see in just a few days.

In addition to its impressive weed-fighting capabilities, this broadleaf weed control product is also known for its safety and ease of use. It is formulated to be non-toxic and environmentally friendly, making it a great choice for use in public areas like parks and golf courses.

So if you're tired of struggling with unsightly broadleaf weeds in your lawn or turf, give this selective weed control product a try. With its powerful formula, fast results, and easy application, it's the perfect solution for anyone looking to keep their turf looking beautiful and weed-free.

3. Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon

This herbicide is a powerful solution for eliminating a variety of broadleaf weeds, making it an essential tool for any lawn care enthusiast. Its effectiveness extends beyond traditional grass types, as it can also be used in centipede grass to achieve the same results. Additionally, this herbicide provides effective suppression of crabgrass, which is notorious for its invasive tendencies.

One of the key benefits of this herbicide is its ability to control both emerged weeds and those that are just beginning to sprout from seed. This ensures that your lawn remains free of unwanted growth, allowing your desired vegetation to thrive.

With its potent formula, this herbicide is a reliable option for tackling even the toughest weed infestations. Its broad-spectrum approach targets a wide range of weeds, making it a versatile solution for any lawn care needs.

4. Hi-Yield Atrazine Weed Killer

The Atrazine herbicide is an effective solution for controlling or suppressing an array of weeds in St. Augustine and Centipede grass. With a potent 4.00% concentration of active ingredient, this herbicide is designed to effectively eliminate weeds and prevent their regrowth.

This herbicide can effectively target and control a wide variety of weeds, including Annual Bluegrass (Poa annua), Chickweed (Common and Mouseear), Henbit, Moneywort, Pennywort (Dollarweed), Spurge, and Annual. It is a versatile solution that can provide long-lasting results for your lawn.

The Atrazine herbicide is specially formulated to provide excellent performance without damaging your St. Augustine or Centipede grass. When used according to the instructions, it can effectively eliminate weeds while promoting healthy growth of your lawn.

This herbicide is easy to use and can be applied with a sprayer or spreader. It is recommended to apply during the growing season for best results. Additionally, it is important to follow the manufacturer's instructions carefully to ensure the safety and effectiveness of the product.

5. Bonide 066 916126 Weed Beater Plus Ready-To-Spray, 32 Oz

Looking for an effective solution to control weed growth in your lawn? Look no further than this powerful herbicide spray. With the ability to kill over 200 types of lawn weeds with just one easy step, this product is a must-have for any homeowner looking to keep their lawn looking its best.

Designed to be safe for grass, this herbicide targets the weed down to the root without harming the surrounding lawn when used according to the instructions. It's important to note that this product is not recommended for use on St. Augustine or Centipede grass types.

This post-emergent weed control spray is intended for use after the weeds have already sprouted. It works by entering the weeds through their leaves and moving inside, eventually reaching the roots and effectively killing the weed.

For easy application, this herbicide spray comes with a convenient garden hose nozzle. Simply connect the 32 oz. container to your garden hose and the product will mix automatically with the water as you evenly apply it to the desired areas.

With its industrial strength formula, just one quart of this herbicide spray can cover up to 6,600 square feet of lawn. Say goodbye to unsightly weeds and hello to a beautiful, healthy looking lawn with this powerful herbicide spray.

6. Jonathan Green (12195) Lawn Weed Control – Post Emergent Broadleaf Weed Killer (5,000 Sq. Ft.)

This highly effective weed control product is perfect for use all year round. It provides a powerful solution to combat the growth of over 200 types of weeds, making it an ideal choice for homeowners and gardeners alike. With the ability to cover up to 5,000 square feet, this product is perfect for larger outdoor spaces.

One of the key benefits of this weed control product is that it is completely fertilizer free. This makes it a great choice for those who want to keep their gardens chemical-free and safe for children and pets.

With its advanced formula, this weed control product works quickly and effectively to eliminate even the toughest weeds. Its parameters and specifications are designed to provide superior results, while also being easy to use.

Whether you are dealing with grassy weeds, broadleaf weeds, or any other type of invasive plant, this powerful product is up to the task. So why wait? Take control of your outdoor space today with this highly effective and reliable weed control solution.

7. Weed Control All-In-One For Lawn – Bonide Prozone

Weed Beater Complete is the perfect solution for homeowners who want to keep their lawns free of pesky and stubborn weeds. With just a 10-pound bag of this product, you can protect up to 5,200 square feet of your property, ensuring that your lawn remains healthy and beautiful.

The unique formula of Weed Beater Complete takes care of both pre-emerging and post-emerging control of grassy and broadleaf weeds. This feature makes it a versatile product that can effectively control a range of weeds, including crabgrass, nutsedge, goosegrass, ground ivy, and many more. Its systemic action penetrates from the leaves down to the roots, ensuring that even the toughest weeds are eliminated.

Unlike most weed killer concentrate formulas, Weed Beater Complete is a dry-application granule that can be used on both warm and cool season grasses. This feature makes it easy to apply and ensures that it will work equally well on both types of grasses.

Weed Beater Complete is conveniently ready to use when it arrives, making it a hassle-free solution for homeowners. Simply apply the product exactly as directed on the label for the best results. With its wide range of control and granular application, Weed Beater Complete is the perfect product for keeping your lawn weed-free and healthy.

8. Monterey Lg5190 Remuda Full Strength, Non-Selective Post Emergence Herbicide, 1 Gal

The Remuda Full Strength weed control is a highly effective herbicide that can be used to eliminate both annual and perennial grasses, including stubborn weeds like crabgrass, thistle, clover, creeping charlie, and poison ivy.

This post-emergent herbicide is made from a 41% glyphosate concentrate with surfactant, which is the most widely used herbicide globally. The herbicide is designed for use during active growth of unplanted areas and is safe to use around flowerbeds, trees, and shrubs. It can also be used to control brush and tree species.

As a non-selective herbicide, Remuda Full Strength is capable of killing numerous types of weeds. It works great for vegetation management, ornamental weed control, and non-planted lawn areas.

Using this herbicide is simple and straightforward. All you need to do is mix the Remuda with the appropriate amount of water for your desired strength level and apply it to emerged weeds. The herbicide can be easily applied as a spray.

It is important to note that the spray solution is only safe for people and pets once it has completely dried. This ensures that there is no risk of accidental exposure to the herbicide.

9. Agralawn Crabgrass Killer, Fast-Acting 2 Lb Bottle, Naturally Safer Weed Killer

The grass-friendly solution you've been searching for is here! This herbicide is safe to use on a variety of grass types, including St. Augustine, Common Bermuda, Bahia, and Centipede, without causing much reaction or yellowing. Its unique formula targets weeds and their roots by being absorbed through the leaves.

What's more, this product is exempt from EPA registration under the Federal Insecticide, Fungicide, and Rodenticide Act, Section 25(b) rule. This means you can rest assured that it has been tested and approved for safe use.

Say goodbye to pesky weeds without harming your St. Augustine grass. This post-emergent herbicide is the perfect solution to achieving a weed-free lawn.

10. Tenacity Turf Herbicide – 8 Ounces (Packaging May Vary)

Tenacity is a powerful herbicide that effectively controls weeds in turfgrasses. This systemic herbicide is designed for both pre-emergence and post-emergence use, providing selective contact and residual control against a wide range of weeds.

When applied as a pre-emergent, Tenacity is absorbed by weeds during their emergence from the soil, making it an effective tool for controlling problematic weeds. The herbicide's active ingredient, Mesotrione, makes up 40% of the formula, ensuring potent and reliable weed control.

Tenacity is highly effective against a variety of common weeds, including Barnyardgrass, Carpetweed, Chickweed, Clover, Crabgrass (large & smooth), Dandelion, Foxtail, Goosegrass, Henbit, Yellow Nutsedge, Purslane, Thistle, Wild Carrot, and several others.

For best results, it is essential to store Tenacity correctly. The date printed on the bottle is the manufacturing date, not the expiration date, and the herbicide has a shelf life of 5-8 years when properly stored. It is crucial to keep the herbicide out of direct sunlight and extreme temperatures to maintain its effectiveness.

Best Post Emergent Weed Killer FAQs

What is the best post emergent weed killer for broadleaf weeds?

When it comes to post emergent weed killers for broadleaf weeds, there are several options available in the market. However, the best option depends on several factors such as the type of broadleaf weed, the area to be treated, and environmental conditions.

One of the most effective post emergent weed killers for broadleaf weeds is 2,4-D Amine. This herbicide is particularly effective against weeds such as dandelion, clover, and chickweed. It generally works best when applied during the active growth stages of weeds when they are young and actively growing.

Another popular option is Triclopyr, which is effective against a broad range of broadleaf weeds. It is often used in combination with 2,4-D Amine for best results. Triclopyr works by disrupting the growth process of the weeds, leading to their eventual demise.

It is important to note that post-emergent herbicides can have negative impacts on the environment and should be used with caution. It is always a good idea to read and follow the instructions on the label carefully and wear protective gear when applying these products.

What is the best post emergent weed killer for controlling crabgrass?

When it comes to controlling crabgrass, selecting the right post-emergent weed killer is crucial. One of the most effective post-emergent herbicides for crabgrass control is Quinclorac. Quinclorac is a selective herbicide that works by targeting the weed's growth hormones, which results in stunted growth and eventual death. It is particularly effective against crabgrass, which is a common and stubborn weed that can quickly take over lawns and gardens.

Another popular post-emergent herbicide for crabgrass control is Mesotrione. This herbicide is also selective and works by inhibiting the weed's photosynthesis process. Mesotrione is effective against a wide range of broadleaf and grassy weeds, including crabgrass.

It's important to note that post-emergent herbicides work best when applied to young, actively growing weeds. Therefore, it's recommended to apply the herbicide when the crabgrass is still in its early stages of growth. Additionally, always follow the manufacturer's instructions and safety precautions when using any herbicide.

What is the best post emergent weed killer for controlling dandelions?

When it comes to controlling dandelions, there are several post-emergent weed killers that can effectively eliminate them from your lawn. The best weed killer for dandelions would be a selective herbicide that targets broadleaf weeds without harming your grass. Two of the most popular and effective options are 2,4-D and dicamba-based herbicides.

2,4-D is a systemic herbicide that works by disrupting the growth of the dandelion's cells, causing it to die. Dicamba-based herbicides work in a similar way, but also have a residual effect that prevents new dandelion growth for weeks after application.

It's important to follow the instructions on the label carefully and apply the weed killer when the dandelions are actively growing. Additionally, it's recommended to avoid mowing the lawn for a few days before and after application to allow the herbicide to fully penetrate the dandelions.

Overall, the best post-emergent weed killer for dandelions will depend on your specific situation and preferences. Consulting with a lawn care professional can help you determine the best option for your lawn.

What is the best post emergent weed killer for use on driveways and sidewalks?

When it comes to choosing the best post emergent weed killer for driveways and sidewalks, it's important to consider factors such as effectiveness, safety, and ease of use. One popular option is glyphosate-based herbicides, such as Roundup, which are known for their effectiveness in killing weeds down to the root. However, it's important to follow safety precautions and avoid getting the product on any desirable plants or grass.

Another option is a vinegar-based weed killer, such as Green Gobbler, which is a natural and eco-friendly alternative to chemical herbicides. These products work by desiccating the weeds, causing them to dry out and die. While they may not be as effective as chemical options, they are a safer choice for use around pets, children, and other plants.

Ultimately, the best post emergent weed killer for your driveway and sidewalks will depend on your specific needs and preferences. It's important to read product labels carefully, follow safety instructions, and choose a product that will effectively target the types of weeds you are dealing with.

What is the best post emergent weed killer for use on flower beds?

When it comes to choosing the best post emergent weed killer for flower beds, there are several factors to consider. Firstly, it is important to choose a product that is specifically formulated for use on flower beds and is safe for use around desirable plants. Secondly, the weed killer should be effective against a wide range of weeds commonly found in flower beds, including broadleaf weeds and grasses. Thirdly, the product should be easy to apply and should not require multiple applications to achieve results.

One of the top post emergent weed killers for flower beds is the Bonide Weed Beater Ultra. This product is safe for use around flowers and other desirable plants and is effective against a wide range of weeds, including chickweed, dandelion, and clover. It comes in a convenient spray bottle and can be easily applied to the affected areas. Another great option is the Preen Garden Weed Preventer Plus Plant Food, which not only controls weeds but also provides nutrients to your plants. It is easy to use and can be applied directly to the soil around your flowers. Ultimately, the best post emergent weed killer for your flower beds will depend on your specific needs and preferences, so be sure to do your research and choose a product that is right for you.

Which post emergent weed killer is most effective for killing clover?

When it comes to choosing the most effective post emergent weed killer for killing clover, there are several options available in the market. However, the one that stands out is a selective herbicide called Triclopyr. This herbicide is specifically designed to target broadleaf weeds like clover and dandelions while leaving the surrounding grass unharmed.

Triclopyr works by mimicking the natural hormone found in plants called auxin, which is responsible for controlling growth. When applied to the leaves of clover, the herbicide is absorbed and transported down to the roots, where it disrupts the plant's ability to produce essential proteins and enzymes, eventually killing the weed.

It's worth noting that Triclopyr is a powerful herbicide and should be used with caution. Follow the instructions carefully, and make sure to apply it during the recommended time and in the correct dosage. Additionally, consider using organic alternatives like vinegar or boiling water if you prefer a more natural approach to weed control.

Which post emergent weed killer is most effective for killing stubborn weeds?

There are several post-emergent weed killers available in the market, and each one has its own unique formula and mode of action. However, when it comes to killing stubborn weeds, there are a few that stand out as the most effective options. One of the most popular and effective post-emergent weed killers is glyphosate, which is the active ingredient in popular brands like Roundup and Killzall. Glyphosate works by attacking the plant's root system, making it an excellent choice for stubborn weeds that are difficult to remove manually. Another effective option is 2,4-D, which is often used in combination with other herbicides to create a more potent weed-killing formula. For best results, it's important to choose a post-emergent weed killer that is formulated specifically for the types of weeds you're dealing with, and to follow the application instructions carefully to ensure maximum effectiveness.

Which post emergent weed killer is safe for use on lawns?

There are several post-emergent weed killers that are safe for use on lawns. Some of the most commonly used and effective options include 2,4-D, dicamba, and MCPP. These chemicals are selective herbicides that target broadleaf weeds while leaving grasses unharmed. When used correctly and according to the manufacturer's instructions, they can be very effective at eliminating weeds without causing damage to your lawn.

It's important to note that while these chemicals are generally safe for use on lawns, they should be used with caution. Be sure to read and follow all instructions carefully, and take steps to minimize exposure to pets and children. Additionally, it's always a good idea to wear protective clothing and gear when applying herbicides to your lawn.

If you have concerns about using chemical herbicides on your lawn, there are also organic and natural options available. These may be less potent than chemical herbicides, but they can still be effective at controlling weeds over time. Some popular options include corn gluten meal, vinegar, and boiling water.

Which post emergent weed killer is the fastest acting?

There are several post-emergent weed killers available in the market, each claiming to be the best and fastest acting. However, the speed of action depends on several factors, including the type of weed, the weather conditions, and the application method.

Glyphosate is considered one of the fastest-acting post-emergent weed killers available. It is a non-selective herbicide that targets all types of weeds and grasses. Glyphosate works by inhibiting an enzyme that is essential for plant growth, leading to death within a few days of application.

Another fast-acting post-emergent herbicide is Diquat. It is a contact herbicide that works by drying out the leaves of the weed, causing it to die within hours of application. However, Diquat is a non-selective herbicide and can harm nearby plants, so it should be used with caution.

Overall, the speed of action of a post-emergent weed killer depends on several factors, and the best way to choose the right one is to consider the type of weed, the weather conditions, and the application method. It is always recommended to read the label instructions carefully before applying any herbicide.

Which post emergent weed killer is the most affordable?

There are several post-emergent weed killers available in the market, and their prices may vary depending on the brand, quantity, and effectiveness. However, if affordability is your primary concern, then you can consider using a generic brand of post-emergent weed killer. These products are often cheaper than their branded counterparts and can be just as effective in killing weeds.

Glyphosate-based herbicides are also commonly used as post-emergent weed killers and are relatively affordable. Glyphosate is a non-selective herbicide that kills virtually all types of plants, including weeds. Products that contain glyphosate can be found in most garden centers and hardware stores, and they are generally cost-effective.

It's worth noting that while affordability is important, it's essential to choose a post-emergent weed killer that is safe for the environment and doesn't harm other plants or animals in your garden. Therefore, it's essential to read the label and instructions carefully before using any weed killer product.

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