If you're looking for the best post emergent herbicide for St. Augustine grass, then you've come to the right place. When it comes to maintaining a healthy and vibrant lawn, it's important to choose the right herbicide that specifically targets weeds without harming your St. Augustine grass. But with so many options available on the market, it can be overwhelming to find the perfect product.
Before purchasing a post emergent herbicide, there are several factors you need to consider. First, you should take into account the type of weeds you are dealing with. Certain herbicides are specifically formulated to target broadleaf weeds, while others are designed to control grassy weeds. It's crucial to choose a product that aligns with the specific weed problem you are facing.
Additionally, you should also evaluate the safety and environmental impact of the herbicide. Look for products that are labeled as safe for St. Augustine grass and are environmentally friendly. It's important to protect not only your lawn but also the surrounding ecosystem.
Are you tired of dealing with stubborn weeds that ruin the appearance of your St. Augustine grass? Are you looking for a solution that will effectively eliminate those unwanted plants without harming your lawn? Look no further! In this article, we will explore the best post emergent herbicides for St. Augustine grass, taking into consideration different factors such as effectiveness, safety, and environmental impact. Discover the top-rated products that have been tested and recommended by lawn care experts. Don't let pesky weeds take over your lawn any longer – read on to find the perfect herbicide for your St. Augustine grass!
10 Best Post Emergent Herbicide For St Augustine Grass
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Ideal for killing weeds in St. Augustine grass while leaving the grass unharmed.
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The product is ideal for controlling post-emergent weeds and providing fertilizer for lawns up to 16,000 sq ft.
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Ideal for killing weeds in lawns and turf grasses, both pre and post-emergent.
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This product is ideal for killing grass weeds after they have emerged.
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This product is ideal for controlling weeds on both commercial and residential lawns, both before and after emergence.
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6
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This product is ideal for preventing weeds and maintaining a healthy lawn in Southern regions.
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7
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Ideal for controlling weeds in St. Augustine grass.
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8
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This product is ideal for killing weeds in lawns and has a herbicide called TRIMEC.
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9
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Ideal for controlling and preventing weed growth in turfgrass, non-crop areas, and crops such as corn, sorghum, and sugarcane.
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10
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The product is ideal for controlling weeds in lawns and in areas with ornamental plants without harming the grass.
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1. Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon
This herbicide is an effective solution to eliminate many broadleaf weeds, making it a top choice for homeowners and gardeners. Its versatile formula is also suitable for use on centipede grass, making it a reliable option for those with a variety of lawns.
In addition to its broadleaf weed-killing abilities, this herbicide provides excellent suppression of crabgrass, a common nuisance in many lawns. It also effectively controls both emerged weeds and those that grow from seed, providing long-lasting results that will leave your lawn looking healthy and lush.
Whether you're dealing with dandelions, clover, or other broadleaf weeds, this herbicide is up to the task. Its powerful formula targets weeds at the root, ensuring that they won't regrow and cause further problems. And with its easy application process, you can quickly and easily treat your lawn without any hassle.
2. Surgepro Weed & Feed: Ultimate Post-Emergent 16-0-9 Solution
Introducing the Professional-Grade Four-Way Herbicide, the ultimate solution for effective weed control. Designed with expertise, this herbicide offers quick and efficient control over a wide range of weeds, ensuring a pristine and weed-free lawn.
With its powerful formula, this herbicide eliminates over 250 different types of weeds, including troublesome ones like dandelions, clover, chickweed, and plantains. Say goodbye to those unsightly weeds that ruin the beauty of your lawn.
What sets this herbicide apart is its superior performance throughout the entire growing season. Even when applied during the cooler temperatures of spring and fall, it delivers exceptional results. You can rely on this herbicide to keep your lawn looking its best all year round.
Not only does this herbicide eliminate weeds, but it also nourishes your lawn, promoting thicker and greener growth. Packed with nutrients, it contains both quick-release nitrogen for immediate green-up and 25% slow-release nitrogen for extended feeding. This ensures your lawn receives the necessary nutrients for sustained health and vitality.
One of the standout features of this herbicide is its smaller particles, which contribute to superior coverage and performance. The finely crafted particles ensure that every inch of your lawn is effectively treated, leaving no room for weeds to thrive. This means you can expect exceptional results with every application.
Whether you are a professional landscaper or a homeowner looking to maintain a beautiful lawn, this Professional-Grade Four-Way Herbicide is the ideal choice. Its impressive ability to control a broad spectrum of weeds, combined with its nourishing properties, makes it a reliable and effective solution.
Invest in this herbicide today and experience the difference it can make to your lawn. Say goodbye to weeds and hello to a lush, vibrant, and weed-free lawn that you can be proud of.
3. Harvest Pro Weed Killer – 32oz Concentrate
Liquid Harvest Mesotrione is a potent herbicide that can effectively prevent crabgrass seed germination and kill various broadleaf weeds such as dandelion and clover on contact. It allows cool season turfgrass to thrive in a weed-free environment. This herbicide contains 40% active ingredient that inhibits photosynthesis in susceptible plant species. Once absorbed by the roots, shoots, and leaves of the plants, it is distributed throughout the plant.
Liquid Harvest Mesotrione targets 46 broadleaf species of weed and grass, including Barnyard grass, Carpetweed, Chickweed, Clover, Crabgrass (large & smooth), Dandelion, Foxtail, Goosegrass, Henbit, Yellow Nutsedge, Purslane, Thistle, Wild Carrot, and more. However, it is not recommended for use on Bentgrass, Poa annua, kikuyugrass, zoysiagrass, seashore paspalum, or bermudagrass. If applied to bermudagrass, it should only be used while the grass is still dormant.
To use Liquid Harvest Mesotrione, mix 4-8 ounces per 30 gallons of water per acre, and use a surfactant to increase effectiveness. It is essential to read the label carefully before use for full instructions.
Unlike typical weed killers, Mesotrione prevents photosynthesis in plants, and it can start working immediately after being absorbed. However, it can take up to 2-3 weeks before full death occurs on weeds. Mesotrione must be activated by water, so if rainfall hasn’t occurred within ten days of application, the area should be watered with 0.15 inches of water.
4. Monterey Lg5328 Getter, Post Emergence Herbicide For Grass Weeds, 8 Oz (Packaging May Vary)
Grass Getter by Monterey is an effective post-emergent herbicide specifically designed to control grass weeds in flowerbeds, vegetable gardens, ground covers, shrubs, and ornamental plants. It is a selective formula that targets unwanted and unsightly weedy grass vegetation while leaving desirable plants unharmed.
This herbicide is capable of killing most annual and hard-to-kill perennial grasses up to one foot tall, including notoriously difficult-to-control species such as crabgrass, Bermuda grass, Johnson grass, quack grass, Canadian thistle, and other broadleaf thistle weeds.
To use Grass Getter, simply mix the concentrated formula with a surfactant oil concentrate and water before applying with a hose end or tank-type feed sprayer. It is important to apply the herbicide when grassy weeds are actively growing and during sunny, warm weather for optimal results.
With Grass Getter, gardeners and homeowners can easily and conveniently control grassy weeds in their lawns and gardens without the risk of injuring or damaging desirable plants. It is an excellent solution for those who want to keep their outdoor spaces looking neat and tidy.
5. Atticus Torocity: Selective Turf Herbicide Concentrate.
Torocity is a highly effective weed control solution that contains 40.0% mesotrione, the same active ingredient found in the leading brand. Mesotrione has been trusted for over 20 years for its ability to effectively control weeds in newly seeded areas and established turf.
One of the standout features of Torocity is its flexible application timing. This double-hitter herbicide allows for both pre- and post-emerge activity, giving users a wider application window to stop new weeds before they start and take down existing ones. This is particularly useful when compared to pre-emergent herbicides, which have a much narrower application window.
Torocity delivers broad-spectrum weed control, effectively taking care of many broadleaf and grassy weeds, including crabgrass, ground ivy (creeping charlie), clover, oxalis, and dandelion. This makes it a highly versatile solution for those looking to tackle multiple weed types at once.
As an ideal turf renovation partner, Torocity is one of the few herbicides approved for use on just-seeded Kentucky bluegrass, tall fescue, perennial ryegrass, and centipedegrass. It can be applied before seed germination to prevent weed competition and encourage new grass growth. Torocity may also be used on new seedings, grass grown for sod, and established turf. However, it should not be applied to certain species, including bentgrass, zoysiagrass, and actively growing Bermudagrass. For a complete list of tolerant turfgrass species, refer to the label.
Torocity also comes with an easy-measure tool to take the guesswork out of the application process. The pre-marked syringe highlights the exact amount of product needed per gallon of water, making it easy to get the right rate. It's important to note that Torocity is activated by water, so if rainfall doesn't occur within 10 days of application, the area should be watered with 0.15 inches of water.
It's important to keep in mind that Torocity is not available for sale in Alaska, Arizona, California, Hawaii, or Wyoming. As with any herbicide, it's important to read and follow label instructions carefully. Not all products are registered for use in every state.
6. Bioadvanced Season Long Lawn Weed Killer + Preventer For Southern Lawns 10 Lb Granules, 4,000 Sq Ft
This product is a powerful weed killer that targets a variety of broadleaf weeds, including Dandelion, Clover, Chickweed, Dollarweed and Henbit, providing effective results for up to 6 months. It also prevents the growth of grassy and broadleaf weeds such as Crabgrass, Annual Bluegrass, Common Dandelion, Goosegrass and Spurge, helping to maintain a healthy lawn for the same duration.
Designed for use on southern lawns, this product can treat up to 4,000 square feet of turf, including all varieties of St. Augustinegrass and Floratam. With just one application, users can rest assured that their lawn will remain free from over 50 different types of listed weeds throughout the entire season.
This product is easy to use and provides a long-lasting solution to pesky weeds. Its effectiveness in controlling and preventing weed growth is unmatched, making it a must-have for homeowners looking to maintain a healthy and beautiful lawn. With its season-long weed control, users can save time and money by avoiding the need for multiple applications.
7. Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide, Light Tan
This weed control product is designed to effectively and efficiently handle weed infestations in St. Augustine and Centipede grasses, making it an ideal solution for lawn maintenance. The package weight is 1.021 kilograms, and the dimensions are 5.842 L x 19.177 H x 12.954 W (centimeters). One quart of the product is capable of treating up to 3,720 sq ft of lawn.
This powerful weed control solution is designed to provide long-lasting results, ensuring that your lawn remains free from any weed infestations. The product is easy to use and can be applied using a variety of methods, including spraying or pouring. It is important to follow the instructions provided carefully to ensure optimal results and avoid any potential damage to your lawn.
With its impressive coverage area and effective weed control properties, this product is an excellent choice for anyone looking to maintain a healthy and beautiful lawn. Its compact and lightweight design makes it easy to store and transport, so you can always have it on hand when you need it. Whether you're a professional landscaper or a homeowner looking to keep your lawn in top condition, this weed control product is an excellent choice.
8. Southern Ag 13503 Lawn Weed Killer With Trimec 32oz Herbicide, Brown
This versatile herbicide is specially formulated to tackle weeds on nine different types of turf. With its patented blend of three powerful weed killers, it effectively controls a wide range of lawn weeds, leaving your lawn looking healthy and vibrant.
Whether you prefer conventional sprayers or hose end sprayers, this product is easy to use with directions provided for both. For best results, it is recommended to use a surfactant for herbicide, which helps to increase the herbicide's performance.
Say goodbye to unsightly weeds and hello to a beautiful, weed-free lawn with this innovative herbicide. Trust in its proven effectiveness and enjoy a lush, healthy lawn all season long.
9. Hi-Yield Atrazine Weed Killer
The Atrazine Herbicide boasts a powerful formula that contains 4.00% of active ingredient Atrazine, making it an effective solution for controlling or suppressing a range of weeds. This herbicide is specially designed to target stubborn weeds such as Annual Bluegrass (Poa annua), Chickweed (Common and Mouseear), Henbit, Moneywort, Pennywort (Dollarweed), Spurge, and Annual. It is ideal for use on St. Augustine and Centipede grass, making it a perfect addition to any lawn care routine.
With Atrazine, users can rest assured that their lawns will remain healthy and free from weeds. It's easy to use, and users can apply it directly to their lawns without the need for additional equipment. This herbicide is specially formulated to provide long-lasting results, ensuring that weeds stay away for extended periods.
The Atrazine Herbicide is an excellent choice for anyone looking for a reliable solution for weed control. It's safe to use and does not harm the environment or surrounding plants. Its powerful formula is designed to ensure that weeds are effectively controlled or suppressed, leaving your lawn looking neat and healthy.
10. Fertilome (10527) Weed Free Zone Rts (32 Oz)
This weed killer is a highly effective solution designed to control over 80 types of broadleaf weeds, including Clover, Spurge, Chickweed, Thistle, and more. The product is safe to use on a variety of grass types, such as Kentucky Bluegrass, Bermudagrass, Bahiagrass, Zoysiagrass, among others. A full list of compatible grasses can be found on the product label.
With its rapid and effective formula, this weed killer provides visible results within hours of application, making it a reliable solution for eliminating unwanted weeds. For the best results, it is recommended to apply the product when broadleaf weeds are young and actively growing. This can be done during spring, summer, or fall.
The ready-to-spray formulation of this weed killer makes it incredibly easy to use. Simply attach the hose and spray for quick and efficient application. Whether you're a professional landscaper or a homeowner looking to maintain a beautiful lawn, this weed killer is a must-have for anyone looking to control broadleaf weeds with ease.
Best Post Emergent Herbicide For St Augustine Grass FAQs
Are there any organic or natural alternatives to chemical post emergent herbicides for controlling weeds in St. Augustine grass?
Yes, there are organic or natural alternatives to chemical post emergent herbicides for controlling weeds in St. Augustine grass. One effective method is manual weed removal, where you physically pull out the weeds by hand or with the help of a tool like a weed puller. This can be time-consuming, but it is a safe and environmentally friendly approach.
Another option is to use organic herbicides that are made from natural ingredients such as vinegar, citrus oil, or essential oils. These products work by burning the weed's foliage and can be effective against certain types of weeds. However, it's important to note that organic herbicides may also harm desirable plants, so caution should be exercised during application.
In addition, maintaining a healthy lawn by proper mowing, watering, and fertilizing practices can help prevent weed growth and competition. Regularly removing weeds before they go to seed can also help prevent their spread.
Overall, while there are organic and natural alternatives available, it's important to carefully consider their effectiveness, potential impact on desirable plants, and the specific weed species you are dealing with. Consulting with a professional in horticulture or lawn care can provide more tailored advice and recommendations for your specific situation.
Are there any post emergent herbicides that can be used specifically for St. Augustine grass without harming other plants or grass types?
Yes, there are post-emergent herbicides that can be used specifically for St. Augustine grass without harming other plants or grass types. One commonly used herbicide for St. Augustine grass is Atrazine. Atrazine is effective in controlling a wide range of broadleaf and grassy weeds, while being safe for St. Augustine grass when used according to the label instructions. It is important to carefully read and follow the instructions and precautions provided by the manufacturer.
Another herbicide option is Sulfentrazone. It is effective against a variety of broadleaf weeds and is safe for St. Augustine grass. Again, it is crucial to follow the specific instructions and precautions mentioned on the product label.
Additionally, it is advisable to spot treat weeds rather than applying herbicides to the entire lawn to minimize the risk of harming other plants or grass types. If you are unsure about the compatibility of a herbicide with St. Augustine grass or other plants in your specific situation, consulting with a professional lawn care service or a local agricultural extension office can provide you with valuable guidance and recommendations.
Are there any specific brands or products that are highly recommended as the best post emergent herbicides for St. Augustine grass?
There are several brands and products that are highly recommended as effective post-emergent herbicides for St. Augustine grass. One popular brand is Ortho Weed B Gon Weed Killer for St. Augustine Grass, which is specifically formulated to target and control common weeds like dandelions, clover, and chickweed without harming St. Augustine grass. Another widely recognized brand is Bayer Advanced Southern Weed Killer for Lawns, which is known for its ability to effectively control a broad range of weeds while being safe for St. Augustine grass.
Other recommended herbicides include Southern Ag Amine 24-D Weed Killer, which is known for its selective control of many broadleaf weeds in St. Augustine grass, and Gordon's Trimec Lawn Weed Killer, which is a trusted product for controlling a wide range of broadleaf weeds in St. Augustine lawns.
It is important to carefully read and follow the instructions on the product label for proper application and timing. Additionally, it is advisable to consult with a local gardening expert or professional to determine the most suitable herbicide for your specific St. Augustine grass and weed problems.
Are there any specific herbicides that are known to be safe for St. Augustine grass while effectively controlling weeds?
Yes, there are specific herbicides that are known to be safe for St. Augustine grass while effectively controlling weeds. One such herbicide is Atrazine. Atrazine is commonly used to control broadleaf and grassy weeds in St. Augustine grass lawns. It is considered safe for St. Augustine grass when used according to the manufacturer's instructions. Another herbicide that can be used is 2,4-D. It is effective against many broadleaf weeds and is also safe for St. Augustine grass when used as directed. It is important to always read and follow the label instructions of any herbicide to ensure proper application and safety. Additionally, it is recommended to consult with a local lawn care professional or extension service for specific herbicide recommendations based on your location and weed problems.
Can post emergent herbicides be used year-round on St. Augustine grass, or are there specific times of the year when they are most effective?
While post-emergent herbicides can be used on St. Augustine grass, it is essential to consider the specific timing for optimal effectiveness. The best time to apply post-emergent herbicides for St. Augustine grass is during the active growing season, which is typically in the spring and summer months. This is when the grass is actively absorbing nutrients and growing, making it more susceptible to herbicide treatments.
Applying post-emergent herbicides during the active growing season allows the chemicals to target and control the weeds effectively without harming the St. Augustine grass. However, it is crucial to read the instructions and labels of the herbicide products carefully, as different formulations may have specific recommendations for application timing.
If you are unsure about the ideal timing for post-emergent herbicide application on your St. Augustine grass, it is best to consult with a local lawn care professional or extension office. They will have the knowledge and expertise to provide specific recommendations based on your region's climate and the specific weed issues you are facing.
How long does it typically take for post emergent herbicides to start showing results on St. Augustine grass?
The time it takes for post emergent herbicides to show results on St. Augustine grass can vary depending on several factors. Generally, you can expect to see visible effects within 1 to 3 weeks after application. However, it is important to note that the effectiveness of the herbicide can also depend on the specific type of weed you are targeting, the stage of weed growth, and the weather conditions.
To ensure the best results, it is recommended to carefully follow the instructions provided by the herbicide manufacturer, including the appropriate application rate and timing. Additionally, proper lawn maintenance practices such as regular mowing, adequate watering, and fertilization can help promote the recovery and health of your St. Augustine grass.
If you have applied a post emergent herbicide to your St. Augustine grass and do not see desired results within the expected timeframe, it is advisable to consult with a professional lawn care expert or contact the herbicide manufacturer for further guidance and recommendations.
What are some potential side effects or risks associated with using post emergent herbicides on St. Augustine grass?
While post-emergent herbicides can effectively control weeds in St. Augustine grass, there are a few potential side effects and risks to consider. Firstly, some herbicides may cause temporary discoloration or yellowing of the grass, which can be concerning for homeowners. However, this is usually a temporary issue and the grass will recover with time.
Another risk is the potential for herbicide drift, where the product may inadvertently affect nearby plants or sensitive areas. It is crucial to follow the label instructions carefully and apply the herbicide on calm days to minimize drift.
Additionally, some herbicides may have environmental implications if they leach into soil or water bodies. It is important to choose herbicides that are specifically formulated for St. Augustine grass and follow recommended application rates to minimize any potential environmental impact.
To mitigate these risks, it is advisable to read and follow the instructions on the herbicide label, consider using alternative weed control methods like manual removal or spot treatments, and consult with a professional if you have any concerns or questions about using herbicides on St. Augustine grass.
What are the key factors to consider when selecting the best post emergent herbicide for St. Augustine grass?
When selecting the best post-emergent herbicide for St. Augustine grass, there are several key factors to consider.
Firstly, it is important to identify the specific weeds that you are targeting. Different herbicides are effective against different types of weeds, so it is crucial to choose one that targets the specific weed species present in your St. Augustine grass lawn.
Secondly, consider the safety of the herbicide for St. Augustine grass. Some herbicides may cause harm or discoloration to the grass if not used correctly. Look for herbicides that are labeled as safe for St. Augustine grass or have specific instructions for application on this type of grass.
Another important factor is the effectiveness of the herbicide. Consider the reviews and feedback from other users to determine if the product has a proven track record of effectively eliminating the targeted weeds.
Additionally, assess the ease of use and application of the herbicide. Choose a product that comes with clear instructions and is easy to apply without causing any harm to yourself or the surrounding environment.
Lastly, consider the cost of the herbicide. While it is essential to find an effective product, it is also important to choose one that fits within your budget.
Overall, considering these key factors will help you select the best post-emergent herbicide for St. Augustine grass, ensuring effective weed control while maintaining the health and appearance of your lawn.
What are the most common types of weeds that affect St. Augustine grass, and which herbicide is most effective in controlling them?
There are several types of weeds that commonly affect St. Augustine grass. Some of the most common ones include crabgrass, dollarweed, clover, dandelion, and nutsedge. These weeds can quickly overtake a St. Augustine lawn if not properly controlled.
When it comes to choosing an herbicide for controlling weeds in St. Augustine grass, it is important to consider the specific weeds you are dealing with. Selective herbicides that are labeled safe for use on St. Augustine grass are typically the most effective.
For broadleaf weeds like clover and dandelion, herbicides containing 2,4-D, dicamba, or MCPP can be effective. Make sure to follow the instructions on the herbicide label and avoid spraying on windy days to prevent drift onto desirable plants.
For grassy weeds like crabgrass, a pre-emergent herbicide containing active ingredients like prodiamine or dithiopyr can be used to prevent weed seeds from germinating. Post-emergent herbicides containing quinclorac or fenoxaprop-p-ethyl can be effective in controlling crabgrass that has already emerged.
It is always recommended to consult with a professional or a local extension office to identify specific weeds and determine the most appropriate herbicide and application method for your particular situation.
What is the recommended application rate and frequency for using post emergent herbicides on St. Augustine grass?
The recommended application rate and frequency for using post emergent herbicides on St. Augustine grass can vary depending on the specific herbicide being used and the severity of the weed infestation. However, as a general guideline, it is recommended to apply post emergent herbicides for St. Augustine grass at a rate of 1 to 1.5 fluid ounces per 1,000 square feet.
In terms of frequency, it is typically recommended to apply post emergent herbicides on St. Augustine grass every 6 to 8 weeks, or as needed based on the weed growth. It is important to follow the label instructions of the specific herbicide being used, as they will provide detailed information on the application rate and frequency for optimal results.
Additionally, it is important to consider factors such as weather conditions, temperature, and the health of the grass when determining the application rate and frequency. Consulting with a professional or contacting your local cooperative extension office can provide more specific recommendations tailored to your region and specific needs.