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Top 5 Best Weed Killer For St Augustine Grass 2024

by Jack

Fact-Checked by Pixelfy Team

After looking at all the info, it’s clear the **Roundup 5008410 Lawns 5 Concentrate, 32oz** is made just right for southern lawns. It really does a great job killing weeds without hurting your St. Augustine grass, as long as you use it correctly.

St. Augustine grass is a warm-season grass that is known for its dense growth and tolerance to shade. However, like any other grass type, it is susceptible to weed infestations that can hinder its growth and appearance. Weeds can also be challenging to control, especially if they have already taken root. This is where a weed killer comes in handy.

The best weed killer for St. Augustine grass should effectively eliminate weeds without harming the grass. It should also be safe for the environment and easy to use. When looking for a weed killer, it’s essential to consider the type of weeds you’re dealing with and the stage of their growth. Some weed killers are effective against young weeds, while others work best on mature ones.

Additionally, it’s important to consider the toxicity of the weed killer and its impact on the environment. Some weed killers contain harmful chemicals that can leach into the soil and waterways, causing harm to plants and animals. It’s crucial to choose a weed killer that is safe for the environment and won’t harm other beneficial plants in your garden.

In this article, we will review the best weed killers for St. Augustine grass, taking into account their effectiveness, safety, and ease of use. We will also provide tips on how to choose the right weed killer and use it properly to achieve the best results.

Best Weed Killer for St Augustine Grass

When it comes to maintaining a lush and healthy lawn, one of the biggest challenges faced by homeowners is dealing with weeds. Weeds can quickly take over a lawn, choking out the grass and leaving unsightly patches of dead or dying vegetation. For those with St Augustine grass, finding the right weed killer can be particularly challenging, as this type of grass requires special care and attention. In this article, we’ll take a look at some of the best weed killers for St Augustine grass, so you can keep your lawn looking its best all year round.

Hi-Yield Atrazine Weed Killer

Hi-Yield Atrazine Weed Killer

If you are looking for a weed killer that can handle tough weeds in St. Augustine and Centipedegrass, Hi-Yield Atrazine Weed Killer could be the solution for you.

Pros

  • Atrazine – 4.00% active ingredient
  • Controls both emerged weeds and weeds from seed
  • Effective against Henbit, Dollarweed, Chickweed, Clover, Sandspur, and others listed on the label

Cons

  • Can cause yellowing of grass if not used correctly
  • Requires careful measuring and application
  • Not safe for use on other types of grass

This product is a great choice for those looking to control weeds in St. Augustine and Centipedegrass. The 4.00% Atrazine active ingredient works to control both emerged weeds and weeds from seed, making it a powerful solution for even the toughest weeds.

One of the biggest advantages of Hi-Yield Atrazine Weed Killer is that it is effective against a wide range of weeds, including Henbit, Dollarweed, Chickweed, Clover, Sandspur, and others listed on the label. However, it is important to note that the product can cause yellowing of grass if not used correctly.

To get the best results, it is important to carefully measure and apply the product according to the instructions. Additionally, it is not safe for use on other types of grass, so it is important to ensure that you are using it only on St. Augustine and Centipedegrass.

Overall, Hi-Yield Atrazine Weed Killer is a great choice for those looking to control tough weeds in St. Augustine and Centipedegrass. If used correctly, it can be an effective solution for even the most stubborn weeds.

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

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

This weed killer is a great choice for those looking to get rid of broadleaf weeds and crabgrass in their St. Augustine or centipede grass lawn. It provides excellent control of emerged weeds and weeds from seed.

Pros

  • Kills many broadleaf weeds
  • Provides suppression of crabgrass
  • Also used in centipede grass

Cons

  • Not recommended for use with hose-end sprayers
  • Spray to accurately obtain indicated coverage without overlap
  • Slow acting

This weed killer is a great choice for those looking to get rid of broadleaf weeds and crabgrass in their St. Augustine or centipede grass lawn. The Southern Ag Atrazine St. Augustine Grass Weed Killer is easy to apply and can be used to control many common grassy and broadleaf weeds. It is also great for suppressing crabgrass, which can be a major problem in many lawns.

One of the best things about this weed killer is that it is also safe to use on centipede grass. This means that you can use it on multiple types of grass, making it a versatile option for those with different types of lawns.

However, this weed killer is not recommended for use with hose-end sprayers. You will need to spray it accurately to obtain the indicated coverage without overlap. Additionally, it can be slow-acting, so you may need to be patient to see results.

Overall, the Southern Ag Atrazine St. Augustine Grass Weed Killer is a great option for those looking to get rid of weeds in their lawn. It is easy to apply and provides excellent control of many common weeds.

Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide, Light Tan

Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide, Light Tan

If you’re looking for a weed killer for St. Augustine grass, Southern Ag 006130 Atrazine St. Augustine Weed Killer is a great option to consider. It is effective in controlling many common grassy and broadleaf weeds, including crabgrass, and it provides suppression of emerged weeds and weeds from seed.

Pros

  • One quart treats 3,720 sq ft
  • Controls weeds in St. Augustine and Centipede grasses
  • Provides suppression of emerged weeds and weeds from seed

Cons

  • Not recommended for use with hose-end sprayers
  • May not be effective on all types of weeds
  • It is important to spray accurately to obtain indicated coverage without overlap

With Southern Ag 006130 Atrazine St. Augustine Weed Killer, you can expect excellent results when used on St. Augustine and Centipede lawn grasses. It is easy to apply, and one quart can treat up to 3,720 sq ft.

One of the best features of this weed killer is that it provides suppression of emerged weeds and weeds from seed, which means you can use it as a preventative measure to keep weeds from sprouting in the first place.

However, it is important to note that this product is not recommended for use with hose-end sprayers. Additionally, while it is effective on many types of grassy and broadleaf weeds, it may not be effective on all types.

Overall, if you’re looking for a reliable weed killer for St. Augustine grass, Southern Ag 006130 Atrazine St. Augustine Weed Killer is definitely worth considering. Just be sure to follow the instructions carefully and spray accurately to achieve the best results.

Roundup 5008410 Lawns 5 Concentrate, 32oz

Roundup weed killer

If you’re looking for a weed killer that won’t harm your St. Augustine grass, Roundup 5008410 Lawns 5 Concentrate may be just what you need. With a rating of 4.3 out of 5 stars and over 1,000 reviews, this weed killer has proven to be effective for many homeowners.

Pros

  • Kills weeds, not the lawn (when used as directed)
  • Kills 93 types of weeds, including dollarweed, dandelion, clover, and yellow nutsedge (see inside booklet for weed list)
  • Starts working immediately, and is rainproof in 4 hours

Cons

  • Only available in certain states
  • May require multiple applications for tough weeds
  • Some users report that it can take a few weeks to see results

Roundup 5008410 Lawns 5 Concentrate is easy to mix and treats up to 6,000 square feet, making it a great option for larger lawns. It’s also safe to use on Southern grasses, including St. Augustine, Bermudagrass, Centipedegrass, and Bahiagrass.

If you’re dealing with tough weeds like dollarweed or yellow nutsedge, Roundup 5008410 Lawns 5 Concentrate may require multiple applications to fully eradicate them. However, many users report that it starts working immediately, so you should see results fairly quickly.

Overall, if you’re looking for a weed killer that’s safe for your St. Augustine grass and effective against a wide range of weeds, Roundup 5008410 Lawns 5 Concentrate is worth considering. Just be sure to follow the instructions carefully and use it as directed.

Scotts Turf Builder Bonus S Southern Weed & Feed2

Scotts Turf Builder Bonus S Southern Weed & Feed2

If you’re looking for a weed killer and lawn fertilizer for St. Augustinegrass, Centipedegrass, Zoysiagrass, and Carpetgrass, Scotts Turf Builder Bonus S Southern Weed & Feed2 is a great option.

Pros

  • Kills existing weeds as listed and feeds grass to crowd out future weeds.
  • Controls various types of weeds, including dollarweed, clover, dandelion, chickweed, oxalis, henbit, and purslane.
  • Helps build strong, deep roots to withstand Southern stressors.

Cons

  • Must be applied to a dry lawn when grass and weeds are actively growing and watered in immediately after application.
  • Some users have reported unclear instructions on the bag.
  • May require more watering than usual.

This lawn care product is a great choice for those who want to keep their lawn healthy and weed-free. It works by killing existing weeds and feeding the grass to prevent future weed growth. The product is specifically designed for St. Augustinegrass, Centipedegrass, Zoysiagrass, and Carpetgrass, so you can be sure it will work effectively on your lawn.

One of the best things about Scotts Turf Builder Bonus S Southern Weed & Feed2 is its ability to control a wide variety of weeds. It can effectively control dollarweed, clover, dandelion, chickweed, oxalis, henbit, purslane, and more, making it a versatile product that can handle most weed problems.

In addition to weed control, this product also helps build strong, deep roots that can withstand Southern stressors. This means that your lawn will be healthier and more resilient, even during periods of extreme weather.

While this product is effective, it does require some care when applying. It must be applied to a dry lawn when grass and weeds are actively growing, and it must be watered in immediately after application. Some users have reported unclear instructions on the bag, so it’s important to read the label carefully before use.

Overall, Scotts Turf Builder Bonus S Southern Weed & Feed2 is a great choice for anyone looking for a weed killer and lawn fertilizer for St. Augustinegrass, Centipedegrass, Zoysiagrass, and Carpetgrass. Just be prepared to water your lawn more than usual after application.

Buying Guide

When looking for the best weed killer for St. Augustine grass, it is important to consider a few key factors. Here are some features to look for when choosing a product:

Type of Weed Killer

There are two main types of weed killers: selective and non-selective. Selective weed killers are designed to target specific types of weeds without harming the surrounding grass. Non-selective weed killers, on the other hand, will kill any plant it comes into contact with. For St. Augustine grass, it is important to choose a selective weed killer that is safe for this type of grass.

Active Ingredients

Different weed killers use different active ingredients to kill weeds. Some common active ingredients include glyphosate, 2,4-D, and dicamba. It is important to research these ingredients and determine which ones are most effective for the types of weeds you are trying to eliminate.

Application Method

Weed killers come in a variety of application methods, including sprays, granules, and concentrates. Sprays are easy to apply and are ideal for targeting specific weeds. Granules are best for larger areas and can be spread using a spreader. Concentrates are mixed with water and applied using a sprayer. Choose the application method that is most convenient for your needs.

Safety Precautions

When using any type of weed killer, it is important to take safety precautions. Always read the label carefully and follow the instructions for use. Wear protective clothing and avoid using the product on windy days to prevent drift. Keep children and pets away from the treated area until the product has dried.

By considering these factors, you can choose the best weed killer for St. Augustine grass that will effectively eliminate weeds without harming your lawn.

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