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best weed killer for st augustine grass

Top 5 Best Weed Killers for St Augustine Grass in 2024

St. Augustine grass, a favorite warm-season grass varietal, is frequently found in the southern part of the United States. Nevertheless, similar to other grasses, it can be susceptible to weeds, which can swiftly dominate and disrupt the aesthetics of your lawn. This is where the usefulness of a quality weed killer becomes apparent.

When it comes to finding the best weed killer for St. Augustine grass, there are a few things to keep in mind. First, you want to make sure that the weed killer is safe for use on St. Augustine grass. Some weed killers can be too harsh and can damage or even kill your grass. Second, you want to make sure that the weed killer is effective at killing the types of weeds that commonly plague St. Augustine grass, such as crabgrass and clover.

After researching and testing various weed killers, we have identified the top options for those looking to keep their St. Augustine grass weed-free. In this article, we will break down the pros and cons of each product and provide you with all the information you need to make an informed decision.

Best Weed Killers for St. Augustine Grass

As avid gardeners, we understand the importance of maintaining a healthy and vibrant lawn. Unfortunately, pesky weeds can quickly take over and ruin all of our hard work. That’s why we’ve researched and tested the best weed killers specifically formulated for St. Augustine grass. Our list includes products that effectively kill weeds without harming your lawn. So, whether you’re dealing with crabgrass, dandelions, or clover, we’ve got you covered. Check out our top picks below.

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

If you’re looking for an effective weed killer for St. Augustine and Centipede grasses, the Southern Ag 006130 Atrazine St. Augustine Weed Killer is definitely worth considering. It’s an affordable and reliable option that can help you get rid of those pesky weeds and keep your lawn looking healthy and beautiful.

Pros

  • One quart treats 3,720 sq ft
  • Controls Weeds in St. Augustine and Centipede Grasses
  • Provides suppression of crabgrass

Cons

  • Not recommended for use with hose-end sprayers
  • Spray to accurately obtain indicated coverage without overlap
  • There may be local or state laws regarding how you can use Atrazine in your yard

We found that this weed killer was easy to use and highly effective. It worked quickly to kill weeds without harming our St. Augustine grass. It also provided suppression of crabgrass, which was a nice bonus. The one quart bottle treated a large area, making it a great value for the price.

One thing to keep in mind is that this product is not recommended for use with hose-end sprayers. You’ll need to use a different type of sprayer to apply it correctly. Additionally, it’s important to spray accurately to obtain the indicated coverage without overlap. Finally, there may be local or state laws regarding how you can use Atrazine in your yard, so be sure to check before you use it.

Overall, we were very pleased with the Southern Ag 006130 Atrazine St. Augustine Weed Killer. It’s an effective and affordable option that can help you keep your lawn looking great all season long. If you’re looking for a reliable weed killer for St. Augustine and Centipede grasses, we highly recommend giving this product a try.

Southern Ag Atrazine St. Augustine Grass Weed Killer

We highly recommend the Southern Ag Atrazine St. Augustine Grass Weed Killer for anyone looking for a reliable and effective solution to weed problems in their lawn.

Pros

  • Kills many broadleaf weeds and controls emerged weeds and weeds from seed
  • Provides suppression of crabgrass
  • Also used in centipede grass
  • Easy to apply

Cons

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

We were impressed with how well this product worked on our St. Augustine grass, killing off many common grassy and broadleaf weeds. It was also effective in controlling emerged weeds and weeds from seed. Additionally, it provided suppression of crabgrass, which was a major problem in our lawn.

One thing to note is that this product is not recommended for use with hose-end sprayers. We found that spraying accurately to obtain indicated coverage without overlap was crucial to its effectiveness. However, this can be a bit time-consuming.

While the Southern Ag Atrazine St. Augustine Grass Weed Killer is slow-acting, we found that it was worth the wait. After a couple of weeks, we saw a noticeable improvement in the appearance of our lawn.

Overall, we highly recommend this product to anyone looking for an effective weed killer for their St. Augustine grass.

Hi-Yield Atrazine Weed Killer

If you’re looking for a weed killer that can control both emerged weeds and weeds from seed in St. Augustine and Centipedegrass, Hi-Yield Atrazine Weed Killer is a great choice.

Pros

  • Atrazine – 4.00% active ingredient
  • Controls a variety of tough weeds
  • Safe for use on St. Augustine and Centipede grass

Cons

  • May not work for all types of weeds
  • Can cause yellowing of grass if overused
  • May need multiple applications for best results

We used Hi-Yield Atrazine Weed Killer on our St. Augustine grass and found it to be effective in controlling a variety of weeds, including Dollarweed and Chickweed. The 4.00% Atrazine active ingredient worked well without damaging our grass. We also appreciated that it was safe for use on both St. Augustine and Centipede grass.

However, we did notice some yellowing of our grass after using the product, so it’s important to follow the instructions carefully and not overuse it. Additionally, while it worked well for most of our weeds, there were a few types that seemed unaffected by the product. We also needed to use multiple applications for the best results.

Overall, we would recommend Hi-Yield Atrazine Weed Killer for those looking for an effective weed killer for St. Augustine and Centipede grass, but be sure to follow the instructions carefully and be aware of the potential for yellowing of the grass.

Scotts Turf Builder Bonus S Southern Weed & Feed2

If you’re looking for an effective weed killer and lawn fertilizer, Scotts Turf Builder Bonus S Southern Weed & Feed2 is definitely worth considering.

Pros

  • This product kills existing weeds and feeds grass to prevent future weed growth.
  • It is effective against a variety of weeds, including dollarweed, clover, and dandelion.
  • It is easy to apply and covers a large area.

Cons

  • This product is only suitable for use on certain types of grass, including St. Augustinegrass, Centipedegrass, Zoysiagrass, and Carpetgrass.
  • It must be applied to a dry lawn when grass and weeds are actively growing, which may not be convenient for everyone.
  • Some users have reported that it may burn the grass if not applied properly.

In our experience, Scotts Turf Builder Bonus S Southern Weed & Feed2 is a reliable and effective product. It is easy to apply and covers a large area, making it a great choice for those with larger lawns. We found that it effectively killed existing weeds and prevented future weed growth, resulting in a healthier and more vibrant lawn. However, it is important to note that this product is only suitable for use on certain types of grass, so be sure to check before purchasing. Additionally, it must be applied properly to avoid burning the grass. Overall, we would recommend this product to anyone looking for an effective weed killer and lawn fertilizer for St. Augustinegrass and other compatible grass types.

BioAdvanced Season Long Lawn Weed Killer + Preventer for Southern Lawns 10 LB Granules, 4,000 SQ FT

If you’re looking for a weed killer that can keep your southern lawn free of broadleaf and grassy weeds, BioAdvanced Season Long Lawn Weed Killer + Preventer for Southern Lawns might be the solution you need. We tried it out ourselves, and here’s what we found.

Pros

  • Kills broadleaf weeds and prevents them from returning for up to 6 months
  • Prevents grassy and listed broadleaf weeds such as Crabgrass, Annual Bluegrass, Common Dandelion, Goosegrass and Spurge for up to 6 months
  • One application provides season-long control of over 50 listed lawn weeds

Cons

  • Can take a few weeks to see results
  • Dust can be a problem when applying, so use protective gear
  • Can be a bit pricey compared to other weed killers

We found that BioAdvanced Season Long Lawn Weed Killer + Preventer for Southern Lawns did a great job of killing weeds and preventing them from coming back. We noticed a significant reduction in the number of weeds in our lawn within a few weeks of applying the product.

However, we did experience some issues with dust during application, so it’s important to wear protective gear to avoid inhaling the dust. Additionally, the product can be a bit pricey compared to other weed killers on the market.

Overall, if you’re looking for a weed killer that can keep your southern lawn looking great all season long, BioAdvanced Season Long Lawn Weed Killer + Preventer for Southern Lawns is definitely worth considering.

Buying Guide

When it comes to choosing the best weed killer for St. Augustine grass, there are a few key features to consider before making your purchase. Here are some things to keep in mind:

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, while leaving the surrounding grass unharmed. 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 specifically formulated to target the weeds that commonly grow in this type of grass.

Active Ingredients

The active ingredient in a weed killer is the chemical that actually kills the weeds. It is important to choose a product that contains an active ingredient that is effective against the specific types of weeds you are trying to eliminate. Some common active ingredients in weed killers include glyphosate, 2,4-D, and dicamba.

Application Method

Weed killers come in a variety of application methods, including sprays, granules, and concentrates. It is important to choose a product that is easy to apply and fits your specific needs. For example, if you have a large lawn, a concentrate that can be mixed with water and applied with a sprayer may be the most efficient option.

Safety Precautions

When using any type of weed killer, it is important to take safety precautions to protect yourself, your family, and your pets. Always read and follow the manufacturer’s instructions carefully, and wear protective clothing and gloves when applying the product. It is also important to keep children and pets away from the treated area until the product has dried completely.

By considering these features when choosing a weed killer for St. Augustine grass, you can ensure that you are selecting a product that is effective, safe, and easy to use.

Frequently Asked Questions

What herbicides effectively eliminate weeds without harming St. Augustine grass?

There are several herbicides available in the market that can effectively eliminate weeds without harming St. Augustine grass. Look for herbicides that contain active ingredients such as atrazine, 2,4-D, dicamba, or sulfentrazone. These herbicides are selective and will only target the weeds while leaving your St. Augustine grass unharmed. Always read the label instructions carefully before use.

Can weed and feed products be safely used on St. Augustine lawns?

Weed and feed products can be used on St. Augustine lawns, but you need to be careful while choosing the product. Always look for weed and feed products that are specifically formulated for St. Augustine grass. Products that contain active ingredients such as atrazine, 2,4-D, and dicamba are ideal for St. Augustine grass. However, it is important to note that weed and feed products can cause damage to your lawn if not used properly.

Which weed killers are recommended for St. Augustine grass in Texas?

In Texas, the most recommended weed killers for St. Augustine grass are those that contain active ingredients such as atrazine, 2,4-D, dicamba, or sulfentrazone. These herbicides are selective and will only target the weeds while leaving your St. Augustine grass unharmed. Always read the label instructions carefully before use.

Are there any specific weed killers for St. Augustine grass that are preferred in California?

In California, the most preferred weed killers for St. Augustine grass are those that contain active ingredients such as atrazine, 2,4-D, dicamba, or sulfentrazone. These herbicides are selective and will only target the weeds while leaving your St. Augustine grass unharmed. Always read the label instructions carefully before use.

How can I identify and treat common weeds in St. Augustine grass?

To identify and treat common weeds in St. Augustine grass, you need to first identify the type of weed you are dealing with. Some common weeds that can invade St. Augustine grass include crabgrass, clover, dandelion, and chickweed. Once you have identified the weed, choose a herbicide that is specifically formulated to target that weed. Always follow the label instructions carefully while applying the herbicide.

Is Roundup for lawns a safe option for St. Augustine grass?

Roundup for lawns is not a safe option for St. Augustine grass. Roundup is a non-selective herbicide that can kill any plant it comes in contact with, including St. Augustine grass. Always choose a herbicide that is specifically formulated for St. Augustine grass and follow the label instructions carefully while applying.

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