Keeping your lawn neat and free from weeds is a vital aspect of lawn maintenance, and it’s critical to choose an appropriate weed killer for your St. Augustine grass. This type of grass, prevalent in southern regions of the United States due to its thick, luxuriant growth and heat resistance, unfortunately, also tend to lure weeds. If these weeds are not dealt with promptly, they can rapidly overwhelm a St. Augustine lawn. Hence, choosing the most effective weed killer is essential to keep your lawn in tip-top condition.
When choosing a weed killer for St. Augustine grass, it’s important to consider the type of weeds you are dealing with. Some weed killers are designed to target specific types of weeds, while others are more broad-spectrum and will kill a variety of weeds. You’ll also want to consider the toxicity of the weed killer and any potential harm it may cause to your lawn or the environment.
We spent hours researching and testing various weed killers to identify the best options for St. Augustine grass. Our top picks are effective at killing weeds without harming your lawn. We also considered factors such as ease of use, coverage area, and price to help you make an informed decision when choosing the best weed killer for your St. Augustine grass.
Best Weed Killers for St Augustine Grass
We know how frustrating it can be to deal with weeds in your St Augustine grass lawn. That’s why we’ve put together a list of the best weed killers specifically formulated for St Augustine grass. Our team of experts has tested and researched these products to ensure that they are effective and safe for your lawn. Below are our top picks for the best weed killers for St Augustine grass.
1. Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon
If you’re looking for a reliable weed killer for your St. Augustine or centipede lawn, Southern Ag Atrazine St. Augustine Grass Weed Killer is a great option to consider.
Pros
- Kills many broadleaf weeds
- Also used in centipede grass
- Provides suppression of crabgrass
Cons
- Spray to accurately obtain indicated coverage without overlap
- Not recommended for use with hose-end sprayers
- Best results are obtained by application in early spring
We have used this product for several years now and have found it to be very effective in controlling common grassy and broadleaf weeds. The product contains 4% Atrazine, which provides excellent control of emerged weeds and weeds from seed. We have also found that it provides suppression of crabgrass, which is a common problem in many lawns.
One of the best things about Southern Ag Atrazine St. Augustine Grass Weed Killer is that it is also safe to use on centipede grass. This makes it a versatile option for those who have different types of grass in their lawn.
While this product is very effective, it is important to use it correctly. The product should be sprayed accurately to obtain the indicated coverage without overlap. It is also not recommended for use with hose-end sprayers. For best results, the product should be applied in early spring.
Overall, we highly recommend Southern Ag Atrazine St. Augustine Grass Weed Killer for those who are looking for a reliable and effective weed killer for their St. Augustine or centipede lawn.
2. Spectracide Weed Stop For Lawns For St. Augustine & Centipede Lawns Concentrate
If you’re looking for an effective weed killer for your St. Augustine grass, Spectracide Weed Stop For Lawns is a great choice. It is easy to use and controls both emerged weeds and weeds from seeds without harming your lawn when used as directed.
Pros
- It is effective in controlling a wide range of tough weeds, including dollarweed, sandspur, and Florida betony.
- The QuickFlipTM hose-end sprayer is easy to use and activates the spray at the flip of a switch.
- The product is designed for lawn weed control in all St. Augustinegrass varieties and centipedegrass.
Cons
- It may take a while to see the results in summer.
- It may make your grass area dry.
- It may not be effective in killing all types of weeds.
We used Spectracide Weed Stop For Lawns on our St. Augustine grass and found it to be effective in controlling a wide range of tough weeds, including dollarweed, sandspur, and Florida betony. The QuickFlipTM hose-end sprayer made it easy to use and activate the spray at the flip of a switch. We also liked that the product is designed for lawn weed control in all St. Augustinegrass varieties and centipedegrass. However, we did notice that it may take a while to see the results in summer and may make your grass area dry. Additionally, it may not be effective in killing all types of weeds.
In conclusion, if you’re looking for an effective weed killer for your St. Augustine grass, Spectracide Weed Stop For Lawns is a great choice. However, make sure to follow the directions carefully and be patient with the results.
3. Ortho WeedClear Weed Killer for Lawns Ready-To-Spray
If you’re looking for a weed killer that won’t harm your lawn, Ortho WeedClear is a great option.
Pros
- Kills over 250 common weeds, including dandelions, clover, poison ivy, chickweed, and dollarweed.
- Contains three proven ingredients that target common lawn weeds, so it won’t harm your grass when used as directed.
- Visible results in hours; rainproof in 1 hour upon drying; people and pets may enter the treated area after the spray has dried.
Cons
- Some users have reported that it takes multiple treatments to work.
- Weeds may come back in weeks.
- The product may not work as well on stubborn weeds like pennywort.
We recently tried Ortho WeedClear on our lawn and were pleased with the results. The product was easy to use – simply connect your garden hose to the sprayer and set the nozzle to your desired setting. We noticed visible results in just a few hours, and the product was rainproof in 1 hour upon drying.
While some users have reported that it takes multiple treatments to work, we found that one application was enough to kill most of the weeds in our lawn. However, we did notice that some weeds, like pennywort, were more stubborn and required multiple applications.
Overall, we would recommend Ortho WeedClear to anyone looking for a lawn-friendly weed killer that won’t harm your grass. It’s easy to use, effective, and won’t break the bank.
4. Southern Ag 006130 Atrazine St. Augustine Weed Killer
We highly recommend Southern Ag 006130 Atrazine St. Augustine Weed Killer for those looking for an effective solution to control weeds in St. Augustine and Centipede grasses.
Pros
- One quart treats 3,720 sq ft
- Controls Weeds in St. Augustine and Centipede Grasses
- Easy to use spray bottle
Cons
- May take a few weeks to see results
- Some people may be concerned about using herbicides
- Not safe for all types of grasses
We have used Southern Ag 006130 Atrazine St. Augustine Weed Killer in our own lawn and have been impressed with the results. The easy to use spray bottle makes it simple to apply, and one quart treats a large area of 3,720 sq ft. We have noticed a significant reduction in weeds after using this product.
While it may take a few weeks to see results, we have found that it is worth the wait. It effectively controls weeds in St. Augustine and Centipede grasses without harming the grass itself. However, it is important to note that this product is not safe for all types of grasses, so be sure to check before using.
Overall, we highly recommend Southern Ag 006130 Atrazine St. Augustine Weed Killer for those looking for an effective and easy to use solution to control weeds in St. Augustine and Centipede grasses.
5. Ferti-lome St. Augustine Weed & Feed 15-0-4
If you’re looking for a weed and feed product for your St. Augustine lawn, Ferti-lome St. Augustine Weed & Feed 15-0-4 is a good option to consider.
Pros
- This product provides a 15-0-4 fertilizer mix that is designed for Centipede, Zoysia and St. Augustine lawns and grass types. It helps to improve lawn health and weed defense throughout the season.
- Ferti-lome St. Augustine Weed & Feed 15-0-4 is a pre-emergent and post-emergent herbicide that controls weeds effectively.
- The product covers 5,000 square feet, which is a good amount of coverage for most homeowners.
Cons
- This product is not suitable for Bermuda grasses or any other type of Northern grass.
- The application instructions vary by footage, so you need to read the label carefully before applying the product.
- Some customers have reported that the product didn’t get rid of all their weeds, especially dollar weeds.
We used Ferti-lome St. Augustine Weed & Feed 15-0-4 on our St. Augustine lawn and found that it worked well to control weeds and improve the overall health of our lawn. We liked that it provided both pre-emergent and post-emergent weed control, which meant that we didn’t have to worry about weeds popping up throughout the season.
The fertilizer mix helped to green up our lawn and make it look healthier, and we noticed a significant reduction in the number of weeds in our lawn after using this product. We also appreciated that it was easy to apply and covered a good amount of square footage.
However, we did have to be careful not to use this product on Bermuda grasses or any other type of Northern grass, as it is not suitable for those types of grasses. We also had to read the label carefully to ensure that we were applying the product correctly based on the size of our lawn.
Overall, we would recommend Ferti-lome St. Augustine Weed & Feed 15-0-4 to anyone looking for a weed and feed product for their St. Augustine lawn. It’s effective, easy to use, and provides good coverage.
6. Hi-Yield Atrazine Weed Killer
We recommend purchasing Hi-Yield Atrazine Weed Killer for controlling tough weeds in St. Augustine and Centipedegrass.
Pros
- Atrazine – 4.00%
- Controls both emerged weeds and weeds from seed
- Controls Henbit, Dollarweed, Chickweed, Clover, Sandspur and others listed on label
Cons
- The product is hard to measure out
- Takes 7 to 10 days to see results
- Does not work for some users
We have used Hi-Yield Atrazine Weed Killer and found it to be effective at controlling weeds in our lawn. The product contains atrazine, which is a powerful herbicide that targets a wide range of weed species. It can control both emerged weeds and weeds from seed, making it a versatile solution for weed control.
One of the best things about Hi-Yield Atrazine Weed Killer is that it can control tough weeds like Henbit, Dollarweed, Chickweed, Clover, Sandspur, and others listed on the label. It is also safe to use on St. Augustine and Centipedegrass, which are common grass types in many lawns.
However, the product is hard to measure out, and it takes 7 to 10 days to see results. Some users have reported that the product does not work for them. Overall, we recommend Hi-Yield Atrazine Weed Killer for those looking for an effective weed control solution for St. Augustine and Centipedegrass.
Buying Guide
When choosing the best weed killer for St. Augustine grass, there are a few key features to consider. Here are some factors to keep in mind:
Type of Weed Killer
There are several types of weed killers available, including pre-emergent and post-emergent varieties. Pre-emergent weed killers prevent weed seeds from germinating, while post-emergent weed killers target weeds that have already sprouted. It’s important to choose the right type of weed killer for your needs.
Active Ingredients
Different weed killers contain different active ingredients, each of which targets specific types of weeds. Some ingredients are more effective against broadleaf weeds, while others are better suited for grassy weeds. Be sure to choose a product that targets the types of weeds you’re dealing with.
Safety
It’s important to choose a weed killer that is safe for use around children, pets, and other wildlife. Look for products that are labeled as safe for use on St. Augustine grass, and follow all safety precautions when applying the product.
Application Method
Weed killers can be applied in a variety of ways, including sprays, granules, and concentrates. Consider which application method is most convenient for you, and choose a product that is easy to apply.
Coverage Area
Be sure to choose a weed killer that will cover the area you need to treat. Some products are designed for small lawns, while others are better suited for larger properties.
By considering these factors, you can choose the best weed killer for your St. Augustine grass, ensuring a healthy and beautiful lawn.
Frequently Asked Questions
What is the best weed and feed for St Augustine grass?
We recommend using Scotts Turf Builder Weed and Feed. It is specially formulated for St Augustine grass and helps to control weeds while feeding your lawn.
What are the types of weeds in St Augustine grass?
There are several types of weeds that commonly grow in St Augustine grass, including crabgrass, dandelions, clover, and nutsedge.
What is the best summer weed killer for St Augustine grass?
We recommend using Southern Ag Amine 24-D Weed Killer. It is safe to use on St Augustine grass and is effective against a wide variety of weeds.
What is the best granular weed killer for St Augustine grass?
We recommend using Hi-Yield Atrazine Weed Killer. It is a selective herbicide that targets weeds while leaving your St Augustine grass unharmed.
How do I get rid of weeds without killing St Augustine grass?
One effective method is to manually pull the weeds out by hand. You can also spot-treat weeds with a non-selective herbicide, but be careful not to apply it to your St Augustine grass.
What is a homemade weed killer for St Augustine grass?
A mixture of vinegar, salt, and dish soap can be an effective homemade weed killer for St Augustine grass. However, be careful not to apply it too heavily as it can damage your lawn.
