St Augustine grass is a type of lawn that can be difficult to kill. There are many different weed killers that can be used on St Augustine grass, but some weed killers may not work well on this type of grass. Before using any weed killer, read the product label carefully to see if it is safe for use on St Augustine grass.
Many different weed killers can kill St Augustine grass weeds, but some are better than others. Some of the best weed killers for killing st Augustine grass include
- Acetic acid
None of these weed killers are harmful to humans or pets, but they may be detrimental to plants. Before using any of these weed killers on st Augustine grass, be sure to read the product label carefully.
Glyphosate is a safe herbicide that can be used on most lawns. Still, it is especially effective at killing St Augustine grass. If you want to kill st Augustine grass without harming other plants in your garden, glyphosate would be the weed killer for you.
Diazinon and acetic acid are also good weed killers for killing st Augustine grass. Still, they may also be harmful to other plants in your garden. Formaldehyde is a dangerous weed killer that can be very harmful to humans and pets if not used properly.
All Rounder Weed Killer
If you are looking for an all-around weed killer that can be used on St Augustine grass and other types of lawn, glyphosate would be a good choice. However, if you are concerned about the dangers of using weed killers on your plants, Diazinon, and acetic acid may be better choices. Formaldehyde should be used with extreme caution, if at all.
Our Top Picks:
Gordon’s SpeedZone Lawn Weed Killer: Fast Weed Killer For Large Property Owners.
Tenacity Turf Herbicide: Â Post Emergent Weed Killer For St Augustine Herbicide.
Green Gobbler 20% Vinegar Weed & Grass Killer: Â Best Herbicide For St Augustine Grass.
Comparison of 6Â Best Weed Killer For St Augustine Grass in 2024
|View on Amazon
|Gordonâ€™s SpeedZone Lawn Weed Killer
|â—Â Â Â Â Highly Effective
â—Â Â Â Â Time-saving
â—Â Â Â Â Large area coverage
|Tenacity Turf Herbicide – 8 ounces
|â—Â Â Â Â Effective weed killers
â—Â Â Â Â Wide coverage area
â—Â Â Â Â Long shelf life
|Roundup Ready-To-Use Weed & Grass Killer
|â—Â Â Â Â Reasonable price
â—Â Â Â Â fast and effective
â—Â Â Â Â Better in quality and quantity
|Green Gobbler 20% Vinegar Weed & Grass Killer
|â—Â Â Â Â Highly Effective
â—Â Â Â Â Time-saving
â—Â Â Â Â Large area coverage
|The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control
|â—Â Â Â Â Cost-efficient
â—Â Â Â Â Simple and easy to use
â—Â Â Â Â Adequate Up to 30 types of weeds killers
|Natural Armor Weed and Grass Killer
|â—Â Â Â Â Chemical-free
â—Â Â Â Â Best Natural weed killer
â—Â Â Â Â Fast-acting
Best Rated Weed Killer For St Augustine Grass Reviews in 2024
1 Gordon’s SpeedZone Lawn Weed Killer, 20 Ounces, 652400:
If it is about having a powerful weed killer that will take care of your St Augustine grass, Gordon’s SpeedZone is the product for you. This lawn weed killer is designed to quickly and easily eliminate unwanted vegetation, including grasses, weeds, and shrubs. Plus, its 652400 strength provides the necessary power to get the job done quickly and easily.
St Augustine grass is a hard nut to crack with non-specific weed killers because it may kill or inhibit it at the moment of use. Still, it will grow back constantly within a few days. So Gordon’s SpeedZone is the best weed killer for st Augustine grass because it kills all types of plants and inhibits their growth.
The best part of the product is that it has the ability to cover large lawns and properties because it can cover anywhere between 14000 Sq Ft to 18000 sq ft. It makes it the best weed killer for st Augustine grass because it kills all types of plants quickly and easily with its 652400 strength.
Gordon is immensely effective against turfgrass types, so it stands apart from other weed killers in the market. It is also the most economical product because you only need a small quantity to cover a large area.
But I will say that it has a drawback: it can be a bit difficult to use for first-timers. It also has a strong odor which may be off-putting for some people. Nevertheless, Gordon’s SpeedZone is still the best weed killer to clear your lawn from St Augustine grass in hours.
In the debate on the best weed killer for st Augustine, this weed killer will not let anyone talk against its qualities. The product is highly effective against all types of plants, is time-saving, and can cover a large area. The only drawback is the strong odor. Overall, Gordon's SpeedZone weed killer should be your first choice when it comes to having the best out of rest.
2 Tenacity Turf Herbicide - 8 ounces:
Tenacity Turf herbicide is well known for its effective pre and post-emergent weed-killing service. The herbicide is especially effective on broadleaf weeds, such as dandelion, clover, and thistle. This product can also be used on turfgrass.
The active ingredient in Tenacity is glyphosate which targets both the upper and lower plant parts of the weed. St Augustine grass can be killed easily using this weed-killer herbicide because of its potent inhibitor formula and the ability to penetrate the turfgrass surface.
Tenacity is safe for both people and pets, making it an excellent choice for homeowners and businesses. This product can also be used on golf courses, athletic fields, playgrounds, and other areas where weed control is essential.
Tenacity comes in an 8-ounce bottle with a sprayer that makes applying the herbicide to your desired area easy. The bottle is easy to open and refill, making it convenient for homeowners. This product is also environmentally friendly, making it a good choice for those concerned about its impact on the environment.
Mesotrione is one of its main ingredients, making it extensively usable with several weeds and pests. This covers 40% formulation and has a good record of killing weeds and not letting them grow with constant speed.
If you have a small lawn and want to use a minimal amount of weed killer at one time, you can buy this one. It has up to 8 years of shelf life and stays active for years to help you kill the weed.
You may get it as a drawback because it does kill the grass but leaves a residue on it that needs to be cleaned off with water. One of the downsides to this product is that it can be challenging to apply. It may require multiple applications to achieve desired results. Additionally, Tenacity can be a bit pricey compared to other weed killers.
Tenacity is one of the most extensively used weed killers in the market due to its strong inhibition properties and ability to penetrate the turfgrass surface. This herbicide can be used on lawns, gardens, sporting fields, and other areas where weed growth is a problem.
3 Roundup Ready-To-Use Weed & Grass Killer:
Roundup weed killers need no justification to prove their effectiveness against weeds. They are highly rated weed killers known for quickly and efficiently taking care of weeds in your garden. This particular weed killer is a 3-in-1 product used as a herbicide, fungicide, and nematocide. It has a pump 'n go sprayer that makes it easy to apply the product where you want it. The 1.33-gallon size is excellent for small gardens or patios.
Roundup weed killers have the quality to kill the weeds to the roots and will leave the garden looking clean and tidy. The pump' n go sprayer makes it easy to get the product where you want it, no matter how large the area is. It is easy to apply and will not harm plants or animals in your garden when you use it.
Another reason this weed killer is an excellent option for st Augustine is its entirely convenient no-mix formula. There is no need to worry about getting the proportions wrong or wasting the product. Pump the weed killer onto your weeds and garden, and you are good to go.
It is highly efficient and shows results within 3 hours of direct application. It is also non-toxic to humans and pets. All in all, it is usable even on flowers and vegetable plants, making it a perfect choice for those who have a garden.
The one downside of this weed killer is that it has been known to cause damage to other plants in the vicinity if it is not used correctly. It is essential to read the instructions for the product before applying it so that you do not damage your garden or injure yourself.
This particular weed killer has a bit of a pungent smell. But, the Roundup Ready-To-Use Weed & Grass Killer Sprayer is an excellent product for taking care of weeds in your garden. It's easy to use and effective against all types of weeds. It comes with a one-year warranty.
Overall, this weed killer is an excellent choice for anyone who wants an easy and convenient way to get rid of weeds in their garden. It is highly efficient and will show results within a few hours. However, it is essential to be aware of the risks associated with its use and use it correctly to avoid damage to plants or oneself.
4 Green Gobbler 20% Vinegar Weed & Grass Killer:
Green Gobbler 20% Vinegar Weed & Grass Killer is a great choice for killing weeds and grasses in your garden or lawn. If you are looking for the best weed killer to kill st Augustine grass, Green Gobbler may be the perfect option. This product is made with 20% vinegar and is free of glyphosate, making it an effective killer of weeds and grasses. This product is also safe to use around children and pets, making it an excellent choice for those who want to avoid chemicals in their yards.
One of the significant causes of not using weed killers is potentially cancerous chemical formulation chemicals, but this is 100% safe to use. The 20% formula is four times stronger than regular vinegar. So, if you are looking for a weed killer that is effective and safe to use, then Green Gobbler 20% Vinegar Weed & Grass Killer may be the perfect option.
Another great reason which makes it stand out is that it is a complete organic weed killer. It is safe to use, but it is also eco-friendly and free of harmful chemicals. Removing the weed within hours can dedicate the whole growth in less than 24 hours, making it stand apart from other market products. The product also comes with a money-back guarantee if you are not satisfied with the results.
It is multipurpose and does not limit its use to a static location. You can use it anywhere on your sidewalks, blocks paving, driveways, and anywhere you see specific growth of grass. It does not harm trees, flowers, or other plants, so you can use it freely around them.
I wouldn't say I like its strong vinegar smell, but that can easily be masked with some air fresheners. If they could have flavored it with an aroma, it would have been better to use, but still, it is a decent product that is quite effective for killing weeds in St Augustine grass.
Overall, Green Gobbler 20% Vinegar Weed & Grass Killer is a great product that is safe to use and effective at removing weeds. It comes with a money-back guarantee if you are not satisfied with the results and is multipurpose, allowing you to use it in various locations. If you are looking for a safe and effective weed killer that is versatile, Green Gobbler 20% Vinegar Weed & Grass Killer may be the perfect option.
5 The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control:
The Anderson barricade weed control is a choice of professional who use this weed killer to remove any vegetation from St Augustine grass. This product is effective and safe to use; it is not harmful to the environment or your pets. With this weed killer, you will be able to clear any unwanted vegetation and keep your lawn looking its best.
It has a granular formulation which makes it easy to spread and will cover a large area. This product is also safe for use in gardens and landscaping. This weed controller can be equally effective against up to 30 different grass and leaf weed-killing. Moreover, it is long-lasting and will keep your lawn looking great for weeks.
Weed control is harmless and can be used to save desirable plants. It can restrict the growth for a more extended period and help control and decay the weeds at high speed. Turf professionals use it, and they highly recommend using it in the fall and spring seasons only.
It is not smelly because it is in semi-solid granules form, making it mix with soil fast and spread evenly. After using this product, you will not have to worry about any residues left behind, as it is non-toxic and biodegradable.
As the weed killer is safe for pets and children as well. It will not harm their skin or eyes and can be used on lawns and gardens. You will not have to worry about damaging your plants or turf.
It is available in both a spray and granule form. You can easily find it, and it also comes with a warranty, so no worries if you don't see it valuable enough to kill weeds in your grass. You Can also check the How to Kill Weeds Between Pavers.
I would say that it is a drawback that it does not kill all the weeds. It is not a magic wand and will not instantly solve your weed problem. You will still have to follow up with other methods like pulling or mowing to get rid of weeds. Still, for casual use against weeds of st Augustine, it will be effective enough to solve your problem.
Overall it is one of the best lawn weed killers for St. Augustine. I would recommend this product to anyone looking for an effective and safe way to get rid of weeds in their grass. It is easy to use and comes with a warranty if you don't find it compelling. I would also recommend this product to pet owners and children as it is nonpoisonous and biodegradable.
6 Natural Armor Weed and Grass Killer:
This natural armor weed and grass killer is one of the best choices in the list of best weed killers for St Augustine grass. It acts the same on weeds as the boss acts on internees. Because it has no glyphosate, it is a good choice for those looking for an all-natural weed killer that will not harm their plants. It comes in 128 oz. Gallon container, so you will have plenty of product to use on your lawn.
It contains no harmful chemicals, so your plants will be safe while you use it on your lawn. It is also an excellent choice for those looking for an environmentally friendly option when it comes to weed killers. What I liked most about this weed killer most that it is straightforward to use. Just spray it on the weeds and then wait for it to work its magic. You will not have to worry about any adverse effects on your plants or environment.
Another great feature is no limitation to be used in a specific place means it is perfectly adequate at any site you use it. No glyphosate means you can use it in areas where children and pets are active but are aware of it when they are not near because the direct application is not a good experiment.
On trust factors, you can go blindly for this product, and if still, you do not find it suitable for your needs, you can return the product as it comes with a 30-day money-back guarantee. There is not a single factor that will stop you from buying this product for killing weed in st Augustine grass. Also, check How to Use Weed Killer Without Ruin Plant.
One potential downside is that it is not very effective against broadleaf weeds. So if you have a lot of those on your lawn, you may need to use another weed killer. Overall, though, this weed killer is easy to use and has nearly no side effects if used correctly, making it a good choice for most people.
Overall this product is a good choice for killing the weed. It is counted as one of the best natural weed killers on the market, making it highly recommendable. It is easy to use and has nearly no side effects if used properly. If you are looking for a weed killer that can get the job done quickly and without any adverse effects, this is an option you should go with. Also, Check the Best Weed Killer For Bermuda Grass.
While buying weed killer for St Augustine grass, you may want to look into these five to six factors. These factors will surely help you find a perfect match for your needs.
1. Type of weed killer:
There are three types of weed killers that can be used on St Augustine grass - organic, synthetic, and chemical. Organic weed killers are the best option as they kill the weeds without harming the plants, while synthetic weed killers work by damaging the plant's cells. Chemical weed killers, on the other hand, kill both the weeds and the plants; hence, they are not recommended for use on St Augustine grass.
2. Strength of weed killer:
The strength of weed killers can vary significantly, from the weakest products that only kill the weeds sparsely to the most robust products that can completely eradicate the plants. Choosing a strong enough effect to kill weeds without harming your plants is essential.
3. How frequently will you need to use it:
Weed killers can be used once or multiple times per week, depending on the severity of the weed problem. It is essential to consult the product label to determine how often it should be used.
4. What kind of plants will it kill:
Weed killers can kill both broadleaf and grass plants, depending on their formulation and strength. It is essential to read the product label carefully before using it to know which types of plants it can kill.
5. How much it will cost:
Weed killers can range in price from very affordable to quite expensive. It is essential to consult the product label before purchasing to ensure that you get the best value for your money.
6. How to use it:
Weed killers should be applied directly to the weeds using a spray bottle or hose. Be sure to read the product label carefully before using it, as there may be specific instructions for use.
Although weed killers can be a necessary tool for removing unwanted plants from your garden, it is essential to use caution when using them. Always follow the product label instructions carefully, and never apply them directly to your plants. Additionally, water your plants well after using a weed killer to avoid damaging them.
Q: What is the best weed killer for st Augustine grass?
A: There is no one-size-fits-all answer to this question, as the best weed killer for st-Augustine grass will vary depending on the type of weed killer, the specific condition of your grass, and your personal preferences. However, some popular options are often recommended on St Augustine grass.
Q: What are some of the potential side effects of using a weed killer on St Augustine grass?
A: While there are no definitive answers to this question, some potential side effects of using a weed killer on st Augustine grass may include damage to the grass or soil, irritation of the skin, and breathing problems. It is essential to be aware of these potential side effects before using a weed killer.
Q: What are some tips for using a weed killer on st Augustine grass without damaging the grass?
A: Some tips for using a weed killer on st Augustine grass without damaging the grass may include using a diluted or non-toxic weed killer, applying the weed killer evenly and sparingly, and using a weed killer that is specifically designed for use on St Augustine grass. It is also essential to take the time to read the product label before using a weed killer.
In conclusion, our top pick for the best weed killer for st Augustine grass is Roundup Original. It is effective and safe, making it an excellent choice for those looking to get unwanted plants. If you are looking for a more environmentally-friendly option, consider using an organic weed killer instead. Regardless of which one you choose, read the instructions carefully before using it to avoid any potential accidents.