If you’re looking for a way to get rid of grub worms in your St. Augustine grass, you’re not alone. Grub worms are a common pest that can wreak havoc on your lawn if left untreated. The good news is that there are many products on the market that can help you get rid of them. But with so many options available, how do you know which one is the best grub killer for St. Augustine grass?
Before buying any grub killer product, there are several factors that readers need to consider. First, it’s important to identify the extent of the infestation. For minor infestations, a natural solution may be enough. However, for severe infestations, a stronger chemical solution may be needed. It’s also important to consider the safety of the product for both humans and pets, as well as its effectiveness and ease of use.
If you’re still unsure about which product to choose, here are some questions that can help you make an informed decision. Does the product work on both grubs and other lawn pests? Is it safe to use around children and pets? How easy is it to apply? Does it require multiple applications, and if so, how often? By considering these questions, you can find the best grub killer for St. Augustine grass and protect your lawn from further damage.
10 Best Grub Killer For St Augustine Grass
# | Product Image | Product Name | Product Notes | Check Price |
---|---|---|---|---|
1
|
Ideal for controlling weeds, preventing fire ants, and providing fertilizer for lawns in southern regions.
|
|
||
2
|
This product is ideal for preventing crabgrass, chickweed, oxalis, foxtail, and other weeds in lawns up to 5,000 sq. ft.
|
|
||
3
|
The product is ideal for killing a variety of insects such as ants, fleas, ticks, chinch bugs, mole crickets, and cutworms in lawns and gardens.
|
|
||
4
|
This product is ideal for protecting yards and gardens against various insects such as ants, spiders, ticks, armyworms, fleas, and grubs.
|
|
||
5
|
This product is ideal for controlling and preventing grubs in lawns and gardens.
|
|
||
6
|
This product is ideal for controlling grubs and other insects in a 2,500 square foot area using all-natural ingredients.
|
|
||
7
|
It is ideal for controlling and eliminating insects that harm lawns.
|
|
||
8
|
BioAdvanced Ready-to-Spread Granules are ideal for controlling grubs and other lawn damaging pests throughout the season.
|
|
||
9
|
This product is ideal for controlling grubs and revitalizing turf throughout the growing season.
|
|
||
10
|
Ideal for preventing lawn damage caused by grubs and other subsurface insects throughout the growing season.
|
|
1. Scotts 3-In-1 Lawn Care Solution

The Scotts Turf Builder Southern Triple Action is a top-quality product that offers a three-in-one formula designed specifically for Southern grasses. It is ideal for those who want to keep their lawns looking healthy and well-manicured throughout the year.
One of the primary benefits of this product is that it kills a wide range of lawn weeds, including dollarweed, dandelion, clover, oxalis, plantain, chickweed, and henbit. This makes it an excellent choice for those who want to eliminate unsightly weeds from their lawn effectively.
In addition to its weed-killing properties, the Scotts Turf Builder Southern Triple Action also prevents and kills fire ants for up to six months. It also controls other pests such as armyworms, fleas, mole crickets, chinch bugs, sod webworms, and ticks. By using this product, homeowners can keep their lawns free from harmful insects that can damage the grass and make it look unsightly.
The Scotts Turf Builder Southern Triple Action also feeds and strengthens lawns against heat and drought. It is specifically designed for use on St. Augustinegrass (including Floratam), Centipedegrass, Zoysiagrass, and Carpetgrass. This makes it an ideal choice for those who live in areas with hot and dry climates.
To use the product, homeowners simply need to apply it to their lawn with a Scotts spreader and then water it in immediately. It is essential to apply the product when grass and weeds are actively growing to ensure maximum effectiveness. One 26.64 lb. bag of this product can treat up to 8,000 sq. ft. of lawn, making it a cost-effective solution for homeowners with large yards.
The Scotts Turf Builder Southern Triple Action is available in several states, including AL, AR, FL, GA, KS, LA, MO, MS, NC, NM, OK, SC, and TX. Overall, this is an excellent product for homeowners who want to keep their lawns looking healthy, green, and free from weeds and pests.
2. Weedex With Halts: All-Season Crabgrass Prevention

Scotts WeedEX Prevent with Halts is a highly effective pre-emergent herbicide that provides season-long protection against crabgrass. This innovative formula stops crabgrass before it even has a chance to grow, ensuring that your lawn remains beautiful and healthy all year round.
To use Scotts WeedEX Prevent with Halts, simply apply it in the early spring for season-long prevention of crabgrass. This will also help prevent other grassy and broadleaf weeds such as foxtail, spurge, oxalis, and more. If you missed the early spring application, Fall application is also an option to prevent winter weeds such as poa annua, henbit, and chickweed.
Scotts WeedEX Prevent with Halts is suitable for use on all types of lawns and grass, except for dichondra or bentgrass. This means that no matter what kind of grass you have, you can rely on this product to effectively tackle crabgrass and other weeds.
With its powerful pre-emergent control formula, Scotts WeedEX Prevent with Halts is a must-have for anyone looking to maintain a healthy and beautiful lawn. By preventing the growth of crabgrass and other weeds, this product helps keep your lawn looking lush and green, without the unsightly patches that weeds can cause.
3. Bug B Gon Lawn Insect Killer: Kills All.

Looking for a reliable and effective solution to get rid of home invading insects and bugs? Look no further than this powerful insecticide, designed to eliminate a wide range of pests, including ants, fleas, ticks, chinch bugs, spiders, cutworms, mole crickets, and sod webworms.
This insecticide is designed to kill and prevent infestations both above and below the surface for up to three months, providing long-lasting protection against a variety of pests. It can be used on lawns, ornamentals, home perimeters, listed edibles (in vegetable gardens), and flower beds, making it a versatile solution for all your pest control needs.
To get the best results, it is recommended to apply this insecticide proactively in early spring or summer to prevent infestation, or at the first sign of insect damage or activity. It can treat up to 10,000 sq. ft., making it a great choice for larger properties.
4. Bugclear Yard Defender – Protects 16k Sq. Ft.

The Ortho BugClear Lawn Insect Killer1 is a reliable solution for protecting your lawn and garden from pesky insects. This product is specially formulated to kill insects on contact and starts working within minutes, except for fire ants. It is effective in both above and below ground applications, providing long-lasting control against a variety of insects.
With a residual control of up to 3 months against spiders, ticks, armyworms, and beetles and up to 6 months against ants, this insect killer provides long-lasting protection for your lawn. The product label provides a comprehensive list of insects that can be controlled with this product.
The fast-acting granules start to kill lawn bugs and garden insects in minutes, excluding fire ants. The Ortho BugClear Lawn Insect Killer1 can be used to protect your lawn, ornamentals, home perimeter, vegetable garden, and flower beds. By eliminating pesky insects outdoors, you can prevent them from invading your home.
This product is easy to use. For best results, apply with a Scotts Spreader as soon as you notice insect activity or damage. After application, water the area to activate the product. One package of this insect killer can treat up to 16,500 square feet of lawn, making it an affordable and efficient solution for protecting your outdoor spaces.
5. St Gabriel Organics 80080-P Milky Spore Grub Control Mix Pest Controller

The 20 Lb. Milky Spore Grub Control Spreader Mix is an organic compound that effectively attacks the larvae of Japanese beetles. This product is perfect for those who want to keep their lawn and garden free from grubs. It is easy to apply with any standard spreader and can be used from spring through fall, making it a versatile solution for grub control.
This product is incredibly effective at killing grubs and can provide up to 15 to 20 years of coverage, ensuring that your lawn and garden remain healthy and free from damage caused by these pests. With a coverage area of up to 7,000 square feet, you can effectively protect a large area with just one application.
The Milky Spore Grub Control Spreader Mix is an all-natural product that is safe for use around pets and children. It is a great alternative to harmful chemical pesticides that can have negative effects on the environment and your health.
6. Lawnbox Grubout 100% Organic Grub Control Insecticide 8.25 Lb Bag Covers 2,500 Sq Ft

Looking for an effective way to control grubs and prevent lawn damage? Look no further than this 100% organic biological insecticide, which is listed by the Organic Materials Review Institute (OMRI) for its effectiveness in controlling grubs. This product is perfect for those looking to prevent damage to their lawn caused by grubs and animals that feed on them.
One of the major benefits of using this insecticide is that it helps to control the population of other insects such as beetles, chafers, weevils, and emerald ash borers. By targeting grubs, this product helps to control the population of these damaging insects, which can lead to a healthier lawn overall.
Another important advantage of this insecticide is that it is non-toxic to insects, pollinators, and birds. This means that you can use it without worrying about harming beneficial insects such as bees, butterflies, and other pollinators. It's also family-friendly, as your yard is safe to use immediately after applying the product.
It's important to note that this product is not for sale in certain states, including CA, FL, ME, NM, NY, OR, and WA. However, if you live in an area where this product is available, you can enjoy the benefits of a healthier lawn without worrying about harmful chemicals or environmental damage.
7. Lawn Defense Insect Granules – Spectracide Triazicide

This lawn insect killer is an effective solution for homeowners looking to combat insect infestations in their lawn and around the perimeter of their homes. It is designed to kill over 100 types of insects both above and below ground, including crickets, cutworms, ticks, and grubs, among others.
This product is formulated with granules that are easy to distribute uniformly around the treatment area. The recommended application is to water the granules lightly immediately after application. This will help to activate the formula and ensure that it is evenly spread across the area.
This lawn insect killer is ideal for treating insects when they first appear or when you notice lawn damage. It is also an effective solution for controlling grubs in your lawn and soil. It is recommended to apply the product when insects and grubs are active in the lawn and soil.
One of the key benefits of this lawn insect killer is that it works on contact. This means that it is designed to kill insects as soon as they come into contact with the formula. This can help to prevent further damage to your lawn and home.
8. Bioadvanced Season Long Grub Control, Ready-To-Spread Granules For Insects, 10 Lb

This lawn insecticide is a powerful solution to help keep your lawn free from destructive insects. It is designed to kill grubs and other lawn damaging insects both above and below the surface. With its season-long control, this insecticide starts to work immediately and protects your lawn all season long.
The product is formulated to eliminate 40+ destructive lawn insects, such as ants, ticks, mole crickets, chinch bugs, European crane fly larvae, crickets, and more. This makes it a versatile solution that any homeowner can rely on to get rid of various pests.
This insecticide can be used on lawns and as a barrier treatment. Its new and improved formula can kill listed insects in the lawn while creating a barrier for season-long protection. This means that it not only eliminates existing pests but also prevents future infestations.
With a coverage of up to 5,000 sq. ft., this insecticide can effectively treat a large area of your lawn. It is easy to use and can be applied with a sprayer or a spreader.
9. Bioadvanced Season Long Grub Control Plus Turf Revitalizer, Granules, 12 Lb

This product offers a reliable solution for those looking to protect their lawn from grubs and other harmful insects. With its 2-in-1 formula, it not only kills grubs but also promotes strong roots and thicker turf.
One application of this product provides season-long protection against grubs, saving you the hassle of frequent reapplication. In addition to grubs, it also effectively targets Mole Crickets, European Crane Fly Larvae, Billbugs and more, making it a versatile insect killer.
Moreover, this product doubles as a turf revitalizer, increasing turf root mass for thicker and stronger turf. It covers an impressive area of up to 5,000 square feet, making it an ideal choice for large lawns.
It is important to note that this product is restricted in certain states, including NY, CT, VT, MD, MA, and ME. Therefore, it is advisable to check with local authorities before purchasing this product in those areas.
10. Scotts Grubex1 Season Long Grub Killer 5,000 Sq Ft

Scotts GrubEx is a powerful insecticide that provides long-lasting protection against grubs and armyworms. With just one application in the spring or early summer, this product can effectively kill and prevent these pests for up to 4 months.
Grubs and armyworms can cause significant damage to lawns by feeding on the roots and leaves of grasses, which can lead to thinning and patchiness. Scotts GrubEx helps prevent this damage by killing the insects before they can cause harm. This results in a stronger and healthier lawn.
One of the unique benefits of Scotts GrubEx is that it targets grubs when they are young, which helps to prevent turf damage later on. This is because young grubs are more vulnerable to insecticides, and eradicating them early on can prevent their population from growing and causing more significant damage.
Compared to the original GrubEx product, Scotts GrubEx kills 25% more types of grubs, making it more effective against a wider range of pests. This ensures that your lawn receives comprehensive protection against a variety of insect threats.
In addition to its exceptional performance, Scotts GrubEx is also designed to work seamlessly with Scotts spreaders. This ensures that the product is evenly distributed across your lawn, providing uniform protection against grubs and armyworms.
Best Grub Killer For St Augustine Grass FAQs
Are there any specific instructions for applying the grub killer to St. Augustine grass?
Yes, there are specific instructions for applying grub killer to St. Augustine grass. Firstly, it is important to identify the type of grubs that are infesting your lawn as different grub killers are formulated to target specific types of grubs. Secondly, it is crucial to follow the instructions on the product label carefully, as different brands of grub killers may have varying application rates and methods.
Typically, grub killer should be applied to St. Augustine grass in the late spring or early summer, when the grubs are close to the surface and most vulnerable. It is important to water the lawn thoroughly before applying the grub killer, as this helps to activate the product and ensure it penetrates deep into the soil. It is also advisable to mow the grass to a shorter length before applying the grub killer, as this helps to expose the grubs and make them more susceptible to treatment.
Overall, it is important to follow the instructions on the product label carefully, and to take precautions to ensure the safety of pets and children during and after application. If you are unsure about how to apply grub killer to St. Augustine grass, it may be helpful to consult with a lawn care professional.
Can the grub killer harm the St. Augustine grass or other plants in the lawn?
Grub killers are designed to target and eliminate grubs, which are the larvae of various types of beetles that can cause damage to lawns by feeding on grass roots. While these products can be effective in controlling grub populations, they may also have an impact on other organisms in the lawn, including St. Augustine grass and other plants.
Some grub killers contain chemicals that can be harmful to certain types of grass or plants, particularly if they are not applied correctly or in the right amounts. For this reason, it is important to read the label carefully and follow the instructions closely when using any type of grub killer.
In general, however, most grub killers are relatively safe for St. Augustine grass and other common lawn plants, as long as they are used as directed. If you are concerned about the potential impact of a grub killer on your lawn or garden, it may be a good idea to consult with a professional landscaper or pest control expert for advice on the best approach to managing grubs and other pests in your yard.
Does the type of soil affect the effectiveness of the grub killer on St. Augustine grass?
Yes, the type of soil can affect the effectiveness of the grub killer on St. Augustine grass. This is because certain types of soil can absorb the grub killer differently, affecting its ability to reach and eliminate the grubs. For example, sandy soil tends to drain water and chemicals faster than clay soil, which can result in the grub killer being less effective in sandy soil. In addition, soil pH can also affect the effectiveness of the grub killer. If the soil pH is too acidic or alkaline, it can affect the chemical properties of the grub killer and make it less effective. It's important to read the label instructions carefully and choose a grub killer that is suitable for the type of soil in your lawn. If you're unsure about the type of soil in your lawn, you can have a soil test done to determine its composition.
How effective is the grub killer for St. Augustine grass?
Grub killers can be effective in controlling grubs in St. Augustine grass. Grubs are the larvae of beetles, and they can cause damage to lawns by feeding on the roots of grass. This can lead to brown patches and weakened grass that is more susceptible to other issues like disease and drought.
There are many different types of grub killers available, including chemical and organic options. It's important to choose a product that is specifically formulated for St. Augustine grass and follow the instructions carefully. It's also a good idea to apply the product in the late summer or early fall when grubs are most active and vulnerable.
While grub killers can be effective, they may not be a permanent solution to the problem. It's important to also address the underlying issues that may be attracting beetles to your lawn, such as excessive thatch or overwatering. Regular maintenance practices like proper watering and fertilization can also help keep your grass healthy and less susceptible to damage from grubs.
How long does it take for the grub killer to work on St. Augustine grass?
The time it takes for grub killer to work on St. Augustine grass depends on several factors such as the type of product used, the severity of the infestation, and the environmental conditions. Typically, most grub killers require a few weeks to start showing results. However, some fast-acting products claim to eliminate grubs within 24 hours.
It is important to note that while grub killers can effectively control the grub population in your lawn, they may not provide a quick fix for the damage already caused by the grubs. Therefore, it is crucial to take preventative measures and apply grub killer before the damage occurs.
To ensure the best results, it is recommended to follow the manufacturer's instructions carefully, apply the product at the right time, and water the lawn after application to activate the product. If you are unsure about which product to use or how to apply it, consult with a lawn care professional or a knowledgeable salesperson at your local garden center.
How often should the grub killer be applied to St. Augustine grass?
The frequency of applying grub killer to St. Augustine grass depends on the type of grub killer you are using. Some grub killers are designed to work for several months, while others need to be applied more frequently. It is important to read the instructions on the label carefully and follow them closely to ensure that you are applying the product correctly.
In general, most grub killers should be applied in the late spring or early summer when the grubs are actively feeding near the surface of the soil. This will allow the product to be most effective in eliminating the grubs before they cause significant damage to your lawn. If your lawn has a history of grub infestations, you may want to consider applying the product preventatively in the early spring or fall to avoid future infestations.
Ultimately, the best course of action is to consult with a lawn care professional or the manufacturer of the grub killer product to determine the appropriate frequency of application for your specific situation.
Is the grub killer safe for pets and children?
The safety of grub killer for pets and children depends on the specific product being used. Some grub killers contain chemical ingredients that can be harmful if ingested or inhaled by pets or children. However, there are also natural and organic options available that are safer for both pets and children.
Before using any grub killer, it is important to read and follow the label instructions carefully. This will provide information on any potential hazards and how to safely use the product. It is also recommended to keep pets and children away from the treated area until the product has dried or settled into the soil.
If you have concerns about the safety of a specific grub killer product, it is best to consult with a veterinarian or pediatrician for advice. Alternatively, you may consider using natural methods such as nematodes or beneficial insects to control grubs in your lawn or garden.
What are some natural alternatives to chemical grub killers for St. Augustine grass?
There are a few natural alternatives to chemical grub killers for St. Augustine grass that you can consider. One option is to introduce nematodes, which are tiny microscopic worms that feed on grubs and other pests in the soil. You can purchase nematodes at your local garden center and apply them to your lawn according to the instructions on the package.
Another option is to use organic products that are specifically designed to control grubs. These products are made from natural ingredients such as neem oil, garlic, and pepper. They work by repelling or disrupting the life cycle of the grubs, making it harder for them to survive.
You can also try to encourage natural predators of grubs, such as birds and other wildlife, to your lawn by providing them with food and shelter. Additionally, maintaining healthy, well-fertilized soil and a regular watering schedule can help to prevent grubs from infesting your lawn in the first place.
Overall, there are several natural alternatives to chemical grub killers that you can use to protect your St. Augustine grass while minimizing the impact on the environment.
What is the best grub killer for St. Augustine grass?
When it comes to choosing a grub killer for St. Augustine grass, it's important to select a product that will effectively target and eliminate the grubs without harming your lawn. One of the best grub killers for St. Augustine grass is a product that contains the active ingredient imidacloprid. This chemical targets the nervous system of the grubs and effectively kills them. One popular brand that contains imidacloprid is Bayer Advanced Grub Killer. It's important to follow the instructions on the product carefully and apply it at the appropriate time of year when the grubs are most active. Additionally, it's important to maintain a healthy lawn with proper watering and fertilization to prevent further infestations. If you are unsure about which product to choose or how to apply it, it's always a good idea to consult with a lawn care professional for guidance.
What is the recommended time of year to apply the grub killer to St. Augustine grass?
The recommended time of year to apply grub killer to St. Augustine grass varies depending on the region you are in. However, in general, it is recommended to apply grub killer in late spring or early summer, when the grubs are actively feeding on the roots of the grass. This is usually around May or June.
It is important to apply the grub killer when the grubs are in the early stages of their development, as this is when they are most susceptible to the treatment. Waiting too long can result in the grubs becoming larger and more difficult to control.
It's also important to follow the instructions on the product label carefully and apply the product evenly over the affected areas. Be sure to water the grass thoroughly after applying the grub killer to ensure it is absorbed into the soil and reaches the grubs.
If you are unsure about the best time to apply grub killer to St. Augustine grass in your region, it's always a good idea to consult with a local lawn care professional or gardening center for advice.