10 Best St Augustine Weed and Feed Options for a Healthier Lawn in 2026

The BioAdvanced 3-in-1 Weed and Feed for Southern Lawns is a granular product that combines three essential lawn care tasks into one convenient bag. It kills existing broadleaf weeds, prevents new ones from sprouting for up to six months, and fertilizes your grass to promote a thicker, greener lawn. This product is specifically designed for southern lawns including Bermudagrass and St. Augustinegrass, making it a targeted solution for homeowners in warmer climates.

One of the standout features is its ability to prevent weeds for up to six months with a single application. This means less time spent reapplying treatments and more time enjoying a weed-free yard. The weed killer tackles common southern invaders like Dandelion, Dollarweed, and Clover, while the fertilizer feeds your lawn for up to three months. Users can expect a noticeable greening effect and stronger turf, especially when applied during active growth periods in temperatures between 50 and 90 degrees Fahrenheit.

In terms of design and build quality, the granules are easy to apply using a broadcast or drop spreader for even coverage. The 10-pound bag covers up to 4,000 square feet, which is generous for most residential lawns. The product is part of BioAdvanced's science-based lineup, known for reliable results without damaging the grass when used as directed. It's a practical choice for those who want a straightforward, all-in-one solution without the hassle of mixing or multiple products.

However, there are a few drawbacks to consider. This formula is strictly for southern lawns, so it won't work on cool-season grasses like fescue or bluegrass. The timing of application is critical: you need to apply it when temperatures are between 50 and 90 degrees and weeds are actively growing. If you miss that window, the weed prevention may be less effective. Additionally, while it kills many broadleaf weeds, it may not control all types, so it's a good idea to check the label for specific weed species.

Overall, the BioAdvanced 3-in-1 Weed and Feed is a solid choice for southern lawn owners looking to simplify their lawn care routine. It delivers on its promises of weed control, prevention, and fertilization in one easy step. While it has some limitations regarding grass type and application timing, for the right lawn, it's a reliable and effective product. If you have a southern lawn and want to cut down on the number of products you use, this is worth considering.

If you have a St. Augustine, Centipede, or Zoysia lawn and you are tired of battling weeds while also trying to keep your grass green, the Fertilome (13917) Weed & Feed is worth a close look. This 25.6-pound bag combines a pre-emergent and post-emergent herbicide with a 15-0-4 fertilizer blend. In plain English, it kills existing weeds, stops new ones from sprouting, and feeds your lawn all in one pass. It is designed specifically for warm-season grasses, so it is not a one-size-fits-all product, but for the right lawn, it could be a game-changer in your spring routine.

The standout feature here is the dual-action formula. Most weed-and-feed products focus on either killing weeds or preventing them, but this one does both. The pre-emergent stops weed seeds from germinating, while the post-emergent tackles weeds that have already popped up. The 15-0-4 fertilizer provides a moderate nitrogen boost (15%) with zero phosphorus, which is ideal for established lawns that do not need extra phosphorus. The potassium (4%) helps with root development and overall stress tolerance. This balanced approach means you can apply it in early spring and enjoy a healthier, weed-free lawn throughout the growing season without having to reapply constantly.

One important thing to note: this product is not for everyone. It is strictly for Centipede, Zoysia, and St. Augustine lawns. If you have Bermuda grass or any northern grass type like fescue or Kentucky bluegrass, do not use it. The label is clear on that point. Also, application timing matters. For best results, you need to put it down in early spring, just as your grass is coming out of dormancy. That might require a little planning, but it is a small price to pay for season-long weed control. The bag covers 5,000 square feet, which is a decent area for most suburban lawns.

In terms of drawbacks, the lack of user reviews is a minor concern. The product has a perfect 4.9 rating, but with zero reviews, that rating is essentially meaningless right now. You are buying based on the brand's reputation and the product specs, not on real-world feedback from other homeowners. Also, the granular formula requires a spreader, so if you do not own one, you will need to factor that in. But for the price, this is a solid, straightforward product that does exactly what it promises.

Overall, the Fertilome Weed & Feed is a smart choice if you have the right grass type and you want a simple, effective way to handle weeds and feeding in one step. It is not flashy, but it gets the job done. Just be sure to follow the label instructions carefully, and you should see a noticeable improvement in your lawn's health and appearance.

Scotts Turf Builder Weed and Feed3 is a dual-action granular product designed to kill existing broadleaf weeds and feed your lawn simultaneously. It targets over 50 weed species, including dandelion, clover, plantain, and purslane, while the fertilizer component helps grass thicken and crowd out future weeds. This makes it a convenient option for homeowners who want to simplify lawn care without juggling separate weed killer and fertilizer applications.

The standout feature is WeedGrip Technology, which helps the granules stick to wet weed leaves for better absorption. In real-world use, many reviewers report significant weed die-off within a week or two, especially on dandelions and clover. However, some tougher weeds like Japanese clover or dollarweed may take longer, and a second application may be needed for heavy infestations. The fertilizer also gives grass a noticeable green-up, which helps mask the bare spots left by removed weeds.

Design and build are straightforward: the granules come in a sturdy 14.29 lb bag that covers up to 5,000 sq ft. Application requires a spreader (Scotts recommended settings are provided) and the lawn must be wet from dew or watering. Avoid watering for 24 hours after application, and do not apply if rain is expected. It works on common grass types like fescue, Bermuda, bluegrass, and ryegrass, but it can cause temporary discoloration on some varieties. It is not approved for St. Augustinegrass, Dichondra, Carpetgrass, or Bentgrass.

Drawbacks include the need for precise application conditions and the fact that some stubborn weeds may resist a single treatment. Also, this product does not prevent future weeds on its own; it only kills existing ones while feeding the grass to make the lawn more competitive. For maximum weed control, you may need to follow up with a pre-emergent in early spring. Additionally, pets and people should stay off the lawn until dusts settle, which is standard for most weed and feed products.

Overall, Scotts Turf Builder Weed and Feed3 is a solid choice for homeowners looking for an effective all-in-one solution. It delivers on its promise to kill common broadleaf weeds while improving lawn health. For best results, apply in spring or early summer when weeds are actively growing, and follow the label instructions carefully. It earns a strong recommendation for those with compatible grass types who want a greener, weed-free lawn without extra steps.

Brand: Scotts

Model: Turf Builder Weed and Feed3

Form: Granules

Coverage: Up to 5,000 sq ft

Active Ingredients: 2,4-D (1.220%), Mecoprop (0.081%)

Grass Types: Bahiagrass, Bermudagrass, Bluegrass, Centipedegrass, Fescue, Ryegrass, Zoysiagrass

Do Not Use On: St. Augustinegrass (including Floratam), Dichondra, Lippia, Carpetgrass, Bentgrass

Application: Apply when grass is wet, temps 60-90°F. Do not water for 24 hours. Max 2 applications per year.

Item Weight: 14.29 lbs (6.48 kg)

Dimensions: 18.5 x 3.5 x 12.5 inches

UPC: 032247250061

If you own a St. Augustine or Centipede lawn, you know the struggle of finding a weed killer that won't wreck your turf. Southern Ag Atrazine Weed Killer is one of the few herbicides formulated specifically for these sensitive southern grasses. It's a liquid concentrate with 4% atrazine that you mix with water and apply with a pump sprayer. The product is designed to kill a wide range of broadleaf and grassy weeds while leaving your lawn intact, making it a go-to for homeowners who want to reclaim a weed-free yard without sacrificing their grass.

Performance is where this product really stands out. Users report excellent results on dollar weed, clover, and even invasive grasses that creep into your lawn from neighbors. It works both as a post-emergent (killing existing weeds) and a pre-emergent (preventing new seeds from sprouting). That dual action means you get longer-lasting control. But don't expect overnight magic. Many reviews note that it takes one to three weeks to see full results, and sometimes a second application is needed for heavy infestations. The key is patience and correct timing: early spring application gives the best results, before weeds have a chance to mature.

Using Southern Ag Atrazine is straightforward but requires care. The concentrated formula means you mix just 4.33 ounces per 500 square feet of lawn. Spray evenly without overlapping because over-application can stress your grass. A pump sprayer is recommended, not a hose-end sprayer, to ensure accurate coverage. The product has a light tan color and a slight chemical odor, but it dries quickly and won't leave unsightly residue. One quart covers 3,720 square feet, which is plenty for most suburban lawns. Some users add a surfactant to improve stickiness on waxy leaves, boosting effectiveness on tougher weeds.

Overall, Southern Ag Atrazine Weed Killer is a reliable, specialized solution for St. Augustine and Centipede lawns. It's not a fast-acting miracle cure, but it delivers steady, thorough control when used correctly. The main drawbacks are the slow action and the need for precise application to avoid damaging your grass. But if you're dealing with persistent broadleaf weeds or dollar weed and want something safe for your southern turf, this is a solid choice. It's backed by strong user reviews and a reasonable price point, making it a smart buy for lawn care enthusiasts who prefer targeted solutions over one-size-fits-all products.

The Scotts Turf Builder Weed and Feed5 is a combination weed killer and lawn fertilizer designed for homeowners who want to simplify their lawn care routine. Instead of applying separate products for weed control and feeding, this granular formula does both in one pass. It targets over 50 types of broadleaf weeds, including stubborn ones like dandelion, clover, plantain, and morningglory, while delivering nutrients to thicken and strengthen your grass. This product is ideal for lawns with grass types such as Bahiagrass, Bermudagrass, Bluegrass, Centipedegrass, Fescue, Ryegrass, and Zoysiagrass, but it should not be used on St. Augustinegrass (including Floratam), Dichondra, Carpetgrass, or Bentgrass.

The standout feature here is the dual action. By killing weeds and feeding the lawn simultaneously, you save time and ensure your grass gets the nutrition it needs to recover and fill in bare spots. The formulation helps crowd out future weeds by promoting dense growth. Coverage is generous with an 11.32 pound bag covering up to 4,000 square feet, which is enough for a typical suburban lawn. Application is straightforward using a Scotts spreader, which provides even distribution - just make sure to apply when the lawn is wet and daytime temperatures are consistently between 60 and 90 degrees F. You can treat up to twice per year, so for most lawns, one bag will last the season.

In terms of build quality, the granular form is easy to handle and store, and the bag dimensions (16.3 x 10.8 x 3 inches) are manageable. The product weight is listed as 0.5 pounds in the specifications, but this seems to be a data discrepancy - the actual product weight is 11.32 pounds as shown in the title. This is likely a label error, and the bag is indeed substantial. It's important to follow the label instructions carefully to avoid harming non-target grass types or over-applying during hot weather.

One drawback is that this product is not suitable for all grass types, especially St. Augustine, which is common in warm climates. Also, the application window (wet lawn, specific temperature range) can be tricky if you have unpredictable weather. Some users might wish for more than two applications per year, but the product's efficacy makes this less of an issue for maintenance.

Overall, the Scotts Turf Builder Weed and Feed5 is a reliable, all-in-one solution for weed control and lawn feeding. It delivers on its promises for the grass types it supports, and the convenience factor is high. If your lawn is compatible and you follow the instructions, this product can save you time and keep your yard looking healthy and weed-free. For most homeowners, it's a solid choice.

BioAdvanced 3-In-1 Weed and Feed for Southern Lawns is a granular lawn treatment designed specifically for warm-season grasses common in the southern United States. It targets homeowners who want an all-in-one solution to kill existing weeds, prevent new ones, and fertilize their lawn - all in a single product. If you have Bermudagrass (except the Ormond variety) or St. Augustinegrass, this product is tailored to your grass type, saving you the guesswork of whether it will be safe.

The standout feature here is the up to 6 months of weed prevention. One application in spring or early summer can keep dandelion, dollarweed, clover, and other listed broadleaf weeds at bay throughout the growing season. That's a major convenience compared to products that require repeat treatments. Plus, the fertilizer component feeds the lawn, promoting greener, thicker turf that naturally crowds out weeds over time. In real-world use, you can expect visible results within a few weeks as weeds die off and grass greens up.

The product comes in a 20 lb bag covering 8,000 square feet. It's formulated as granules that you apply with a broadcast or drop spreader. The process is straightforward: calibrate your spreader to the recommended setting, walk at a steady pace, and you're done. Avoid applying when temperatures are outside the 50-90°F range, as that can reduce effectiveness. Also, water lightly after application to activate the herbicide and fertilizer.

One potential drawback is that this product isn't labeled for all grass types. If you have Ormond Bermudagrass or other sensitive varieties, you'll need to check the label carefully. Additionally, because it's a weed-and-feed combination, you can't spot-treat without also fertilizing the whole lawn. This might be overkill if your lawn doesn't need a full feeding.

Overall, BioAdvanced 3-In-1 Weed and Feed for Southern Lawns is a solid choice for homeowners who want to simplify lawn care. It handles three jobs at once, saves time, and delivers long-lasting results. Just make sure it matches your grass type and you follow the temperature guidelines. For the price and coverage, it offers real value for Southern lawns.

Spectracide Weed & Feed 20-0-0 is a dual-action lawn product that kills broadleaf weeds while fertilizing your grass. It's designed for homeowners who want to save time by tackling two chores at once. The three-pack includes one QuickFlip sprayer and three 32-ounce bottles, each covering up to 7,500 square feet. That's enough for a typical suburban lawn or multiple applications over the season.

The standout feature is the formula itself: 20% nitrogen feeds your lawn for a lush green look, while the active ingredients target over 200 types of broadleaf weeds including dandelion, chickweed, clover, and plantain. The QuickFlip sprayer makes application simple just attach a garden hose and squeeze the trigger. No mixing, no measuring, and no separate sprayer to clean. It's about as convenient as lawn care gets.

In real-world use, you'll see weeds start to curl and die within a week, while the grass gets a noticeable boost in color. The key is applying when weeds are actively growing and the soil is slightly moist. You should water lightly after application to help the fertilizer soak in. One potential drawback: the sprayer is best for spot treating weeds or small patches. If you need to cover the entire lawn uniformly, you might prefer a hose-end sprayer that attaches to a larger bottle. Also, this formula is not recommended for all grass types particularly warm-season varieties like Bermuda or St. Augustine so check your grass type first.

Build quality is good for a consumer product the sprayer head feels sturdy and the bottles are thick plastic. The three-pack is a practical value, ensuring you don't run out mid-season. Overall, Spectracide Weed & Feed is a solid choice if you want a low-effort solution for a weedy, hungry lawn. Just be mindful of the limitations on grass type and coverage method.

Color: White

Size: 32 Fl Oz (Pack of 3)

Dimensions: 7.56 x 5.88 x 11.62 Inches

Product Group: Lawn & Patio

Binding: Unknown Binding

The Southern Ag Atrazine St. Augustine Grass Weed Killer is a specialized herbicide designed for homeowners who have St. Augustine or centipede lawns. If you have one of these warm-season grasses and you are battling broadleaf weeds like dandelions, clover, or chickweed, this product offers a targeted solution. It is formulated to kill those pests while leaving your desired grass unharmed, making it a go-to choice for maintaining a pristine lawn in Southern regions.

One of the standout features of this weed killer is its dual action. It not only kills emerged weeds on contact but also provides pre-emergent control by preventing weed seeds from germinating. Additionally, it suppresses crabgrass, which is a common nuisance in many lawns. This means you can treat your yard with a single product and address multiple weed issues at once, saving time and money compared to using separate treatments.

The product comes as a liquid concentrate in a 1-gallon jug. You mix it with water according to the instructions and apply it with a garden sprayer. The formula is easy to use, and the coverage is generous. For most lawns, a single gallon will treat a substantial area, so you get good value for the price. Users report seeing results within a few days, which is satisfying when you are eager to reclaim your yard from weeds.

However, there are some important limitations. Atrazine is not safe for all grass types. If you have Bermuda, fescue, or other cool-season turf, you should avoid using this product. It can also be persistent in the soil, so be careful not to overapply near flower beds, trees, or shrubs where runoff could cause damage. For heavily infested lawns, you might need a second application after a few weeks, but that is typical for most weed killers.

Overall, the Southern Ag Atrazine Weed Killer delivers on its promises for the right type of grass. It is effective, easy to use, and covers a lot of ground. If you are maintaining a St. Augustine or centipede lawn and are tired of fighting broadleaf weeds and crabgrass, this is a reliable solution that gets the job done without guesswork.

Size: 1 Gallon
Dimensions: 4.2 x 7.4 x 11.9 inches
Weight: 0.27 lbs
Product Group: Lawn & Patio
Binding: Tools & Home Improvement

BioAdvanced Season Long Lawn Weed Killer + Preventer for Southern Lawns is a granular product designed specifically for southern turf types. It targets over 50 listed broadleaf weeds while also preventing crabgrass and other grassy weeds for up to six months. This makes it an excellent choice for homeowners with St. Augustine, Bermuda, Centipede, or Zoysia lawns who want a simple, all-in-one solution for weed control.

One of the standout features is its dual action: it kills existing weeds like dandelion, clover, and dollarweed, and stops new ones (including crabgrass) from sprouting. The coverage of 4,000 square feet per 10-pound bag is generous, so you can treat a decent-sized lawn with a single application. The granules are easy to spread using a rotary or drop spreader, and the product is formulated to be tough on weeds but gentle on your lawn when used as directed.

In terms of real-world performance, the season-long claim is backed by the active ingredients that provide both immediate and residual control. You apply the granules, water them in after 24 hours, and then let the product work. This is a low-maintenance approach compared to multiple spray treatments. The formula is weather-resistant once activated, so you don't have to worry about rain washing it away.

There are a couple of downsides to keep in mind. First, you must water the lawn 24 hours after application to activate the granules; if you skip this step, the product won't work effectively. Second, this is strictly for southern lawns; if you have cool-season grass like fescue or Kentucky bluegrass, this product is not for you. Also, like any granular herbicide, storing the bag in a dry place is important to prevent caking and ensure even spreading.

Overall, BioAdvanced Season Long Lawn Weed Killer + Preventer for Southern Lawns delivers on its promise of convenient, long-lasting weed and crabgrass control. It saves you from multiple applications and is safe for your southern grass when used correctly. For homeowners in warmer climates looking for a reliable, all-in-one solution, this is a solid choice that balances performance with ease of use.

The Hi-Yield Atrazine Weed Killer is a targeted herbicide specifically designed for St. Augustine and Centipede grass lawns. If you're a homeowner in the Southern U.S. battling persistent weeds like dollarweed, henbit, or chickweed, this product offers a practical solution. It contains 4% atrazine, a selective herbicide that kills broadleaf weeds and annual bluegrass while leaving your St. Augustine or Centipede grass unharmed.

The standout feature is its weed control spectrum. It tackles common nuisances such as spurge, moneywort, and pennywort (dollarweed), as well as suppressing annual bluegrass. This makes it a versatile tool for maintaining a clean lawn. The 32-ounce concentrate mixes with water to cover a substantial area, and the application process is straightforward: just use a hose-end sprayer or pump sprayer according to the label instructions.

Design-wise, the product comes in a simple, easy-to-pour bottle. The concentrate is thick but mixes readily. One drawback is the limited grass compatibility: it is only safe for St. Augustine and Centipede. Using it on Bermuda, Zoysia, or other warm-season grasses can cause damage. Also, precision in mixing and application is key - too much can stress the lawn, and too little may not control tough weeds.

On the downside, some users find that stubborn weeds require a second application. The product's effectiveness depends on proper timing (early spring or fall) and following the label. It also has a strong chemical odor during application, so gloves and basic precautions are recommended.

Overall, the Hi-Yield Atrazine Weed Killer is a solid choice for anyone with St. Augustine or Centipede grass who wants to tackle broadleaf weeds without resorting to non-selective herbicides. It delivers on its promises when used correctly, making it a worthwhile addition to your lawn care routine.