Best Weed And Seed For St Augustine

Best Weed And Feed For St Augustine Grass: St. Augustine is a turfgrass that can create a lush green lawn especially in warmer coastal areas suc… A thriving and green lawn is a perfect complement for any home . But a lot goes into making it so . For instance, the best weed and feed for St Augustine grass would turn your yard into a paradise. The best weed and feed for St. Augustine grass lawns is Scotts Southern Tripple Action Turf Builder. Alternative products you can also use are Spectracide Weed and Feed, Pennington Ultragreen Southern Weed and Feed and Ferti-Lome Weed and Feed. I’ve reviewed them below in detail.

8 Best Weed And Feed For St Augustine Grass In Florida 2022

Best Weed And Feed For St Augustine Grass: St. Augustine is a turfgrass that can create a lush green lawn, especially in warmer coastal areas such as Florida and the Carolinas as well as Southern California. However, it needs some amount of care which is one of the crucial factors to keep in mind when it comes to managing the St Augustine lawn is fertilization.

The fertilizers for feed and weeds don’t just provide fertilization but also weed killers. It’s 2 for the cost (and time) that of just one.

8 Best Weed And Feed For St Augustine Grass In 2022

Table of Contents

Here are the top 8 herbicides and fertilizers specifically designed to maintain St Augustine lawns.

Scotts Snap Pac Weed and Feed – 12.8 lb, Builds Strong, Deep Roots, Kills Dandelions, White Clover, Chickweed, Ragweed and More, Covers up to 4,000 sq. ft.

BioAdvanced 3 in 1 Weed and Feed and Feed for Southern 5M Lawn Fertilizer with Herbicide, 12.5 lb, Granules

Scotts Turf Builder Southern Triple Action – Kills Dollarweed and Clover, Prevents and Kills Fire Ants, Feeds and Strengthens Lawns – Covers up to 4,000 sq. ft.

1. Pennington Ultragreen Southern Weed And Feed

The best products for special needs are usually superior to general products for lawn maintenance. This is particularly relevant when dealing with St. Augustine grass, which requires a different type of care and doesn’t work with other popular products.

Pennington’s southern blend contains 22.1 per cent nitrogen in the slow-release form. This is quite high for products for weeds and feeds as well as helps to control the growth of weeds for three months. It is a summer weed as well as feed, it’s perfect to control weeds once they grow on lawns with established turf which is why it’s great to maintain your grass cover.

Why We Like It

  • Provides excellent Summer control
  • It is possible to put off applying it until you’re sure that you’ll require it.
  • It contains iron to fortify lawns

Our Verdict

Overall, it’s an excellent product and should be starting your search for a feed and weed. The iron enrichment is a wonderful feature for lawns, but the summer application means you could want to buy and make use of it even if purchase a different fertilizer for the spring. Many stores sell it at a very competitive price as well, which makes it easier to be incorporated into a typical budget for garden maintenance.

Editor’s Rating: 5/5

2. Sunniland St. Augustine Weed And Feed

In many ways, it’s the opposite of our first selection. Sunniland’s mix can be used in all seasons other than the summer months and has a slow-release mix that can control the plants up to 90 days in a stretch. It is also free of Phosphates, which is more suitable for waterways in the local area and is one of the reasons why we chose to position it on the top of this list.

The product is focused exclusively on St. Augustine almost to the exclusion of other grasses. If you’re planning to seed it, you’ll have to wait 8 weeks which is fairly long but not the most difficult we’ve ever seen in the past for planting.

  • A special design specifically made specifically for St. Augustine grass
  • Useful throughout the year.
  • There aren’t any Phosphates

Our Verdict

This is a fantastic product in general and a great complement to our number one selection. If you are looking to fertilize your lawn throughout the year These two products give you the coverage and control lawns require.

The only issue with the product would be that manufacturers typically offer it only in bags that measure 5,000 square feet which means you’ll have to purchase multiple bags to cover a larger space.

Editor’s Rating: 5/5

3. Sta-Green Weed and Feed

Sta-Green’s Weed & Feed blend is among the most versatile and multi-functional products available that can be used on almost any type of grass, while also offering excellent pest control. Apart from helping to eliminate more than 250 kinds of weeds which are one of the most you’ll see in a weed-feed product, it can also help to protect against the more severe winter weather.

But, this power isn’t without a disadvantage. It’s winterized which helps prepare St. Augustine grass for spring growth, but it’s not very effective when you apply it beyond the autumn. This makes it an inferior option to control weeds during St. Augustine’s growth season, nevertheless, it’s a great product to help strengthen your lawn.

  • Competitive pricing
  • Supports deep root systems
  • Are things different in Summer and Spring? fertilizers aren’t

Our Verdict

This product for weeds and feed is the best choice when you need to build and maintain your lawn. It’s not as effective for lawns that are fully established however, you might want to apply it if you experience harsh winters and wish to safeguard your lawn to the greatest extent possible.

Editor’s Rating: 4.5/5

4. Scotts Snap Pac Weed and Feed

Scotts is among the most well-known manufacturers and their track record shows through their options such as their feed and weed Snap Pac. This is a brand new product created for Scotts its exclusive Snap Spreader System. You’ll have to purchase that separately if you intend to utilize this fertilizer, however, since Snap Pacs can automatically adjust the spreader to the correct setting this removes the confusion and adjustments from the procedure.

Each bag can cover four thousand square feet of grass. That may be a bit lower than average and is one reason why this product is not on our list.

  • It is easy to use using the correct spreader
  • Effective in both the Spring and Autumn.
  • Perfect for people who aren’t experienced with fertilization

Our Verdict

It is worth noting that the Snap Pac is more expensive than the other options for feed and weed control that we have reviewed, however its outstanding weed control capabilities and simplicity of use place it in a league that is its own. If you’ve got a smaller lawn and would like to reduce the frequency of fertilization This is a great product, to begin with.

Our Verdict: 4/5

5. BioAdvanced 3 in 1 Weed and Feed for Southern Lawns

BioAdvanced does not have a lot of products to choose from however their three-in-one blend is a great choice for feeding St. Augustine lawns while managing various weeds, including crabgrass. The time frame for fertilizer application is a bit short with only two months however, the weed control can last for as long as 6 months. This is great when your lawn is established.

It is important to only purchase your Southern Lawns bag. BioAdvanced has several similar products, but they aren’t suitable to be used on St. Augustine grass and can cause harm to your lawn if you make use of these products.

Why We Like It

  • Highly efficient formula
  • More protection for weeds overtime over competitors
  • Content of high nitrogen

Our Verdict

This is among the most effective alternatives for feeding and weed control to use on St. Augustine lawns. Its cost is in the middle of the weed and feed options with its high-efficiency formula work well in removing the growth of weeds. We suggest this product when your soil is generally well-groomed, yet you require to manage weeds for a long period, to ensure that your lawn will develop better.

It’s most effective during the summer and spring So, you should consider a winterizer such as our top choice, #3 from Sta-Green.

Editor’s Rating: 4.5/5

6. Scotts Turf Builder Southern Triple Action

Scotts was likely to make it included on this list at minimum twice, regardless of what we tried however, the Southern Triple Action bag is worthy of consideration for anyone looking to purchase. It is not only effective in killing all kinds of weeds in addition to providing nutrients to St. Augustine lawns, this mix additionally helps to keep common pests such as grasshoppers, fire ants, ticks and fleas from settling in the region.

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The protection against insects is long-lasting also and the protection lasts for six months if this product is used correctly. Some fertilizers do not stop insect pests, therefore if insects are an issue in your region you should consider this product first.

What We Like

  • Long-term effectiveness
  • Allows multiple treatments if needed.
  • Minimal waiting time if planting seeds

Our Verdict

The ability to kill insects is the main selling point of this weed as well as feed. It’s an uncommon quality and was an important factor in our choice to include this product in our list of recommendations. Scotts sells this product in four thousand and eight hundred square feet that are different from what is standard in the market but is still suitable for the majority of homeowners.

Southern Triple Action Southern Triple Action formula is higher priced than the majority of alternatives However, if you’re using it to improve the quality of your lawn and stop insect infestations, we believe it’s well worth the cost.

Editor’s Rating: 4.5/5

7. Spectracide Weed & Feed

Its Weed & Feed is a low-cost liquid that requires a hose as well as the ability to walk at a consistent speed. Each bottle can treat up to 7500 sq ft of lawn, but the actual amount varies depending on the speed at which you walk. This blend concentrates on controlling broadleaf weeds, and might not be as effective against other types of pests and harmful plants.

  • Easy to use
  • It covers a vast area for the cost
  • Ideal for supporting lawns with established borders.

Our Verdict

Feed and weed options are the most effective to provide long-term stability that lawns in the process of growing need. Liquid fertilizers such as this are used to maintain lawns that don’t need more external support. That’s why we aren’t able to recommend it to anyone despite its price and user-friendly.

If, however, your lawn requires only some care to remain well-groomed, liquid fertilizers like these are some of the top alternatives available.

Editor’s Rating: 4.5/5

8. Sta-Green Ready-to-Spray Weed and Feed

Another liquid fertilizer, Sta-Green’s formula can be used for nearly all types of grass and has 20% nitrogen, which is excellent for control of weeds. Similar to other liquid products they cover around 7,500 square feet. It is extremely simple to use as it is the hose that is long enough to cover the entire garden.

Sta-Green suggests using this product anytime the weeds are in full bloom. However, they recommend applying a heavy watering regimen for 1 to 2 days before applying the product, which will require more planning than much other weed and feed products.

  • Extremely simple to make use of
  • Ideal for southern grasses like St. Augustine
  • Effective on most broadleaf weeds

Our Verdict

It’s a great alternative to liquid fertilizer that’s somewhat more expensive than the one we recommended previously. At only 20 minutes per bottle, it’s an efficient and simple method to feed lawns when required. We see this as an aid rather than an all-purpose weed and feed mix. It is better suited for lawns that are established as opposed to those still growing.

But be aware that this mix does not include any Potassium or Iron in it. If you need to adjust your soil to a greater extent then you can consider using a different herbicide and feeding instead of this one.

Editor’s Rating: 4.5/5

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How Aggressive Should I Be About Weeding And Feeding St. Augustine?

Short answer: Read the directions.

In general, you’ll need to apply weeds and feed in the springtime, especially when it’s the use of a pre-emergent herbicide. Pre-emergents stop weeds from growing thus, even though they will take charge of an abundance of weeds, they will not assist with the winter weeds already in the area. If it’s a herbicide that is post-emergent it is recommended to fertilize your garden in the late spring or throughout the entire year according to the climate of your area.

How Aggressive Should I Be About Weeding And Feeding St. Augustine?

You must be very assertive when St. Augustine is building its sod layer. Removing weeds to their roots will allow St. Augustine to build the strongest possible defence for it. After it’s established, it will require maintenance but not as often.

Fertilizer is among the things that more is not necessarily better. If you apply too much of it, you might notice the lawn turning yellow which is usually caused by nitrogen burn.

What’s St Augustine grass?

St. Augustine is a grass that grows in warm weather commonly used to create lawns as well as pastures and other vast areas. While it is a strong fan of warm climates and is found throughout the southern part of the United States, it can be tolerant of colder coastal areas that experience mild winters.

St. Augustine grass is extremely valuable due to its thick sod, which assists in eliminating the other grasses and weeds that give an even appearance. However, getting the grass up to this level requires care and attention during its initial growth stages, and after that owners can shift to maintaining the grass. Although St Augustine is most common in states such as Florida It can be grown in a variety of southern climates, assuming that the soil type is appropriate.

It thrives in soil that has a pH between 5 to 8.5 Which is more than most of its rivals. If you’re planning to grow St. Augustine, be sure to examine the soil of the area you live in to determine if the grass is a good match for your soil. You may need to alter the soil before adding grass.

St Augustine grass lawns are extremely lush. They require regular cutting (never cutting more than 1/3 of the length of the blade) using razor-sharpened blades .

The place where is St Augustine grass-grown?

If you own a St. Augustine grass lawn there’s likely a possibility that you live in Florida which is the ideal environment that is ideal for St Augustine. However, the grass is a great choice for the coastal Carolinas and the Gulf Coast and southern California. It’s anywhere that’s warm all year and has water nearby.

Are you interested in learning more? St Augustine Services?

A healthy lawn with beautiful green colours isn’t easy, and the methods applied depend on the type of grass. For more information regarding St Augustine’s care, we suggest the following video by Franklin Hernandez.

Can you feed St. Augustine with Scotts weed?

For example, Scotts Turf Builder Feed and Weed should not be mixed with St. Augustine grass even though the Turf Maker with Halts Crabgrass Preventer can be used safely.

Is atrazine found in Scotts weed or Feed?

It contains an herbicide called atrazine . This herbicide is toxic and should not be used around shrubs or trees.

How often should your lawn be weeded and fed?

Do not apply weed or feed products more often than once a year . It’s okay to apply another spring application if your spring application has not resolved your weed problem. Two months should be allowed between applications.

What time should I apply weedkiller to my lawn?

Gardeners should apply weed killer in the spring to get the best results. To combat invasive weeds such as crabgrass, gardeners usually reapply the herbicide eight weeks after the initial spray.

Top Pick

This Pennington Ultragreen Southern Weed and Feed mix is a suitable option to use for St. Augustine lawns. You can put off using it until you are sure that you will need it every year. Additionally, the iron can be a great way to enrich your lawn as well as establish sod.

Premium Choice

Scotts Turf Builder Southern Triple Action formula is quite expensive, however, its insect repellent properties are not common in the world of weeds and feed and are worth the cost if you want to safeguard your home from invasion. It is recommended to hire an expert to determine which pests are threatening your home before purchasing any feed or weed.

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Great Value

Its Sta-Green Ready-to-Spray Weed and Fertilize is affordable, even for an extremely tight budget for gardening. Although it’s not as efficient as other solid fertilizers, however, it’s a great option for maintaining St. Augustine lawns that already have their sod layer completely installed.

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Finding The Best Feed And Weed For St Augustine Grass

St Augustine grass is perfect when you want to make your lawn look good. However sometimes, no matter how much we’ve been fertilizing it, the lawn still doesn’t look as green as we originally wanted. Don’t worry we’ve all been there, and as someone who overcame this issue, we’re certain that this problem stems from the fact that your grass simply needs some extra care.

So to shed more light on this issue, we’ve decided to share our knowledge with you, and help you pick the best weed and feed for St Augustine grass. All to ensure you have a thriving lawn!

Top 7 Best Feed And Weed Products For St Augustine Grass: Comparison Chart

Type Area Covered Target Pests Primary Nutrients (N-P-K) Weight
Scotts Turf Builder Southern Triple Action Granular 4000 sq. ft. Dollarweed, clover, oxalis, plantain, chickweed, henbit and others 29-0-10 13.32 pounds
Spectracide 96262 Liquid 7500 sq. ft. Major broadleaf weeds 20-0-0 32 oz
Sunniland 128820 Granular 5000 sq. ft. n/a 20-0-6 20 pounds
Fertilome Granular 2500 sq. ft. Crabgrass, sedge, paspalum, spotted spurge and others 15-0-4 16 pounds
BioAdvanced 704840B Granular 5000 sq. ft. Broad lead, grassy weeds, crabgrass 35-0-3 12.5 pounds
GreenView 2131251 Granular 5000 sq. ft. Crabgrass 26-0-4 13.5 pounds
The Andersons Granular 16000 sq. ft. Over 250 weeds 16-0-9 40 pounds

Saint Augustine Grass: Definition and Where to Grow It

St Augustine grass is a warm-season grass cluster that can be grown on the lawn or for pasture, in large farms. It has a thick sod, which helps it eliminate grasses and weeds to create a grass colony where it grows. People use weed and feed for St Augustine grass alongside the traditional care and maintenance practice.

St Augustine grass does well in warm areas like the Southern parts of the United States but can tolerate colder coastal regions with mild winters. However, according to a lot of st Augustine grass reviews, it can also do well in any southern climate, with the right soil.

And speaking of it, the grass does well in soil with a pH of 5 and 8.5, which is a broad range for many growers. So before growing the grass, it’s best to test your pH and adjust it where necessary.

Choosing the Best Feed and Weed for St Augustine Grass

When you want to choose the best fertilizer for St Augustine grass you have to keep in mind several important factors. So let’s take a look at the essentials of the St Augustine fertilizer:

Quick-release vs Slow-release?

Slow-release fertilizers are insoluble, while quick release fertilizers are soluble. Quick-release fertilizers give results within two weeks, and slow-release fertilizers take up to ten weeks to give results.

Slow-release fertilizers make the best weed & feed for St Augustine grass. They are gentle on the lawn and do not burn it out even at high temperatures. They are less labor-intensive as the next application can only be in 8 or 10 weeks.

Slow-release fertilizers are slightly expensive than fast-release fertilizers. When used as a St Augustine weed and feed, they bolster fast growth on your grass and help it overcome weed as well as protect it from diseases typical of poor nutrition.

Granular vs Liquid

St Augustine weed and feed products come in two types; liquid and granular. Liquid fertilizers are more convenient for a small lawn since they can be connected to your house and easily spread across the yard.

Liquid weed and feed fertilizers enhance the soil and detoxify it from impurities and harmful agents, making it great for growth. Using liquid weed and feed for St Augustine lawns will decrease the soil compaction and improve the drainage of the soil, making your St Augustine grass flourish.

Granular fertilizers are suitable for mid-size and large lawns as the spreader will be easier to push around to ensure it is spread easily and efficiently. It doesn’t require much mixing, but you should read through the instructions to ensure the spreader has the right measure. This way, you get all the benefits from the best weed and feed for st Augustine grass 2021.

Another important thing to point out is that granular fertilizers are the best weed and feed for St Augustine grass in Florida and other high-temperature areas. That is because they do not collect on the blade of the grass; hence will not burn it.

Content Ratio

All the fertilizers must have the content ratio on the packaging. Usually, you can find a label with letters like N-P-K, which means Nitrogen, Phosphorus, and Potassium. 10-4-10 indicates the percentage: 10% Nitrogen, 4% Phosphorus, and 10% Potassium. The content ratio is per 100 pounds of fertilizer alone unless indicated otherwise in the packaging.

Overall, the best fertilizer for St Augustine grass should have less phosphorus and potassium but enough nitrogen.

Hacks for Fertilizers for St Augustine Grass

  • Make sure your soil’s PH levels are good: As mentioned, they should be from 5 and 8.5. Once the nutrients in your soil are fine, you can choose the best weed and feed for Saint Augustine grass.
  • It is best to start fertilizing your grass during the spring and fall seasons: That is because the St. Augustine grass is most active during these seasons.
  • Protect your grass from trampling: St Augustine grass does best in areas with less traffic. Otherwise, make sure to separate pathways for people and animals or put a fence to keep away animals that might ruin your turf.
  • Control the grass growth using a lawnmower: The best height setting for St Augustine grass is anywhere between 2.5-3 inches. This ensures the grass gets abundant nutrients and nourishment for growth.
  • Use herbicides to control weeds: In as much as fertilizers can control weed in St. Augustine grass, they are not very efficient with pre-grown weed.

St Augustine Grass Fertilizer FAQs

To better understand the best weed and feed for St Augustine grass, you need to know the answers to some of the most common, but important questions:

What Quantities of Weed and Feed Are Perfect for St Augustine Grass?

St Augustine grass weed and feed fertilizer require that you apply the correct amount of fertilizer. Too little, and you end up with a nutrient-deficient lawn. On the other hand, too much of it creates a suitable environment for pests to thrive.

What Is the Best Way to Apply Weed and Feed on St Augustine Grass?

UUse a spreader to apply weed and feed on your grass. The ideal St Augustine weed and feed spreader for a small lawn is a chest-mounted spreader. Ensure the fertilizer does not cling to the blade of the grass to avoid burning.

How Best Can I Take Care of My St Augustine Grass?

For a lush green lawn, you have to apply the right amounts of St Augustine fertilizer, mow correctly and use the right methods to control pests and disease. It would be best if you did proper scouting on a fertilizer before you buy and apply it to ensure it is correctly formulated for your lawn.

If there is a lot of weeds on the new grass, and they can’t be controlled by herbicides – use slow-release fertilizers. They can control weed AND enhance the growth of your grass. Just remember that Broadleaf fertilizers will harm St Augustine grass, so make sure to avoid them.

And to determine the correct amount of weed and feed for St Augustine grass, divide the first number indicated on your fertilizer’s label by 100. This gives you the weight you need to apply over a 1,000 sq. ft area for it to be within the recommended ratio of 1 pound per 1,000 sq. ft of St. Augustine grass weed and feed.

Final Thoughts

When you have applied the right weed and feed for St Augustine grass, your yard would look just like one of those great southern lawns. And what’s great is that it’s not that hard to get the best weed and feed for St Augustine grass 2021. As long as you keep in mind all the essential factors, you will find the best fertilizer in no time! So good luck, and feel free to let us know if you have any more questions!

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Best Weed and Feed for St. Augustine Grass

When choosing weed-and-feed products for your lawn, you’ve got to be careful as some herbicide additives can have side effects on different turfgrasses. I always want to check the active ingredient and the NPK ratio to make sure they’re safe and appropriate for St. Augustine grass and the type of weeds I’m targeting.

The best weed and feed for St. Augustine grass lawns is Scotts Southern Tripple Action Turf Builder. Alternative products you can also use are Spectracide Weed and Feed, Pennington Ultragreen Southern Weed and Feed, and Ferti-Lome Weed and Feed. I’ve reviewed them below in detail.

Best Weed and Feed for St. Augustine Grass

Weed and feed products comprise mineral ingredients that add nutrients to the soil as well as systemic or contact herbicides that kill weeds on your lawn. They’re available in either granular or liquid form.

  • It`s 29:0:10 NPK fertilizer.
  • An insecticide.
  • Kills dandelions, chickweed, and dollarweed.
  • 15:0:4 NPK fertilizer
  • Contains zinc and iron.
  • Controls crabgrass, sedge, spotted spurge.
  • 2, 4-D dimethylamine salt.
  • Dichlorprop-p dimethylamine salt.
  • Mecoprop-p dimethylamine salt.
  • It`s a 20:0:6 NPK fertilizer.
  • Kills a wide range of weeds like crabgrass and spurge.
  • 34:0:4 NPK fertilizer
  • Kills henbit and clover in lawns
  • Has 5% iron that makes grass greener
  • Kills 200+ broadleaf weeds.
  • Fast action in 2 days.
  • Systemically kills weeds to the root.
  • Kills up to 250 weeds.
  • Safe for St. Augustine grass.
  • 26:0:12 NPK fertilizer.

The best weed and feed products for St. Augustine lawns are those that effectively get rid of weeds while simultaneously boosting St. Augustine turf growth.

Below, we detail some of the best weed and feed products, factoring in various benefits like the versatility of use, affordability, NPK ratio, and potency.

1. Scotts Southern Triple Action Turf Builder

  • It is a 29:0:10 NPK fertilizer.
  • It acts as an insecticide for your lawn.
  • Kills dandelions, chickweed, and dollarweed.

Scotts Tripple Action weed and feed contains Atrazine, a herbicide that effectively gets rid of stubborn turf weeds like dandelions, dollarweed, and chickweed. It also infuses your lawn with nutrients that boost the turf’s capacity to withstand heat and drought.

Scott’s Turf Builder Southern Triple Action weed and feed is a 3-in-1 product that also contains Bifenthrin, an insecticide that kills common St. Augustine lawn pests like fire ants and chinch bugs. I found that it is best applied on St. Augustine grass after the third mowing of the growing season and shouldn’t be used during winter dormancy.

2. Ferti-Lome St. Augustine Weed and Feed

  • 15:0:4 NPK fertilizer
  • Controls crabgrass, sedge, spotted spurge, etc. in lawns
  • Contains zinc and iron that green up your lawn.

Ferti-Lome St. Augustine Weed and Feed are specially formulated to get rid of common St. Augustine lawn weeds like Paspalum and Crabgrass. It works well as both a pre-emergent and post-emergent herbicide. This herbicide-cum-fertilizer has a 15:0:4 NPK ratio.

Ferti-Lome comprises 0.79% Atrazine, a potent herbicide that effectively kills several types of warm-season turf grass weeds. This weed and feed product is also laden with micro-nutrients like iron, zinc, and boron.

Take note though, that Ferti-Lome St. Augustine Weed and Feed is only half as powerful as Scott’s Southern Triple Action Turf Builder.

3. Spectracide Weed and Feed

Spectracide Weed and Feed is a ready-to-spray lawn treatment with an NPK ratio of 20:0:0. It consists of the following active ingredients:

  • 2, 4-D dimethylamine salt- an auxin-type herbicide that effectively eradicates broadleaf weeds without affecting St. Augustine grass.
  • Dichlorprop-p dimethylamine salt- a post-emergence herbicide that’s effective in controlling brush weeds like dandelion and clover.
  • Mecoprop-p dimethylamine salt- a common broadleaf weed controller.

Depending on how healthy your St. Augustine lawn is, it may take a repeat application to completely get rid of clover and dandelion weeds from your lawn using Spectracide Weed and Feed.

You may also have to be patient, as the product may take up to four weeks to fully get rid of weeds, factoring in the turf conditions.

4. Sunniland St. Augustine Weed and Feed

It is a 20:0:6 NPK fertilizer

Sunniland St. Augustine Weed and Feed is an excellent choice for St. Augustine turfs because it can be applied both in the spring and in the fall. With an NPK ratio of 20:0:6, this weed and feed formulation for St. Augustine grass infuses lawn soil with ample amounts of nitrogen and potassium nutrients to spur healthy turf growth and disease resistance.

From my own use, I found that Sunniland Weed and Feed is unbeatable as a weed killer, as it effectively gets rid of a wide range of weeds like crabgrass and spurge.

Note that it Sunniland Weed and Feed for St. Augustine grass has no phosphorus, which means it may not be very suitable for a newly established lawn as a root-boosting fertilizer. I’d advise you to choose a high phosphorus content fertilizer for your turf after sodding such as Milorganite (6:4:0 NPK) or its alternatives.

5. Pennington Ultragreen Southern Weed and Feed

  • 34:0:4 NPK fertilizer
  • Kills henbit and clover in lawns
  • Has 5% iron that makes grass greener

Pennington Ultragreen Southern Weed and Feed’s biggest selling point is that it’s both a quick-release and slow-release fertilizer. The fast-acting nitrogen will turn your St. Augustine turf into a lush green and dense lawn within a short period while the slow-release nitrogen ensures the turf stays fed for up to three months.

List of weeds it controls: henbit, clover, and chickweed.

Pennington Ultragreen Southern Weed and Feed is best applied during summer when St. Augustine is actively growing. You may, however, need to reapply it after a month if the weed problem on your St. Augustine lawn is severe.

6. Southern AG, 2, 4-D Amine Weed Killer

2, 4-D Amine Weed Killer by Southern Agricultural Insecticides is an effective herbicide against most broad leaf lawn weeds including poison ivy, clover, and dandelions. It contains other active ingredients that stimulate the growth of St. Augustine grass.

2, 4-D Amine Weed Killer is one of the most economical weed and feed products out there, with 1-4 pints being enough to cover up to an acre of St. Augustine turf.

What I found from my tests is that this Southern AG formulation is rather at eradicating oxalis weeds as they regenerate quickly via underground rhizomes.

7. Sta-Green Weed and Feed

  • Kills up to 250 weeds
  • Safe for St. Augustine grass
  • 26:0:12 NPK fertilizer

Of all the weed control + fertilizer product on the market right now, Sta-Green Weed and Feed is arguably the most potent, as it can kill up to 250 different types of weeds. This product also works well on a wide variety of turfs, including St. Augustine lawns. When applied during the fall, it will protect your St. Augustine tough against extreme winter weather.

Sta-Green weed and Feed has an NPK ratio of 26:0:12, with the high potassium content ensuring your turf can effectively withstand diseases and dry weather. The only drawback against this product is that it’s ineffective when applied during the spring or the summer, which is St. Augustine’s active growing season.

Note: Weed and feed granules are tiny, herbicide-coated fertilizer pellets that stick onto weeds when applied on a wet lawn. Liquid weed and feed is usually diluted before being sprayed over dry or damp grass. These formulations promote a healthy, weed-free turf resulting in a thick St. Augustine grass lawn.

St. Augustine weed and feed schedule

The best time of the year to apply weed and feed product blends on St. Augustine lawns is during the growing season (spring-summer) when the grass is actively growing and the weeds are still young. You can also apply weed and feed that contains pre-emergent herbicides early in the spring before the weeds sprout.

Meanwhile, to ensure proper fertilizer timing (usually three weeks after the turf greens up), use a weed and feed that contains slow-release nitrogen. This type of weed and feed will still be releasing nitrogen into the soil for up to three months after it was originally applied as a weed killer.

Note: Some weed and feed products, like Sta-Green Weed and Feed are not meant to be applied during the spring or the summer.