10 Best Fertilizers for St Augustine Grass in 2026

For the best results with St. Augustine grass in 2026, choose from the 10 best fertilizers for St. Augustine grass to ensure healthy growth and vibrant color. Options like SeedRanch 24-2-11 work well for large lawns, while Superior 15-0-15 liquid provides quick, even coverage.

Look for balanced formulas that include iron to boost greening and consider phosphorus-free options for eco-friendly lawn care. Whether you prefer granular or liquid fertilizers, apply them during cooler months and always water afterward to maximize effectiveness.

If you want strong roots, vibrant color, and improved drought resistance, keep exploring top fertilizer choices and application tips tailored just for your lawn’s unique needs.

St Augustine Grass Fertilizer Liquid Lawn Food 32oz

Give your St. Augustine grass the care it truly deserves with the St. Augustine Grass Fertilizer Liquid Lawn Food 32oz. This specially formulated liquid feeds your lawn quickly, helping to solve common problems like thinning, dull color, and weak root systems. With fast nutrient absorption, it supports a thicker, greener lawn that stands up better to heat and foot traffic.

Designed specifically for St. Augustine grass, this fertilizer promotes deep root growth and improves overall lawn resilience. Its liquid form ensures even application, so every inch of your turf receives the nutrients it needs. This helps maintain a vibrant, healthy lawn throughout warm seasons with minimal effort.

Maintenance is simple—just apply as directed to keep your lawn nourished and strong. The 32-ounce bottle size is perfect for regular feedings on small to medium-sized lawns. While it may require multiple bottles for larger areas, its concentrated formula makes feeding efficient and effective.

Manufactured in the USA by TPS Nutrients, this product combines quality and convenience. It’s an ideal solution for homeowners wanting to enhance their lawn’s appearance and durability without complicated treatments or long wait times.

Best for: Homeowners and gardeners seeking a targeted, fast-acting fertilizer to improve St. Augustine grass health and appearance in warm climates.

What We Like:

• Rapid nutrient delivery for quick visible results
• Formulated to strengthen roots and increase heat tolerance
• Easy, even application with liquid design
• Supports lawn resilience against heavy foot traffic

Specification:

Feature	Details
Manufacturer	TPS Nutrients
Volume	32 oz (946 ml)
Intended Use	St. Augustine grass
Form	Liquid
Made in	USA

Scotts Turf Builder Lawn Fertilizer 12.5 lb

Scotts Turf Builder Lawn Fertilizer 12.5 lb is designed to tackle common lawn care challenges and promote a healthier, greener yard. It strengthens St Augustine grass by feeding it essential nutrients that help build deep, robust roots. This improves your lawn’s ability to absorb water and nutrients, reducing stress during dry conditions.

The powder formula is pesticide-free, making it safe for families and pets. You can apply it on both wet or dry lawns during spring, summer, or fall, giving you flexibility in your lawn maintenance routine. Using Scotts spreaders with the recommended settings ensures even application for the best results.

After spreading, lightly watering the lawn helps the fertilizer penetrate the soil faster, encouraging quicker growth. Covering up to 5,000 sq. ft., this product is ideal for small to medium-sized lawns and supports year-round lawn health. However, larger areas may require multiple bags.

With its targeted functionality and safe design, this fertilizer helps prevent future lawn problems by maintaining strong root systems. It’s an effective tool for gardeners focused on nurturing vibrant, lush grass without harsh chemicals.

Best for: Homeowners and gardeners seeking a pesticide-free lawn fertilizer that promotes deep root growth and supports healthy lawns up to 5,000 sq. ft.

What We Like:

• Builds strong roots for better water and nutrient uptake
• Safe, pesticide-free formula suitable for family environments
• Can be applied on wet or dry lawns across multiple seasons
• Compatible with Scotts spreaders for precise application
• Supports overall lawn resilience and health

Specification:

Feature	Details
Manufacturer	Scotts
Weight	12.5 lb (5.67 kg)
Coverage Area	Up to 5,000 sq. ft.
Formula Type	Powder, pesticide-free
Suitable For	St Augustine and various grass types

Advanced 16-4-8 Liquid Lawn Fertilizer (32 oz)

Advanced 16-4-8 Liquid Lawn Fertilizer delivers a fast and balanced nutrient boost to help your lawn thrive. Designed for St. Augustine grass, it addresses common issues like dull color and weak roots by providing essential nitrogen, phosphorus, and potassium. This formula supports a greener, healthier lawn while enhancing drought resistance through steady nutrient absorption.

The liquid concentrate is easy to use—simply mix 3-5 ounces per gallon of water and apply with a spray. Proper watering after application is crucial to maximize nutrient uptake and promote strong growth. Its quick action helps maintain vibrant color and root vitality during the demanding spring and summer months.

Enriched with natural seaweed and fish emulsion, this fertilizer improves soil health while feeding your lawn. It’s an ideal choice for homeowners and commercial users seeking a reliable and efficient solution without complicated application methods. The product’s concentrated design ensures you get more coverage from a single 32-ounce bottle.

Made in the USA by a family-owned company with 25 years of turf industry experience, this fertilizer combines proven expertise with quality ingredients. While it works well for general lawn care, it may require additional products to address specific nutrient deficiencies or preferences for granular forms.

Best for: Homeowners and commercial users wanting a fast-acting, balanced liquid fertilizer to enhance St. Augustine and other common grasses’ color, root strength, and drought tolerance.

What We Like:

• Balanced 16-4-8 formula enriched with seaweed and fish emulsion
• Convenient liquid concentrate for easy spray application
• Supports soil health and drought resistance naturally
• Trusted family-owned brand with extensive turf expertise

Specification:

Specification	Details
Manufacturer	Family-owned US company
Volume	32 oz (946 ml)
N-P-K Ratio	16-4-8
Application Method	Liquid concentrate, spray
Intended Grass Types	St. Augustine and common grasses

Pennington Full Season Lawn Fertilizer 32-0-5 4M 11.2lb

Pennington Full Season Lawn Fertilizer 32-0-5 offers a simple, effective solution for maintaining a healthy lawn with just one application. Designed to feed your St Augustine grass consistently, it delivers nutrients gradually over four months. This slow-release formula reduces the need for frequent fertilizing, saving time and effort while promoting steady growth.

The fertilizer contains 5% iron, which helps enhance the green color and vitality of your turf. It also includes beneficial microorganisms that support soil health, improving the lawn’s resilience and overall condition. This combination ensures your grass receives balanced nutrition and care throughout the growing season.

For best results, mow and water your lawn 1-2 days before applying the fertilizer. Avoid applying before heavy rain to prevent nutrient runoff. Each 11.2-pound bag covers up to 4,000 square feet, making it ideal for small to medium-sized lawns. Its single-season formula simplifies lawn care routines for homeowners looking to maintain lush, thick grass with minimal hassle.

While effective, this product is not suitable for use in Hawaii or South Dakota due to regional restrictions. Proper application timing is important to maximize its benefits and avoid environmental impact.

Best for: Homeowners seeking an easy, one-application-per-season fertilizer specifically formulated for St Augustine grass and similar turf varieties.

What We Like:

• Slow, steady nitrogen release supports consistent lawn feeding
• Contains 5% iron for enhanced greening
• Includes beneficial microorganisms to improve soil health
• Covers up to 4,000 sq. ft. per bag for convenient application

Specification:

Attribute	Details
Manufacturer	Pennington
Weight	11.2 lb (5.08 kg)
Coverage Area	Up to 4,000 sq. ft.
Nutrient Ratio	32-0-5
Iron Content	5%

SeedRanch St. Augustine Lawn 24-2-11 Fertilizer – 50 Lbs.

SeedRanch St. Augustine Lawn 24-2-11 Fertilizer is designed to bring out the best in your St. Augustine grass. If your lawn struggles to maintain a rich green color, this fertilizer delivers the essential nutrients needed for vibrant growth. Its unique formula includes 6% iron, which enhances greening power, especially in cooler weather when lawns often look dull.

This granular fertilizer covers up to 12,000 square feet, making it ideal for larger St. Augustine lawns. Its professional-grade design ensures nutrients are released effectively to jump-start healthy turf in the spring. The 50-pound bag offers enough product for thorough coverage while remaining manageable for application.

SeedRanch’s formula is tailored specifically for St. Augustine grass, helping you avoid the guesswork involved in general lawn care products. It supports steady growth and encourages a lush, dense lawn. For best results, apply during the cooler months of spring when your grass is primed to absorb nutrients.

While the 50-pound weight may be a consideration for some users, the ease of application and targeted benefits make it a practical choice. Follow label instructions carefully to maintain your lawn’s health and vibrancy throughout the growing season.

Best for: homeowners and landscapers aiming to improve the color and health of St. Augustine grass, especially during cooler spring temperatures.

What We Like:

• Contains 6% iron to promote rich green color
• Covers up to 12,000 square feet for large lawns
• Granular form allows precise application
• Specialized formula tailored for St. Augustine grass

Specification:

Feature	Details
Manufacturer	SeedRanch
Weight	50 lb (22.7 kg)
Coverage Area	Up to 12,000 sq. ft.
N-P-K Ratio	24-2-11
Iron Content	6%

Southern Ag All Purpose Granular Fertilizer 10-10-10, 5 LB Size: 5 LB

Southern Ag’s 10-10-10 granular fertilizer offers a simple solution for gardeners seeking balanced nutrition for their plants. This formula delivers equal parts nitrogen, phosphorus, and potassium, helping to promote healthy growth and vibrant color in a variety of plants. It is especially effective for St Augustine grass, roses, shrubs, and vegetable gardens.

The granular design allows easy application by broadcasting evenly across the soil. Watering after application activates the nutrients, ensuring they reach plant roots efficiently. Applying about 1 cup per 25 square feet provides consistent feeding for most lawns, supporting steady development without overloading the soil.

This fertilizer’s balanced nutrient profile addresses common issues like uneven growth and lackluster foliage. Its 5-pound size is convenient for small to medium gardens, though larger areas may require multiple containers. The straightforward maintenance routine makes it a practical choice for gardeners wanting reliable results without complex procedures.

Southern Ag’s product stands out by combining ease of use with dependable performance. While it requires manual spreading and watering in, it avoids the mess and complexity of liquid fertilizers. This makes it a versatile option for those who prefer granular feeding methods for diverse garden needs.

Best for: Gardeners and homeowners needing a balanced, easy-to-apply granular fertilizer for lawns, roses, shrubs, and vegetable gardens.

What We Like:

• Balanced 10-10-10 nutrient ratio supports overall plant health
• Suitable for a wide range of plants including grass and vegetables
• Easy to apply with simple broadcasting and watering
• Compact 5-pound size ideal for small to medium gardens

Specification:

Feature	Details
Manufacturer	Southern Ag
Weight	5 lb (2.27 kg)
Nutrient Ratio	10-10-10 (N-P-K)
Application	Granular, broadcast
Suitable Plants	Lawns, roses, shrubs, vegetables

St. Augustine Lawn Fertilizer 15-0-4 Iron (2 Pack)

St. Augustine Lawn Fertilizer 15-0-4 Iron (2 Pack) is designed to bring out the best in your St. Augustine grass. If you struggle with dull, patchy lawns, this fertilizer helps restore vibrant, healthy turf quickly and effectively. It delivers essential nutrients that your lawn needs for strong growth and rich color.

Each 25.6-pound bag covers approximately 4,000 square feet, so the two-pack treats up to 8,000 square feet. This makes it ideal for small to medium residential lawns. The granular form allows for precise application, ensuring even nutrient distribution and consistent results.

This formula is phosphorus-free, which supports eco-friendly lawn care practices and is perfect for warm-season grasses like St. Augustine. Added iron deepens the green shade, improving your lawn’s visual appeal without extra chemicals. Maintaining your lawn with this fertilizer means less worry about uneven growth or color fading.

While it is tailored specifically for St. Augustine grass, it may not suit other grass types or large commercial areas. Proper spreading is necessary for the best effect, but the benefits in turf health and appearance make it a solid choice for homeowners focused on lawn quality.

Best for: Homeowners with small to medium St. Augustine lawns seeking a phosphorus-free fertilizer that promotes lush, green growth.

What We Like:

• Covers up to 8,000 sq. ft. with two bags, perfect for residential use
• Contains added iron for a richer, deeper green lawn
• Phosphorus-free formula supports environmentally safe lawn care
• Granular design allows for even nutrient application

Specification:

Feature	Details
Manufacturer	Fertilome
Coverage	4,000 sq. ft. per bag
Weight	25.6 lb per bag
Total Weight	51.2 lb (2-pack)
Nutrient Ratio	15-0-4 (N-P-K) + Iron
Suitable Grass	St. Augustine

Superior 15-0-15 Liquid Lawn Fertilizer with Sprayer

Experience effortless lawn care with the Superior 15-0-15 Liquid Lawn Fertilizer, designed to deliver quick nutrient absorption for a vibrant, healthy lawn. Its easy-to-use hose-end sprayer allows precise application, covering up to 3,200 square feet, ensuring your St. Augustine grass receives even feeding and optimal growth.

This fertilizer’s balanced 15-0-15 formula focuses on nitrogen to promote lush greening and potassium to enhance stress resistance. Enriched with humic acids and seaweed extracts, it supports soil health and boosts nutrient uptake. Being phosphate-free, it aligns with eco-conscious lawn care practices and suits use across all seasons.

Maintenance is simple but important; watering your lawn after application helps maximize nutrient absorption, promoting a stronger, more resilient turf. While each bottle covers moderate lawn sizes, larger areas may require multiple applications to maintain consistent results.

Made in the USA by a trusted family business, this product combines quality ingredients with reliable customer support. It’s designed for homeowners and lawn enthusiasts who want a straightforward, efficient solution to keep their lawns green and healthy year-round.

Best for: homeowners and lawn care enthusiasts seeking a quick, easy-to-apply liquid fertilizer that promotes healthy greening and stress resistance across a variety of grass types.

What We Like:

• Convenient hose-end sprayer for even application over 3,200 sq. ft.
• Balanced 15-0-15 formula enriched with humic acids and seaweed extracts
• Phosphate-free and suitable for use in all seasons
• Supports soil health and improves nutrient absorption

Specification:

Feature	Details
Manufacturer	Superior
Coverage Area	Up to 3,200 sq. ft.
Formula	15-0-15 (N-P-K)
Additional Nutrients	Humic acids, seaweed extracts
Application Method	Hose-end sprayer
Origin	Made in the USA

Scotts Turf Builder SummerGuard Lawn Food 5,000 sq.ft

Scotts Turf Builder SummerGuard Lawn Food offers a practical solution for maintaining a healthy lawn while managing pest problems. Specifically formulated for summer use, it protects your grass from heat and drought stress, keeping it vibrant during the hottest months. This product is designed to work effectively on St Augustine grass and similar types, strengthening your lawn’s natural defenses.

The granules work by targeting common pests like ants, armyworms, and chinch bugs, helping to reduce damage without harsh chemicals. Applying it to a dry lawn ensures the best results, and spreading it evenly with a lawn spreader promotes uniform protection and feeding. With a balanced 20-0-8 nutrient formula, it nourishes your grass without risking burn when used as directed.

Maintaining your lawn with SummerGuard means you support its natural resilience while controlling pests that can cause significant damage. However, it requires a dry application and a waiting period of at least one week before using other lawn treatments. Its coverage of 5,000 sq.ft suits medium-sized lawns but may need multiple bags for larger areas.

By combining pest control and fertilization in one product, Scotts Turf Builder SummerGuard simplifies summer lawn care. It helps you achieve a stronger, healthier lawn ready to withstand environmental stresses and pest pressures.

Best for: Homeowners with St Augustine or similar grasses seeking summer lawn fertilizer with integrated pest protection and drought resistance.

What We Like:

• Strengthens grass to resist heat and drought stress
• Controls a variety of common lawn pests effectively
• Safe 20-0-8 formula minimizes risk of lawn burn
• Easy application with spreader on dry lawns
• Supports environmental health by enhancing natural lawn resilience

Specification:

Feature	Details
Manufacturer	Scotts
Coverage Area	5,000 sq.ft
Nutrient Ratio	20-0-8
Grass Type	St Augustine and similar
Application	Dry lawn, spreader needed

Scotts Liquid Green Max Lawn Fertilizer 32 oz

Scotts Liquid Green Max Lawn Fertilizer is designed to deliver fast, visible results for anyone looking to revive their lawn quickly. This liquid formula works within three days to produce a rich, deep green color that enhances your outdoor space. Its nitrogen-rich blend, combined with iron, not only brightens your grass but also strengthens the turf, helping it withstand everyday stress.

Applying the fertilizer is simple and efficient. The reusable applicator attaches directly to your garden hose, allowing you to cover up to 2,000 sq. ft. in about 10 minutes. The translucent bottle lets you monitor the amount used, ensuring precise application without waste. This design also supports easy maintenance and refills, reducing plastic waste and making the process eco-friendlier.

Ideal for all grass types, this product waters and feeds your lawn simultaneously. It supports turf resilience against heat, drought, and foot traffic, promoting a healthier, more robust lawn. While it’s perfect for small to medium yards, larger areas may require multiple bottles. Keep in mind, a hose connection is necessary for use, which might not suit every setup.

Best for: homeowners and gardeners seeking fast, visible lawn greening with a convenient, hose-connected application for areas up to 2,000 sq. ft.

What We Like:

• Quick greening visible in under three days
• Reusable applicator reduces plastic waste
• Translucent bottle ensures precise application
• Suitable for all grass types
• Combines feeding and watering in one step

Specification:

Manufacturer	Scotts
Volume	32 oz
Coverage	Up to 2,000 sq. ft.
Formula	29-0-0 (Nitrogen-rich with iron)
Application	Hose-connected liquid spray
Bottle Type	Translucent, reusable applicator

Factors to Consider When Choosing Fertilizer for St Augustine Grass

When choosing fertilizer for your St Augustine grass, you’ll want to focus on the nutrient composition to meet your lawn’s specific needs. Consider how you’ll apply it, the best timing for each season, and the coverage area you need to treat.

Also, make sure the fertilizer matches your grass type to get the best results.

Nutrient Composition Importance

Choosing the right nutrient composition is essential for nurturing vibrant St. Augustine grass. You’ll want a fertilizer with a higher nitrogen content because nitrogen fuels lush, green growth and keeps your turf vigorous. Since phosphorus is less important for established lawns, you can minimize or skip it, especially if you’re in an area sensitive to runoff.

Don’t overlook potassium—it boosts drought tolerance, disease resistance, and overall resilience, which helps your grass thrive under stress. Including organic matter and micronutrients like iron can further enhance turf color and strength, particularly if your soil lacks nutrients.

Application Method Options

Although selecting the right fertilizer formula is essential, you also need to take into account how you’ll apply it to your St. Augustine grass. You can choose liquid, granular, or spray methods, each with unique benefits.

Liquid fertilizers absorb quickly, perfect for fast greening and stress recovery, and you can easily apply them with hose-end sprayers. Granular fertilizers spread evenly and release nutrients slowly once watered, offering longer-lasting feeding. Spray or liquid applications let you target specific lawn areas precisely and work well on both wet and dry grass.

When deciding, consider your lawn size, how fast you want results, and convenience. Smaller lawns might benefit from liquid spraying, while larger areas often suit granular spreading for steady nourishment. Choose the method that fits your needs best.

Seasonal Timing Benefits

Applying fertilizer at the right time of year can make a big difference in how well your St. Augustine grass thrives. When you fertilize in spring, you support vigorous growth and help the lawn bounce back from winter dormancy. Summer applications encourage deep root development, which strengthens your grass against heat stress.

In fall, feeding your lawn prepares it for winter by boosting resilience and promoting a healthy root system. By aligning fertilizer timing with these seasonal growth patterns, you guarantee your grass absorbs nutrients effectively.

This strategic approach keeps your lawn healthy, vibrant, and better equipped to handle environmental challenges throughout the year. Paying attention to seasonal timing maximizes your fertilizer’s benefits and helps maintain a lush, green St. Augustine lawn.

Coverage Area Needs

One of the key factors to contemplate when selecting fertilizer for your St. Augustine grass is coverage area needs. Start by determining your lawn’s total square footage so you can pick a fertilizer that covers the entire area without wasting product. Matching the fertilizer’s coverage to your lawn size ensures even nutrient distribution, preventing over-application that can harm your grass.

If you have a large lawn, choose fertilizers with a bigger coverage per bag to cut down on the number of applications. For smaller lawns, concentrated or high-efficiency fertilizers often prove more cost-effective since you’ll need less product. Always check the coverage area listed on the packaging to confirm it fits your lawn’s size.

This simple step helps you achieve best results without overspending or damaging your St. Augustine grass.

Grass Type Compatibility

Choosing the right fertilizer for your St. Augustine grass means selecting one specifically formulated for this turf type. Different grasses have unique nutrient needs, so using a fertilizer designed for St. Augustine guarantees ideal growth and health. Look for balanced nutrient ratios like 16-4-8 or 15-0-4, which support strong root development and vibrant green blades.

Including iron is important, as it enhances the rich color that St. Augustine lawns are known for. Also, consider the fertilizer’s application method—whether liquid, granular, or slow-release—to match your lawn’s maintenance routine and growing conditions. Avoid fertilizers high in phosphorus unless specifically recommended, since St. Augustine grass requires minimal phosphorus to thrive, helping you maintain a lush, healthy lawn.

Environmental Impact Considerations

While selecting a fertilizer tailored to St. Augustine grass, you should consider its environmental impact. Choosing organic fertilizers with natural ingredients like fish emulsion and seaweed helps reduce chemical runoff while promoting healthier soil ecosystems. Opting for phosphate-free options prevents water pollution by minimizing nutrient leaching into nearby waterways, protecting aquatic life.

Slow-release nitrogen formulations further reduce the risk of runoff and contamination. Applying fertilizers at the right times and in proper amounts also plays a key role in preventing excess nutrients from causing algal blooms and water quality problems.

Frequently Asked Questions

How Often Should I Water St Augustine Grass After Fertilizing?

You should water your St. Augustine grass lightly right after fertilizing to help nutrients absorb.

Then, keep watering deeply about twice a week, adjusting based on weather, to maintain healthy, lush growth without overwatering.

Can I Apply Fertilizer to St Augustine Grass During Winter?

You shouldn’t apply fertilizer during winter; you shouldn’t waste nutrients, and you shouldn’t risk lawn damage.

Instead, wait for warmer weather when your St. Augustine grass actively grows, so fertilizer can nourish and strengthen it effectively.

What Is the Best Time of Day to Fertilize St Augustine Grass?

You should fertilize St. Augustine grass early in the morning or late afternoon to avoid the midday heat. This helps the fertilizer absorb better and prevents burning.

Avoid fertilizing during the hottest part of the day.

Are Organic Fertilizers Effective for St Augustine Grass?

Yes, organic fertilizers are effective for St. Augustine grass. They improve soil health and provide slow-release nutrients, helping your lawn grow strong and green over time.

Organic fertilizers do this without the risk of burning or chemical buildup, making them a safer choice for maintaining a healthy lawn.

How Do I Prevent Fertilizer Burn on St Augustine Grass?

Imagine your grass sizzling under the sun—avoid fertilizer burn by applying in cool, moist conditions. Don’t overfeed; follow package instructions carefully, water deeply after applying, and spread evenly to keep your St. Augustine lush and healthy.

Conclusion

Choosing the right fertilizer for your St. Augustine grass is like painting a vibrant green canvas that thrives under your care. With the right blend, you’ll see lush blades waving in the breeze, turning your lawn into a soft, inviting carpet.

Whether you prefer liquid or granular, fast or slow-release, these top fertilizers will help your grass soak up nutrients and shine. Get ready to enjoy a healthy, radiant lawn that’s the envy of your neighborhood!

By selecting from the best fertilizers for St. Augustine grass in 2026, you ensure your lawn receives the essential nutrients it needs. This will promote strong growth, vibrant color, and overall lawn health all season long.