7 Best Fertilizers for Saint Augustine Grass in 2026 (Buyer’s Guide)

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Thoms
Written By Thomas James

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Do you want your Saint Augustine grass to thrive, grow thicker, and maintain a rich green color all year round? If so, finding the right fertilizer is crucial. With so many fertilizers available in the market, it can be challenging to determine which one is the best fit for your needs. The key to achieving a lush and healthy lawn is to provide your Saint Augustine grass with the essential nutrients it needs to grow and maintain its appearance. I've compiled a list of the best fertilizers for Saint Augustine grass, each designed to promote healthy growth, root development, and a vibrant green color.

Key Takeaways

  • When shopping for a fertilizer, consider the type of grass you have, as some fertilizers are specifically designed for Saint Augustine grass.
  • Look for a fertilizer with a balanced NPK ratio, which will provide your grass with the necessary nutrients for growth.
  • Choose a fertilizer that is easy to apply, whether it's a liquid or granular formula.
  • Consider the size of your lawn, as some fertilizers may only cover a certain square footage.
  • Check if the fertilizer contains any additives, such as weed preventers or soil conditioners.

Our Top Best Fertilizers For San Augustine Grass Picks

St. Augustine's Best Friend Sunniland Weed & Feed Fertilizer Sunniland Weed & Feed Fertilizer Easy to spread granules 2 applications for consistent results Covers 5,000 sq ft View on Amazon Read Review
Deep Green Machine Liquid Lawn Food for St. Augustine Liquid Lawn Food for St. Augustine Easy mix and feed formula High nitrogen formula Fast-absorbing liquid formula View on Amazon Read Review
All-Grass Solution Advanced Lawn Liquid Fertilizer Advanced Lawn Liquid Fertilizer Complete NPK lawn food Nourishes all grass types Easy-to-use design View on Amazon Read Review
St. Augustine's Slow Feeder Sunniland Slow Release Fertilizer Sunniland Slow Release Fertilizer 20-0-6 nutrient formula Slow release nitrogen Covers 5,000 sq ft View on Amazon Read Review
Iron-Rich Fertilizer SeedRanch St. Augustine Fertilizer SeedRanch St. Augustine Fertilizer 24-2-11 nutrient formula Includes 6% iron Covers 12,000 sq ft View on Amazon Read Review
Lawn Food Master Scotts Turf Builder Fertilizer Scotts Turf Builder Fertilizer Balanced NPK ratio Covers 5,000 sq ft Easy-to-use design View on Amazon Read Review
Lawn Repair Specialist Scotts EZ Patch Fertilizer Scotts EZ Patch Fertilizer Absorbent mulch technology Controlled release fertilizer Easy three-step application View on Amazon Read Review

More Details on Our Top Picks

  1. Sunniland Weed & Feed Fertilizer

    Sunniland Weed & Feed Fertilizer

    St. Augustine's Best Friend

    View on Amazon

    For homeowners with St. Augustine grass, Sunniland's Weed & Feed Fertilizer is a must-have. Its easy-to-spread granules make it simple to cover your lawn, and the 2-application schedule ensures consistent results. This fertilizer is perfect for those looking for a straightforward solution to promote healthy growth and weed control. One notable strength is its ability to tackle weeds and fertilize in one go, saving you time and effort. Another advantage is its coverage of 5,000 sq ft, making it suitable for larger lawns. However, this product may not be the best choice for those with sensitive skin, as the granules can be a bit irritating to handle.

    • Brand:Sunniland
    • Type:Granular
    • Size/Capacity:5000 sq ft
    • Material:Unknown
    • Balanced NPK Ratio:Unknown
    • Coverage Area:5000 sq ft
    • Additional Feature:Weed control
    • Additional Feature:Fertilizer
  2. Liquid Lawn Food for St. Augustine

    Liquid Lawn Food for St. Augustine

    Deep Green Machine

    View on Amazon

    For those seeking a liquid fertilizer that delivers fast results, St. Augustine Grass Fertilizer is a top choice. Its easy mix and feed formula makes it simple to apply, and the high nitrogen formula promotes thick, green growth. This product is perfect for those with St. Augustine grass looking to enhance their lawn's appearance. One notable strength is its ability to boost rich color and promote strong roots. Another advantage is its fast-absorbing liquid formula, which delivers nutrients efficiently. However, this product may not be suitable for large lawns, as the 8 oz bottle may not provide enough coverage.

    • Brand:Unknown
    • Type:Liquid
    • Size/Capacity:8 oz
    • Material:Unknown
    • Balanced NPK Ratio:Unknown
    • Coverage Area:Unknown
    • Additional Feature:Promotes thick, green growth
    • Additional Feature:Supports strong roots
  3. Advanced Lawn Liquid Fertilizer

    Advanced Lawn Liquid Fertilizer

    All-Grass Solution

    View on Amazon

    For homeowners with multiple types of grass, Advanced 16-4-8 is a versatile fertilizer that nourishes all grass types. Its complete NPK lawn food formula provides essential nutrients for healthy growth and development. This product is perfect for those looking for a fertilizer that can be used on various grass types. One notable strength is its ability to promote greening and growth while providing nutrients for lush lawns. Another advantage is its easy-to-use design, making it simple to apply. However, this product may not be the best choice for those with sensitive skin, as the liquid formula can be a bit irritating.

    • Brand:Simple Lawn Solutions
    • Type:Liquid
    • Size/Capacity:32 oz
    • Material:Unknown
    • Balanced NPK Ratio:16-4-8
    • Coverage Area:Unknown
    • Additional Feature:Promotes greening and growth
    • Additional Feature:Provides nutrients for lush lawns
  4. Sunniland Slow Release Fertilizer

    Sunniland Slow Release Fertilizer

    St. Augustine's Slow Feeder

    View on Amazon

    For homeowners with St. Augustine grass, Sunniland's Slow Release Fertilizer is a great choice for consistent feeding. Its 20-0-6 nutrient formula provides essential nitrogen and potassium for healthy growth and development. This product is perfect for those looking for a fertilizer that can be applied less frequently. One notable strength is its ability to promote strong turf development while maintaining lawn health. Another advantage is its slow release nitrogen, which provides steady nutrient availability over time. However, this product may not be the best choice for those with large lawns, as the 5,000 sq ft coverage may not be sufficient.

    • Brand:Sunniland
    • Type:Granular
    • Size/Capacity:20 lb
    • Material:Unknown
    • Balanced NPK Ratio:20-0-6
    • Coverage Area:5,000 sq ft
    • Additional Feature:Promotes strong turf development
    • Additional Feature:Maintains lawn health
  5. SeedRanch St. Augustine Fertilizer

    SeedRanch St. Augustine Fertilizer

    Iron-Rich Fertilizer

    View on Amazon

    For homeowners with St. Augustine grass, SeedRanch's Fertilizer is a great choice for promoting green growth. Its 24-2-11 nutrient formula provides essential nutrients for healthy growth and development. This product is perfect for those looking for a fertilizer that can be used on St. Augustine lawns. One notable strength is its ability to include 6% iron, which promotes excellent greening. Another advantage is its 12,000 sq ft coverage, making it suitable for larger lawns. However, this product may not be the best choice for those with sensitive skin, as the granules can be a bit irritating to handle.

    • Brand:SeedRanch
    • Type:Granular
    • Size/Capacity:50 lb
    • Material:Unknown
    • Balanced NPK Ratio:24-2-11
    • Coverage Area:12,000 sq ft
    • Additional Feature:Promotes excellent greening
    • Additional Feature:Suitable for larger lawns
  6. Scotts Turf Builder Fertilizer

    Scotts Turf Builder Fertilizer

    Lawn Food Master

    View on Amazon

    For homeowners with various types of grass, Scotts Turf Builder Fertilizer is a versatile fertilizer that promotes healthy growth. Its balanced NPK ratio provides essential nutrients for healthy growth and development. This product is perfect for those looking for a fertilizer that can be used on various grass types. One notable strength is its ability to cover 5,000 sq ft, making it suitable for larger lawns. Another advantage is its easy-to-use design, making it simple to apply. However, this product may not be the best choice for those with sensitive skin, as the granules can be a bit irritating.

    • Brand:Scotts
    • Type:Granular
    • Size/Capacity:12.5 lb
    • Material:Unknown
    • Balanced NPK Ratio:Unknown
    • Coverage Area:5,000 sq ft
    • Additional Feature:Promotes healthy growth
    • Additional Feature:Suitable for various grass types
  7. Scotts EZ Patch Fertilizer

    Scotts EZ Patch Fertilizer

    Lawn Repair Specialist

    View on Amazon

    For homeowners with bare or thin lawn areas, Scotts EZ Patch Fertilizer is a great choice for repairing and establishing St. Augustine grass. Its absorbent mulch technology provides a moisture-retaining layer for optimal growth. This product is perfect for those looking for a fertilizer that can be used on St. Augustine lawns for repair and establishment. One notable strength is its ability to include a controlled release fertilizer, which feeds lawn areas while grass establishes. Another advantage is its easy three-step application, making it simple to use. However, this product may not be the best choice for those with large lawns, as the 170 sq ft coverage may not be sufficient.

    • Brand:Scotts
    • Type:Mulch and Fertilizer
    • Size/Capacity:3.75 lb
    • Material:Unknown
    • Balanced NPK Ratio:Unknown
    • Coverage Area:170 sq ft
    • Additional Feature:Promotes repair and establishment
    • Additional Feature:Suitable for St. Augustine lawns

Factors to Consider When Choosing Best Fertilizers For San Augustine Grass

Material Composition

The material composition of your San Augustine grass fertilizer is crucial to its effectiveness and safety. Some fertilizers are made from organic materials, while others are synthetic. Organic fertilizers tend to be more environmentally friendly, but they may not provide the same level of nutrients as synthetic options. When choosing a fertilizer, consider the composition of the material and whether it aligns with your lawn care goals. Organic fertilizers often contain natural ingredients like fish bone meal, bone meal, or alfalfa meal. These materials release nutrients slowly, promoting healthy grass growth over time. On the other hand, synthetic fertilizers contain chemical compounds that provide a quick boost to your lawn. However, overuse of synthetic fertilizers can lead to soil imbalances and negatively impact the environment.

Sizing and Packaging

When it comes to fertilizer, the sizing and packaging can be just as important as the material composition. A larger container may seem like a better value, but it can also be more expensive and take up more space. Consider the size of your lawn and the frequency of your fertilization schedule when choosing a fertilizer package. Look for fertilizers that come in convenient packaging, such as bags or buckets with easy-to-use measuring scoops. This can save you time and reduce waste. Additionally, consider the concentration of the fertilizer and whether it is suitable for your lawn's needs.

Key Specs and Nutrient Balance

Every fertilizer has a unique blend of nutrients, and understanding these key specs is essential to choosing the right product. Look for fertilizers that contain a balanced mix of nitrogen, phosphorus, and potassium (NPK). This will help promote healthy grass growth and prevent overfertilization. When shopping for a fertilizer, check the label for the NPK ratio. A balanced fertilizer might have an NPK ratio of 10-10-10, while a fertilizer with a higher nitrogen content might have an NPK ratio of 20-5-5. Consider the specific needs of your lawn and choose a fertilizer that meets those needs.

Safety Precautions

When working with fertilizers, safety precautions are essential to avoid accidents and protect the environment. Always read the label carefully and follow the instructions for application and handling. Wear protective clothing, including gloves and eyewear, when applying fertilizer to your lawn. Avoid applying fertilizer during windy or rainy conditions, as this can lead to overspray and environmental damage. Additionally, keep fertilizers out of reach of children and pets to prevent accidental ingestion.

Price Ranges

Fertilizers can vary significantly in price, depending on the material composition, sizing, and key specs. When choosing a fertilizer, consider your budget and the value you're getting for your money. Look for fertilizers that offer good value for the price. A more expensive fertilizer may not always be the best choice, especially if it contains unnecessary ingredients or has a low concentration of nutrients. Consider the long-term benefits of a fertilizer and whether it will provide a return on investment for your lawn care efforts.

Compatibility and Compatibility with Lawn Care Practices

When choosing a fertilizer, consider whether it is compatible with your existing lawn care practices. Some fertilizers may not be suitable for lawns with certain conditions, such as soil type or pest infestations. Look for fertilizers that are specifically designed for San Augustine grass and are compatible with your lawn care practices. Consider the type of soil you have and whether the fertilizer is formulated to address any specific soil-related issues. Additionally, consider whether the fertilizer is safe to use with other lawn care products and whether it will interfere with any existing treatments.

Frequently Asked Questions

What is the best time to fertilize St. Augustine grass in my area?

When it comes to fertilizing St. Augustine grass, timing is everything. In warmer climates, you can fertilize your lawn during the spring and summer months when it's actively growing. In cooler climates, you can fertilize during the fall and early spring. You'll want to apply a balanced fertilizer that contains nitrogen, phosphorus, and potassium (NPK) in a ratio of 10-10-10 or 20-5-10. This will provide your lawn with the necessary nutrients to grow and thrive. Apply the fertilizer once a month during the growing season, but avoid applying it during the hottest summer months when the grass is under stress.

Are slow-release fertilizers better for St. Augustine grass?

Slow-release fertilizers can be beneficial for St. Augustine grass because they provide a steady supply of nutrients over a longer period of time. This can help reduce the need for frequent fertilization applications. Slow-release fertilizers work by releasing the nutrients slowly as they break down. They can be especially helpful during periods of drought or high temperatures when the grass is under stress. Some popular slow-release fertilizers for St. Augustine grass include Scotts Osmocote and Espoma Organic Fertilizer. These products can be applied in the spring and summer months to promote healthy growth and green color.

Can I use organic fertilizers on my St. Augustine grass?

Yes, you can use organic fertilizers on your St. Augustine grass. Organic fertilizers are made from natural ingredients such as bone meal, blood meal, and fish emulsion. These products are a good option if you're looking for a more environmentally friendly way to fertilize your lawn. However, keep in mind that they may not provide as quick of a response as synthetic fertilizers. Some popular organic fertilizers for St. Augustine grass include Espoma Organic Fertilizer and E.B. Stone Organics Bloom! 5-3-4. These products can be applied in the spring and summer months to promote healthy growth and blooming.

How do I choose the right fertilizer for my St. Augustine grass?

When choosing a fertilizer for your St. Augustine grass, consider the following factors: soil type, climate, and grass growth stage. If you have clay soil, look for a fertilizer that contains sulfur to help reduce soil pH. If you live in a warm climate, look for a fertilizer that contains manganese to help prevent yellowing. Also, consider the growth stage of your grass. If it's actively growing, look for a fertilizer that contains nitrogen to promote healthy growth. Some popular fertilizers for St. Augustine grass include Scotts Turf Builder and Miracle-Gro Lawn Food. These products can be applied in the spring and summer months to promote healthy growth and green color.

Can I overfertilize my St. Augustine grass?

Yes, it's possible to overfertilize your St. Augustine grass. Overfertilization can lead to burning of the grass, particularly if you apply too much nitrogen. When applying fertilizer, be sure to follow the instructions on the label and take note of the recommended application rates. Also, avoid applying fertilizer during periods of high temperatures or drought. If you suspect that you've overfertilized your lawn, don't panic! Simply water the lawn thoroughly and wait for the grass to recover.

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