The Texas sun is already beating down on your lawn by 9:00 AM, and your St. Augustine is starting to look a bit thirsty and thin. You stand there with a spreader in one hand and a bag of granules in the other, hoping to green up those yellowing patches before the summer heat really settles in.
Choosing the Best Fertilizers for St Augustine Grass in Texas requires a solid grasp of your soil needs. These grasses are picky eaters that respond best to specific nutrient ratios and timing. Let us walk through the top options to keep your yard thick and healthy throughout the year.
Key Takeaways
- Prioritize products containing Atrazine if you are currently battling broadleaf weeds alongside your fertilizing schedule.
- Pay close attention to the NPK ratio, as St. Augustine generally prefers higher nitrogen content to encourage lateral growth.
- Choose liquid fertilizers if you need a rapid green up, but stick to granular formulas for long term, steady nutrient release.
- Always check the bag or bottle to ensure the formula is labeled as safe for warm season grasses to prevent accidental chemical burn.
- Consider your total square footage carefully to avoid buying too little, as applying the correct coverage rate is vital for consistent results.
| Best All-Rounder |  |
Sunniland St. Augustine Weed and Feed | Dual action formula | Protects St. Augustine turf | Covers large areas | View on Amazon | Read Review |
| Rapid Green Booster |  |
St. Augustine Liquid Lawn Food | Encourages rapid growth | Promotes deep color | Supports new runners | View on Amazon | Read Review |
| Spot Treatment Specialist |  |
Scotts EZ Patch Lawn Repair | Includes mulch base | Simplifies spot repairs | Retains moisture well | View on Amazon | Read Review |
| Professional Strength Choice |  |
SeedRanch St. Augustine Fertilizer | Large capacity bag | Nitrogen heavy formula | Ideal for large lawns | View on Amazon | Read Review |
| Pre-emergent Defense |  |
Fertilome St. Augustine Weed and Feed | Prevents future weeds | Kills existing invaders | Safe for St. Augustine | View on Amazon | Read Review |
| Versatile Feeding Option |  |
Advanced Balanced Liquid Fertilizer | Balanced nutrient profile | Easy to apply | Fast uptake | View on Amazon | Read Review |
| Standard Season Support |  |
Scotts Turf Builder Lawn Food | Consistent growth results | Easy to find | Reliable performance | View on Amazon | Read Review |
| Phosphorus Free Powerhouse |  |
Sunniland Slow Release Fertilizer | Phosphorus free formula | Extended feeding time | Prevents surge growth | View on Amazon | Read Review |
| Pest Protection Essential |  |
Scotts SummerGuard Insect Control | Two in one solution | Controls lawn insects | Promotes healthy growth | View on Amazon | Read Review |
| Iron Rich Supplement |  |
Scotts Liquid Green Max | Rapid color improvement | Contains iron supplement | Fast acting liquid | View on Amazon | Read Review |
More Details on Our Top Picks
-
Sunniland St. Augustine Weed and Feed
This is the go-to choice for homeowners who want to handle weed control and fertilization in one pass. It provides essential nutrients while targeting common invaders that steal energy from your turf.
Because it is formulated specifically for St. Augustine, you can apply it with confidence knowing it won't burn your grass when used correctly. Just keep in mind that you need to watch your application timing to ensure the weed control component works effectively.
- Brand Name:Sunniland
- Product Type:Weed and Feed
- Coverage Area:5000 sq ft
- Formulation:Granular
- Target Use:Weed control and feeding
- Additional Feature:Targeted nutrient delivery
- Additional Feature:Efficient lawn maintenance
- Additional Feature:Easy spreader application
-
St. Augustine Liquid Lawn Food
If your lawn looks a bit tired, this liquid feed acts like a quick energy shot to help the grass recover. It is designed to stimulate new runners, which is perfect for filling in thin patches across your yard.
Liquid applications are great for faster absorption because the nutrients go straight to the foliage and root zone. Do not expect this to replace your heavy granular seasonal feedings, as it functions better as a supplemental pick-me-up.
- Brand Name:St. Augustine
- Product Type:Liquid Fertilizer
- Formulation:Liquid
- Target Use:Growth and color
- Additional Feature:Fast acting formula
- Additional Feature:Supports root health
- Additional Feature:Simple spray application
-
Scotts EZ Patch Lawn Repair
Sometimes you have small, stubborn bare spots that just won't grow back. This mix includes a blend of mulch and fertilizer to hold moisture while providing the nutrients needed for recovery.
It is specifically designed for smaller areas rather than your whole lawn. Think of it as a first aid kit for those high traffic zones that take a beating during the summer.
- Brand Name:Scotts
- Product Type:Repair Mix
- Coverage Area:170 sq ft
- Formulation:Granular mulch blend
- Target Use:Patching bare spots
- Additional Feature:Easy to spread
- Additional Feature:Built in nutrients
- Additional Feature:Moisture retention
-
SeedRanch St. Augustine Fertilizer
When you have a large property to manage, this bag offers the bulk quantity you need to cover significant ground. The nutrient ratio is tailored to the specific needs of St. Augustine, providing plenty of nitrogen for leafy growth.
This is a heavy duty option that demands a proper spreader to ensure even distribution. Since the bag is quite large, ensure you have a dry place to store the remainder for your next application.
- Brand Name:SeedRanch
- Product Type:Lawn Fertilizer
- Nutrient Ratio:24-2-11
- Formulation:Granular
- Target Use:General maintenance
- Additional Feature:High nutrient content
- Additional Feature:Commercial grade sizing
- Additional Feature:Consistent release
-
Fertilome St. Augustine Weed and Feed
This product stands out because it contains Atrazine, which is effective at stopping weeds before they become a problem. It works as both a pre-emergent and post-emergent solution for your grass.
It is a specialized tool that keeps your lawn clean while providing a gentle nitrogen boost. Use this carefully, as the chemical components are potent and must be applied at the recommended rate to avoid stressing the grass.
- Brand Name:Fertilome
- Product Type:Weed and Feed
- Nutrient Ratio:15-0-4
- Formulation:Granular
- Target Use:Weed management
- Additional Feature:Contains Atrazine
- Additional Feature:Broad spectrum control
- Additional Feature:Reliable lawn protection
-
Advanced Balanced Liquid Fertilizer
If you want a product that works on various grass types, this balanced liquid feed is a solid performer. It delivers a steady supply of nutrients that help keep your turf resilient against heat.
Liquid formulas are incredibly easy to handle for those who prefer spraying over spreading. Just remember that liquid nutrients wash through the soil faster, so you may need to apply it more frequently to maintain results.
- Brand Name:Simple Lawn Solutions
- Product Type:Liquid Fertilizer
- Nutrient Ratio:16-4-8
- Formulation:Liquid
- Target Use:General feeding
- Additional Feature:Highly versatile
- Additional Feature:Concentrated formula
- Additional Feature:Quick absorption
-
Scotts Turf Builder Lawn Food
This is the classic choice for a reliable lawn feeding throughout the growing season. It provides a steady release of nutrients that ensures your grass stays healthy without requiring constant reapplication.
It is essentially a workhorse for maintaining a steady green color in your yard. While it does not kill weeds, it does an excellent job of thickening the grass so that weeds have less room to take hold.
- Brand Name:Scotts
- Product Type:Lawn Fertilizer
- Coverage Area:5000 sq ft
- Formulation:Granular
- Target Use:General feeding
- Additional Feature:All season use
- Additional Feature:Trusted formulation
- Additional Feature:Wide compatibility
-
Sunniland Slow Release Fertilizer
This fertilizer focuses on slow release nitrogen to feed your lawn over an extended period. Because it is phosphorus free, it is a great choice if your soil already has high levels of that nutrient.
The slow release nature means you get consistent growth without the sudden, fleeting bursts that require frequent mowing. It is a smart approach for long term lawn health in the Texas heat.
- Brand Name:Sunniland
- Product Type:Lawn Fertilizer
- Nutrient Ratio:20-0-6
- Coverage Area:5000 sq ft
- Formulation:Granular
- Target Use:Slow release feeding
- Additional Feature:Environmentally conscious
- Additional Feature:Long lasting nutrition
- Additional Feature:Steady turf development
-
Scotts SummerGuard Insect Control
Summer in Texas often brings unwanted insect guests, and this product serves a double purpose of feeding the lawn while stopping pests. It protects your grass from damage caused by common summer bugs.
Having an insect killer integrated into your fertilization routine saves you from needing to walk the yard twice. Always check the label to ensure it targets the specific insects plaguing your neighborhood.
- Brand Name:Scotts
- Product Type:Fertilizer and Insecticide
- Coverage Area:5000 sq ft
- Formulation:Granular
- Target Use:Pest and lawn care
- Additional Feature:Targeted insect control
- Additional Feature:Seasonal lawn support
- Additional Feature:Simplifies yard maintenance
-
Scotts Liquid Green Max
When your grass is struggling to look vibrant, this liquid supplement provides a heavy dose of iron for deep color. It is not a heavy nitrogen feed, so it acts more like a cosmetic boost for your turf.
You will see results in just a few days, making it perfect for quick lawn improvements before a backyard gathering. Keep it away from concrete or pavers, as the iron content can leave rust colored stains on those surfaces.
- Brand Name:Scotts
- Product Type:Liquid Supplement
- Nutrient Ratio:2-0-0
- Formulation:Liquid
- Target Use:Color enhancement
- Additional Feature:Vibrant green results
- Additional Feature:Quick visibility
- Additional Feature:Easy sprayer bottle
Frequently Asked Questions
How often should I fertilize my St. Augustine lawn in Texas?
You should aim for about four to five applications per year during the active growing season. Starting in late spring and ending in early autumn keeps the grass fed without pushing growth too late into the year.
Will fertilizer kill my weeds?
Most standard fertilizers only feed the grass and do not contain herbicides. If you have weeds, look for a "weed and feed" product, but be careful because these can damage sensitive ornamentals or trees in your lawn.
Can I over-fertilize St. Augustine grass?
Yes, applying too much fertilizer, especially nitrogen, can cause lawn burn or make the grass susceptible to diseases like gray leaf spot. Always follow the manufacturer's application rate on the bag, and remember that more is rarely better.
Should I water after applying fertilizer?
You must water the lawn lightly after applying granular fertilizer to wash the nutrients off the blades and into the soil. This prevents the granules from scorching the grass leaves and ensures the nutrients reach the root zone where they are needed.
Why is my grass yellow even after I fertilized it?
Yellowing often happens because the soil pH is too high, which locks out essential nutrients like iron. Check your soil pH, or apply a foliar iron supplement to see if the green color improves within a few days.
