Many homeowners assume that a lush lawn requires an expensive, complicated feeding schedule. You might be surprised to learn that St. Augustine grass is actually quite resilient if you feed it exactly what it craves.
Choosing the Best Fertilizers for St Augustine is simply a matter of aligning your specific goals with the right soil nutrients. Let us clarify which products perform best so you can stop guessing and start growing.
Key Takeaways
- Check the N-P-K ratio on the label to ensure the nitrogen content matches your lawn's current growth stage.
- Select liquid formulas if you need rapid absorption to green up your grass quickly.
- Granular options provide a slower release of nutrients, which sustains your lawn over a longer period.
- Always verify that a product specifically lists St. Augustine as an approved grass type to avoid accidental damage.
- Calculate the square footage of your yard before purchase so you buy the exact amount of coverage required.
| Best Overall Liquid |  |
Simple Lawn Solutions Liquid Fertilizer | Fast nutrient absorption | Easy hose attachment application | Promotes thick growth | View on Amazon | Read Review |
| Perfect For Maintenance |  |
Simple Lawn Solutions Liquid 32oz | Compact storage size | Same fast-acting formula | Ideal for small lawns | View on Amazon | Read Review |
| Ideal Sample Size |  |
Simple Lawn Solutions Liquid 8oz | Low-cost entry point | Simple to store | Highly portable bottle | View on Amazon | Read Review |
| Heavy Duty Granular |  |
Fertilome St Augustine Weed Feed | Dual weed and feed | Extended nutrient release | Robust nitrogen content | View on Amazon | Read Review |
| Balanced Soil Builder |  |
Fertilome Centipede Lawn Fertilizer | Balanced nutritional profile | Promotes root strength | Sustained release action | View on Amazon | Read Review |
| Top Weed Specialist |  |
Southern Ag Atrazine Herbicide | Specialized weed control | Safe for St. Augustine | Highly effective liquid | View on Amazon | Read Review |
| Ultimate All-Rounder |  |
BioAdvanced 3-in-1 Southern Lawn | Three functions combined | Protects against insects | Simple application process | View on Amazon | Read Review |
More Details on Our Top Picks
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Simple Lawn Solutions Liquid Fertilizer
You want a thick, lush lawn without the hassle of dragging a heavy spreader across your yard. This liquid concentrate works like an intravenous drip for your grass, delivering nutrients directly to the soil where they are absorbed almost immediately.
It is ideal for homeowners who prefer a fast-acting boost rather than waiting for granular pellets to break down. Just keep in mind that since it absorbs so quickly, you will need to stick to a consistent application schedule to keep your grass growing vigorously all season.
- Brand Name:Simple Lawn Solutions
- Product Type:Liquid Lawn Food
- Total Capacity:1 Gallon
- Application Method:Hose-end sprayer
- Target Problem:Thin grass growth
- Additional Feature:Concentrated formula for larger yards
- Additional Feature:Encourages deep root development
- Additional Feature:Easy storage in garage
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Simple Lawn Solutions Liquid 32oz
Think of this as the smaller sibling to the gallon jug, providing the same high-quality nutrition in a more manageable size. It is the smart choice for spot treatments or smaller lawns where you do not need a massive supply of chemicals sitting in your shed.
Because the formula is identical to the larger version, you still get that rapid green-up effect that homeowners crave. Just be aware that if you have a large property, you will run through this bottle much faster than you might expect.
- Brand Name:Simple Lawn Solutions
- Product Type:Liquid Lawn Food
- Total Capacity:32 Ounces
- Application Method:Hose-end sprayer
- Target Problem:Nutrient deficiency
- Additional Feature:Ready to spray bottle
- Additional Feature:Precise application control
- Additional Feature:Consistent growth results
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Simple Lawn Solutions Liquid 8oz
Sometimes you only need a little bit of help to revive a struggling patch of St. Augustine. This 8-ounce bottle serves as an economical trial or a targeted solution for those tiny areas that just refuse to thrive.
You get the same professional-grade ingredients, but in a low-commitment package. It is certainly not the right move if you are planning to cover a front and back lawn, as you would need an entire case to get the job done.
- Brand Name:Simple Lawn Solutions
- Product Type:Liquid Lawn Food
- Total Capacity:8 Ounces
- Application Method:Hose-end sprayer
- Target Problem:Patchy growth
- Additional Feature:Easy to mix
- Additional Feature:Same nutrient profile
- Additional Feature:Quick cleanup
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Fertilome St Augustine Weed Feed
When your lawn is struggling with both unwanted weeds and nutrient hunger, this granular product acts as a two-for-one powerhouse. The 15-0-4 ratio provides a steady release of food that keeps your grass fed over several weeks.
It is a fantastic option for those who prefer the set-it-and-forget-it nature of granular fertilizer. Just make sure you have a quality spreader, as you need to distribute the granules evenly to avoid streaks of uneven growth.
- Brand Name:Fertilome
- Product Type:Granular Weed and Feed
- Total Capacity:25.6 lbs
- Primary Nutrient Ratio:15-0-4
- Application Method:Broadcast spreader
- Target Problem:Broadleaf weeds and nutrition
- Additional Feature:High nitrogen for greening
- Additional Feature:Effective weed control
- Additional Feature:Professional formula strength
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Fertilome Centipede Lawn Fertilizer
Don't let the name fool you, because this 15-0-15 balanced formula works wonders for St. Augustine that needs a complete nutritional overhaul. It provides equal parts nitrogen and potassium, which helps the plant build stronger roots and withstand the heat of the summer sun.
This is the best selection for someone looking for long-term health rather than just a quick, temporary color change. It is slightly less aggressive on weeds than other options, so consider it more of a tonic for tired soil.
- Brand Name:Fertilome
- Product Type:Granular Fertilizer
- Total Capacity:16 lbs
- Primary Nutrient Ratio:15-0-15
- Application Method:Broadcast spreader
- Target Problem:Poor soil nutrition
- Additional Feature:High potassium content
- Additional Feature:Ideal for stress tolerance
- Additional Feature:Consistent granular size
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Southern Ag Atrazine Herbicide
If your primary concern is an out-of-control weed population rather than feeding the grass, this is your primary tool. It targets specific broadleaf invaders while leaving your St. Augustine protected and healthy.
Think of this as a surgical instrument for your lawn. Since it is a herbicide, you must follow the dilution instructions very carefully to avoid burning your grass, as it is quite potent.
- Brand Name:Southern Ag
- Product Type:Herbicide
- Total Capacity:32 Ounces
- Application Method:Pump sprayer
- Target Problem:Broadleaf weeds
- Additional Feature:Concentrated professional formula
- Additional Feature:Easy to measure
- Additional Feature:Reliable weed termination
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BioAdvanced 3-in-1 Southern Lawn
Why buy three separate products when you can fix weeds, insects, and low nutrients in one pass? This product is the Swiss Army knife of lawn care for those who want to save time and effort.
It covers a massive range of common lawn problems, making it a convenient solution for busy homeowners. Just be mindful that because it does so many things, you should use it only when you actually face all three of those specific challenges.
- Brand Name:BioAdvanced
- Product Type:Granular Weed, Feed, Insect
- Total Capacity:10 lbs
- Application Method:Broadcast spreader
- Target Problem:Weeds, insects, nutrition
- Additional Feature:Systemic insect control
- Additional Feature:Added lawn nutrients
- Additional Feature:Effective broadleaf killer
Frequently Asked Questions
How often should I fertilize my St. Augustine grass?
You should aim for three to four applications per year during the active growing season. Space these out by about eight weeks to ensure the lawn has a steady supply of nutrients.
Can I use the same fertilizer I use for my flowers?
You really should avoid that. Most flower fertilizers have high phosphorus levels that can actually encourage fungus growth in your lawn. Stick to a formula designed for turfgrass to avoid these imbalances.
What is the best way to apply the granules?
Use a rotary spreader for the most even distribution across your property. Walk at a steady pace and overlap your passes slightly to prevent streaks of light and dark green grass.
Should I water after I apply the fertilizer?
Yes, you must water the lawn with about one quarter inch of irrigation after spreading. This helps wash the nutrients off the blades and into the soil where the roots can actually reach them.
Why do my grass tips look brown after fertilizing?
You likely applied too much product, which causes fertilizer burn. Always measure your lawn size accurately and follow the spreader settings on the bag to avoid applying a heavy concentration of nitrogen in one spot.
