Maintaining a lush, weed-free St. Augustine grass lawn requires the right weed and feed fertilizer. These products combine effective weed control with essential nutrients tailored for St. Augustine grass. Below is a summary table showcasing the top options available on Amazon designed specifically for your lawn care needs.
| Product | Brand | Coverage | Key Features |
|---|---|---|---|
| Fertilome St. Augustine Weed & Feed 15-0-4 | ferti-lome | Varies | Pre/post-emergent herbicide, designed for St. Augustine |
| Sunniland Weed & Feed 20-0-6 | Generic | 5000 sq. ft. | Easy to apply granules, suitable for all St. Augustine types |
| LESCO 50 lb. St. Augustine Grass Weed and Feed | LESCO | 13,000 sq. ft. | Slow-release formula, safe for Floratam variety |
| Scotts Turf Builder Triple Action | Scotts | 4,000 sq. ft. (2-Pack) | Kills weeds, prevents crabgrass, builds lawn strength |
| SeedRanch St. Augustine Lawn 24-2-11 Fertilizer | Lesco | 12,000 sq. ft. | Includes 6% iron for greening and nutrients for St. Augustine |
Fertilome St. Augustine Weed & Feed 15-0-4
The Fertilome St. Augustine Weed & Feed provides both pre-emergent and post-emergent herbicide action, effectively controlling existing weeds and preventing new ones. Its 15-0-4 fertilizer formula is specially designed for Centipede, Zoysia, and St. Augustine grass types. It’s important to note this product should not be used on Bermuda grass or other northern lawn grasses. Ideal for homeowners seeking targeted herbicide blended with essential nutrients, Fertilome’s mix supports lawn health while targeting weed control.
Sunniland Weed & Feed 20-0-6 Lawn Fertilizer
This Sunniland Weed & Feed fertilizer is designed for easy application with granules that spread evenly. It covers 5,000 square feet and recommends two applications annually—spring and fall—for optimal weed control and lawn nourishment. Formulated exclusively for all types of St. Augustine grass, it simplifies maintenance by combining weed prevention and fertilizer nutrients into one convenient product.
LESCO 50 lb. St. Augustine Grass Weed and Feed
The LESCO 50 lb. Weed and Feed offers robust lawn care with a 17-0-17 slow-release fertilizer formula enhanced with penoxsulam herbicide. Effective for up to 13,000 square feet, it is safe for Floratam St. Augustine grass and provides up to eight weeks of feeding. This product performs best when applied on wet turf, allowing the lawn to dry for total systemic weed control in about two weeks.
Scotts Turf Builder Triple Action Weed and Feed
Scotts Turf Builder Triple Action combines weed killing, crabgrass prevention, and lawn fertilization in a single formula. It effectively controls common weeds such as dandelion, clover, and chickweed while preventing crabgrass invasion for up to four months. Suitable for St. Augustine lawns, this product encourages thick, green grass by feeding while managing weed growth.
SeedRanch St. Augustine Lawn 24-2-11 Fertilizer
The SeedRanch 24-2-11 Fertilizer is formulated to enhance St. Augustine grass with a high nutrient concentration and 6% iron for superior greening effects. Covering up to 12,000 square feet, it promotes turf health and resilience. This fertilizer targets lawn nutrition primarily but can be combined with separate weed control treatments for specialized lawn care.
Buying Guide for Weed and Feed Fertilizer for St. Augustine Grass
Choosing the best weed and feed fertilizer for St. Augustine grass involves several key considerations to achieve a healthy, weed-free lawn:
- Fertilizer Ratio: Look for nutrient blends with nitrogen (N) to promote green, lush growth, moderate phosphorus (P) if needed, and adequate potassium (K) to improve root strength. St. Augustine grass generally benefits from balanced or nitrogen-rich formulas.
- Weed Control Type: Select products featuring both pre-emergent (prevents weed seeds from germinating) and post-emergent (kills existing weeds) herbicides for comprehensive weed coverage.
- Grass Type Compatibility: Ensure the product explicitly states it is safe for St. Augustine grass to avoid damage, especially regarding Floratam or other specific varieties.
- Application Timing: Optimal application times often include spring and fall seasons to coincide with growing and dormancy cycles for maximum effectiveness.
- Coverage Area: Choose a size based on your lawn square footage to avoid waste or shortage, considering reapplication frequency as well.
- Release Type: Slow-release fertilizers provide sustained feeding over weeks, reducing application frequency and risk of lawn burn compared to quick-release options.
- Ease of Use: Products with easy-to-spread granules or ready-to-apply liquids can make lawn care more manageable, especially for large areas.
- Additional Nutrients: Some formulations add iron or other minerals that enhance greening and lawn vigor beyond standard NPK nutrients.
By focusing on these factors, homeowners can select the best weed and feed fertilizer tailored to their St. Augustine grass lawn’s needs, supporting both weed control and healthy turf growth throughout the growing season.