Maintaining a lush St. Augustine lawn means balancing weed control with feeding. The right weed-and-feed products can suppress common pests while delivering nutrients to your turf. Below are five purpose-built options designed to protect St. Augustinegrass, including Floratam varieties, and keep your lawn healthy through the growing season. Each product blends weed suppression with fertilizer to reduce application steps and time outside.
| Product | Key Benefit | Coverage Note |
|---|---|---|
| BioAdvanced 3-in-1 Weed and Feed | Long-lasting weed prevention up to 6 months | Best for Southern lawns, including St. Augustine |
| Sunniland St. Augustine Weed & Feed | Easy to spread; spring and fall applications | Versatile for all St. Augustine grasses |
| Southern Ag 006130 Atrazine Weed Killer | Targets weeds in St. Augustine and centipede grasses | Broad-spectrum control in a 32 oz bottle |
| LESCO 50 lb. St. Augustine Weed & Feed | Professional-grade, slow-release feeding | Designed for large lawns and Floratam |
| Spectracide Weed & Feed 20-0-0 Ready-to-Spray | Dual-action: kills weeds and feeds lawn | Convenient 32 fl oz container for quick use |
As you read through the options, consider your lawn size, preferred application schedule, and whether you want a pre-emergent or post-emergent approach. The following sections break down each product, its key features, and how it fits into a St. Augustine care plan. This guide aims to help you compare products objectively and decide which mix best aligns with your goals for a thick, weed-minimized lawn.
BioAdvanced 3-in-1 Weed and Feed For Southern Lawns
BioAdvanced’s 3-in-1 formula targets common Southern lawn weeds while providing fertilizer to St. Augustine and Floratam varieties. The product emphasizes long-lasting weed prevention, with coverage claimed for up to six months. Its broad-weeds approach includes crabgrass among the list of controllable species, making it a practical option for warm-season yards that experience year-round growth. The granulated format suits large areas and can reduce the frequency of applications when used as directed.
Key considerations: The multi-action approach can simplify lawn care, especially for busy homeowners who want weed suppression and feeding in one step. Users should follow labeled timings for best results and ensure proper watering after application to activate the release of nutrients and active weed killers. It’s designed for southern turfgrass blends, including St. Augustinegrass and Floratam.
Sunniland St. Augustine Weed & Feed Lawn Fertilizer
Sunniland’s weed-and-feed is positioned as a straightforward option for St. Augustine grasses. The product features easy-to-spread granules and a simple two-application-per-year schedule in spring and fall, which aligns well with typical seasonal weeds and growth cycles. It’s described as suitable for all St. Augustine varieties, making it a flexible choice for households with different St. Augustine strains on the same lawn. The approach blends weed suppression with fertilization to promote uniform green-up and overall lawn health.
Key considerations: This option emphasizes ease of use and a predictable two-application plan. While it may not advertise extended protection like six months, its simplicity can be attractive for homeowners who want minimal maintenance. Ensure even coverage and light watering after application to help the granules activate and reach the root zone for feeding and weed control.
Southern Ag 006130 Atrazine St. Augustine Weed Killer
Southern Ag’s Atrazine-based product focuses on weed suppression for St. Augustine grass, with coverage suitable for residential lawns. As a specialty herbicide, it targets a range of broadleaf and grassy weeds that commonly invade warm-season turf, including St. Augustine varieties. The 32-ounce bottle is designed for easy application across mid-to-large lawns, with the stated capability to treat thousands of square feet per unit depending on dilution and spray settings.
Key considerations: Atrazine-based products often require careful application to minimize impact on non-target species and to adhere to local environmental guidelines. This option is especially relevant for lawns dealing with persistent broadleaf weeds and grassy invaders. Check compatibility with Floratam and other St. Augustine cultivars, and follow label directions for timing relative to growth cycles and irrigation.
LESCO 50 Lb. St. Augustine Weed & Feed
LESCO’s professional-grade blend is a large-quantity option designed for St. Augustine turf. The product label highlights a formulation aimed at Floratam-friendly formulations with slow-release nutrients and a fortified delivery system. It’s designed to cover substantial square footage and deliver up to several weeks of feeding, with a focus on integrated weed control and sustained lawn health. The slow-release mechanism helps reduce the risk of nutrient flush and supports steady growth during the season.
Key considerations: This product suits larger properties or professional-grade lawn care programs. Slow-release feeding can provide extended green-up and reduce the number of applications. Ensure you apply under appropriate moisture conditions and adhere to the product’s recommended watering and drying times for optimal performance and safety on Floratam varieties.
Spectracide Weed & Feed 20-0-0 Ready-to-Spray
Spectracide’s weed-and-feed combines a 20 percent nitrogen fertilizer with a broad weed-kill action in a ready-to-spray format. This option emphasizes convenience for users who prefer a spray bottle rather than granules, enabling quick treatment of visible weeds while feeding the lawn. The product is positioned to handle broadleaf weeds such as dandelions and other common invaders, alongside normal lawn nutrition to promote healthier turf growth in St. Augustine lawns.
Key considerations: Ready-to-spray formats offer quick coverage and can be easier to apply in tight spaces or around landscape features. Follow spray guidelines, avoid applying to stressed or drought-weary lawns, and water lightly if required by the label to aid uptake. Ensure compatibility with St. Augustine varieties and avoid oversaturation to prevent runoff or leaf burn.
Spectracide Weed Stop For Lawns (Concentrate)
Spectracide Weed Stop is a concentrate designed for St. Augustine and centipede lawns, marketed as a lawn-specific weed killer that minimizes harm to the grass when used as directed. The presence of atrazine in some Spectracide formulations helps provide broader control across emerging and existing weeds. The product supports weed management without requiring a separate fertilizer step, depending on the formulation used.
Key considerations: Concentrates require precise mixing and spraying accuracy to achieve even coverage. They can deliver flexibility for customized rates and sizes of treated areas. Review the label for compatible grass types and any cautions related to St. Augustine varieties. Proper calibration and adherence to the recommended water volume are essential for best results.
Scotts Halts Crabgrass & Grassy Weed Preventer
Scotts Halts provides a pre-emergent option designed to prevent germination of crabgrass, foxtail, spurge, and other common grassy weeds in the early spring and fall. While primarily a pre-emergent, its use in a St. Augustine lawn helps reduce weed establishment during critical growth phases. This product is well-suited for homeowners who want proactive weed prevention to complement ongoing fertilizer programs.
Key considerations: Pre-emergents are most effective when applied before weed seeds germinate, typically in early spring or fall. They work best on dry lawns and may require specific irrigation after application. Verify compatibility with your St. Augustine cultivar and local guidelines on pre-emergent use in warm-season lawns.
Buying Guide: Key Purchase Considerations And Comparisons
When choosing a weed-and-feed product for St. Augustine grass, consider weed species prevalence, growth stages, and overall lawn care goals. Here are key factors to weigh:
- Weed targets and timing: Post-emergent vs. pre-emergent, broadleaf versus grassy weed control, and seasonal timing. Choose based on weed pressure and your preferred maintenance schedule.
- Grass compatibility: Confirm compatibility with St. Augustine varieties, especially Floratam, and avoid products with ingredients that can harm sensitive cultivars.
- Nutrient release: Slow-release blends provide steady feeding and reduce the risk of fertilizer burn, while quick-release formulas give rapid green-up after application.
- Application method: Granular vs. liquid, ready-to-use sprays, or concentrates. Select a method that fits your yard size, equipment, and comfort level.
- Coverage area: Larger lawns benefit from bulk formulations, while smaller yards can use concentrated or spray formats for precise application.
- Environmental considerations: Be mindful of mowing schedules, rainfall, and irrigation requirements to maximize efficacy and minimize runoff.
For optimal results, rotate or mix products as needed to address evolving weed challenges through the growing season. Always follow the product label for application rates, timing, and safety precautions. Consider consulting a local lawn care professional if you have a particularly large yard, Floratam-specific concerns, or persistent weed issues.