Fall is a critical window for St Augustine grass. The right weed-and-feed product helps reduce weed pressure while feeding roots to prepare for spring growth. Below are five products that balance effective weed control with seasonally appropriate fertilization, tailored to St Augustine lawns. Each choice targets common fall weeds and supports a healthy autumn-to-winter transition.
| Product | Coverage | Key Benefit |
|---|---|---|
| Scotts Turf Builder WinterGuard Fall Weed & Feed3 (4,000 sq ft) | 4,000 sq ft | Kills 50+ weeds; fall feeding for next spring |
| Scotts Turf Builder WinterGuard Fall Weed & Feed3 (12,000 sq ft) | 12,000 sq ft | Broad weed control with substantial area coverage |
| Scotts Turf Builder WinterGuard Fall Weed & Feed3 (5,000 sq ft, 2-Pack) | 5,000 sq ft per bag | Two bags in one package for value and convenience |
| The Andersons Premium Weed and Feed 24-0-16 | Up to 5,000 sq ft | Broad weed control with combined quick and slow-release nitrogen |
| Additional Notes | N/A | Multiple options offer scalable coverage for medium to large yards |
When selecting a fall weed-and-feed for St Augustine grass, consider weed type coverage, lawn size, and how quickly you want results. The products listed here address common fall weeds while delivering adequate nutrition to support green-up in the following spring. Always follow label directions for best results and safety.
Scotts Turf Builder WinterGuard Fall Weed & Feed3 (4,000 sq ft)
Scotts Turf Builder WinterGuard Fall Weed & Feed3 combines weed killing with fall fertilizer, designed to suppress over 50 listed lawn weeds including clover, dandelion, and plantain. It is formulated to apply on a moist lawn when weeds are actively growing and temperatures range from 60°F to 90°F. This product helps reduce weed competition while feeding St Augustine grass to promote a healthier lawn next spring. Coverage for 4,000 sq ft makes it a good fit for small-to-medium lawns or patch applications on larger yards.
Scotts Turf Builder WinterGuard Fall Weed & Feed3 (12,000 sq ft)
This 12,000 sq ft option offers the same weed-control capabilities and fall-fertilizer benefits as the smaller bag, scaled for larger lawns. It targets a broad spectrum of fall weeds and supports a nutrient boost for St Augustine grass amid seasonal stress. Apply when weeds are actively growing and weather is favorable, ensuring even coverage across the lawn. Ideal for homeowners with larger properties seeking a single-product solution for fall maintenance.
Scotts Turf Builder WinterGuard Fall Weed & Feed3 (5,000 sq ft, 2-Pack)
This 2-pack provides two 5,000 sq ft bags, offering convenient coverage for mid-sized lawns. The product controls listed fall weeds while feeding grass to improve density and color come spring. It is particularly suitable for homeowners who prefer a cost-effective set that reduces the need for multiple applications. Follow timing guidelines to ensure weeds are actively growing and temperatures are within the recommended range.
The Andersons Premium Weed and Feed 24-0-16
The Andersons Premium Weed and Feed 24-0-16 provides robust broadweed suppression along with a blend of quick- and slow-release nitrogen to support fast green-up and extended feeding. Suitable for St Augustine lawns, it covers up to 5,000 sq ft per application, offering a balanced approach to weed control and nutrition. It’s especially beneficial for lawns facing persistent broadleaf weeds, helping to reduce recurrent invasions while maintaining turf health as temperatures cool.
Buying Guide: Key Considerations For Fall Weed And Feed On St Augustine
- Weed spectrum: Look for products that target common fall weeds like clover, dandelion, plantain, and chickweed. The best options list weeds by name on the label, ensuring you select a product that matches your weed profile.
- Coverage and lawn size: Choose a bag size that aligns with your yard. Larger lawns benefit from bigger bags or multi-pack options to minimize reapplication frequency.
- Nitrogen form and release: Quick-release nitrogen provides rapid greening, while slow-release nitrogen sustains color and growth over time. For St Augustine, a balanced mix helps avoid rapid growth surge that can lead to thatch buildup.
- Timing and temperature: Fall products are most effective when weeds are actively growing and temperatures stay between roughly 60°F and 90°F. Improper timing can reduce weed control efficacy and fertilizer uptake.
- Safety and lawn tolerance: St Augustine grass can be sensitive to certain herbicides. Check label directions and site compatibility, especially on drought-stressed or young lawns to minimize stress.
- Repeated applications: Some products are designed for multiple applications within a season. Consider whether you need a one-time solution or a program that spans fall into early winter.
- Environmental impact: Favor products with weed control that minimizes runoff and supports sustainable lawn care practices.
- Maintenance goals: If your priority is rapid green-up, prioritize products with both weed suppression and quicker nutrient release. If you want longer-lasting color, select formulations with slower nitrogen release.
Choosing the right fall weed-and-feed for St Augustine grass involves balancing weed control breadth, nutrient timing, and yard size. The options above provide scalable solutions, from compact 4,000 sq ft treatments to larger 12,000 sq ft coverage, and include combined weed suppression with fertilizer to help your lawn transition smoothly into spring.