Best Weed and Feed Solutions for St. Augustine Grass Lawns 2025
Maintaining a healthy and vibrant St. Augustine grass lawn requires effective weed control combined with proper fertilization. Using weed and feed products specially formulated for St. Augustine grass can help control invasive weeds while providing essential nutrients to the lawn. Below is a summary table of selected top-performing weed and feed products designed specifically for St. Augustine and similar southern grasses.
| Product | Brand | Weight | Key Features |
|---|---|---|---|
| Fertilome St. Augustine Weed & Feed 15-0-4 | ferti-lome | 12.8 lbs. | Pre & post-emergent herbicide, 15-0-4 fertilizer, for St. Augustine and southern grasses |
| LESCO St. Augustine Grass Weed and Feed with Penoxsulam | LESCO | 50 lbs. | 17-0-17 fertilizer, slow release, safe for Floratam, feeds up to 8 weeks |
| BioAdvanced 3-in-1 Weed and Feed for Southern Lawns | BioAdvanced | 10 lbs. | 6-month weed prevention, kills broadleaf and grassy weeds |
| Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz | Southern Ag | 32 oz. | Treats 3,720 sq ft, controls weeds in St. Augustine and Centipede grasses |
| Scotts Turf Builder Southern Lawn Fertilizer | Scotts | 28.12 lbs. | Builds strong roots, drought and heat protection, formulated for Southern lawns |
Fertilome St. Augustine Weed & Feed 15-0-4
This pre-emergent and post-emergent herbicide effectively controls weeds while providing a balanced 15-0-4 fertilizer tailored for St. Augustine, Centipede, and Zoysia grasses. The product supports weed control and lawn nutrition simultaneously, helping prevent weed growth before it starts and combating existing weeds. It is, however, not suitable for Bermuda or northern grass varieties, making it essential to identify your lawn type before use. This fertilizer and herbicide combo applies easily and promotes healthy turf growth while reducing competition from weeds.
LESCO St. Augustine Grass Weed and Feed with Penoxsulam
Designed specifically for St. Augustine grass, LESCO’s 17-0-17 formula combines a slow-release nitrogen fertilizer with a powerful weed control agent, penoxsulam. This product covers approximately 13,000 sq ft and offers up to 8 weeks of feeding. The poly-coated sulfur-coated urea provides gradual nutrient release, ensuring long-lasting lawn health. Safe for Floratam variety lawns, it should be applied when the turf is wet and allowed to dry for maximum efficacy. This weed and feed delivers a strong defense against both existing and emerging weeds, while promoting lush green growth.
BioAdvanced 3-in-1 Weed and Feed for Southern Lawns
Formulated for Southern lawns including St. Augustine and Floratam, this 3-in-1 granule provides weed control, lawn feeding, and up to 6 months of weed prevention. It targets broadleaf weeds such as dandelions, dollarweed, and clover, while also addressing grassy weeds like crabgrass. The fertilizer uses a special nutrient mix suitable for southern turf, supporting lawn health while eliminating weeds. This extended protection reduces reapplication frequency and aids in maintaining your lawn’s beauty throughout growing seasons.
Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz
This specialty herbicide’s one-quart bottle treats up to 3,720 sq ft of St. Augustine and Centipede grasses. Atrazine is effective for controlling many common broadleaf weeds specific to southern lawns. Though it does not provide fertilizer, its potent weed control complements fertilization programs and can be used in rotational weed and feed strategies. The liquid formula allows for precise application, helping manage weed outbreaks without harming your grass.
Scotts Turf Builder Southern Lawn Fertilizer
Specifically formulated for Southern lawns like St. Augustine grass, this fertilizer uses Scotts’ All-in-One Particles that build strong and deep roots, improving resistance to heat and drought. While this product focuses primarily on feeding rather than herbicide action, it supports lawn vitality which can help reduce weed intrusion. The fertilizer can be applied to wet or dry grass during the growing season, encouraging thick, healthy turf growth that naturally crowds out weeds.
Buying Guide For Weed And Feed Products For St. Augustine Grass
Choosing the right weed and feed product for St. Augustine grass requires considering the following key factors:
- Lawn Grass Type Compatibility: Ensure the product specifically states it’s safe for St. Augustine grass, as certain fertilizers and herbicides can damage this lawn type.
- Weed Control Spectrum: Look for products offering both pre-emergent and post-emergent weed control. Broadleaf weed and grassy weed coverage is ideal for comprehensive lawn protection.
- Nutrient Composition: Balanced fertilizer ratios supporting nitrogen, phosphorus, and potassium needs of St. Augustine grass promote healthy growth and recovery after weed removal.
- Application Conditions: Some feeds require application on wet grass or specific weather conditions for optimal results. Follow manufacturer guidance carefully.
- Release Mechanism: Consider slow-release fertilizers for sustained feeding versus quick-release options for immediate nutrient delivery.
- Weed Prevention Duration: Longer residual protection (up to 6 months) can reduce the frequency of treatments and labor.
- Safety and Environmental Impact: Choose products with labeled safe use instructions that protect surrounding plants and minimize runoff impact.
By comparing these aspects, you can select a weed and feed product that best suits your lawn care goals while effectively maintaining a lush and weed-free St. Augustine lawn.