St. Augustine lawns require specialized weed control that targets common broadleaf and grassy invaders without harming the grass. The products below are specifically formulated or widely used for St. Augustine and Centipede grasses, offering selective herbicides, pre- and post-emergent options, and combination weed-and-feed formulas. Use as directed, consider lawn conditions, and follow safety guidelines for best results.
| Product | Brand | Type | Coverage |
|---|---|---|---|
| Southern Ag 006130 Atrazine St. Augustine Weed Killer | Southern Ag | Atrazine Weed Killer | 3,720 sq ft per quart |
| Southern Ag Atrazine St. Augustine Grass Weed Killer | Southern Ag | Atrazine Weed Killer | 1 gallon |
| Fertilome St. Augustine Weed & Feed | ferti-lome | Weed & Feed (Pre/Post) | Varies by bag size |
| Hi-Yield Atrazine Weed Killer | VPG | Atrazine Weed Killer | Various coverages by package |
| Southern Ag Atrazine St. Augustine Weed Killer + Celsius WG | Southern Ag | Atrazine + Celsius | 3,720 sq ft |
Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz
Overview: This atrazine-based herbicide is designed to control broadleaf and certain grassy weeds in St. Augustine lawns. One quart covers up to 3,720 square feet, helping suppress crabgrass and other common lawn weeds. It is labeled for improvements in St. Augustine and Centipede grasses, making it a practical option for mid-season weed control routines.
Southern Ag Atrazine St. Augustine Grass Weed Killer
Overview: This gallon-size atrazine formulation targets a broad spectrum of weeds in St. Augustine and Centipede lawns. It offers suppression of crabgrass and broadleaf weeds, providing a broader window for application across the growing season. Suitable for established lawns, it supports ongoing weed management without heavy chemical inputs.
Fertilome St. Augustine Weed & Feed
Overview: A combined pre-emergent and post-emergent formula that feeds as it weeds. This 15-0-4 mix is designed for Centipede, Zoysia, and St. Augustine grasses, providing weed suppression and lawn nourishment. It is not recommended for Bermuda or certain Northern grasses, so confirm compatibility with your lawn type before use.
Hi-Yield Atrazine Weed Killer
Overview: Hi-Yield Atrazine Weed Killer is formulated for use in St. Augustine and Centipede grasses. It targets common weeds such as annual bluegrass and chickweed, providing control options through a trusted atrazine-based product. Suitable for mid-season treatment plans and as part of a broader weed management program.
Southern Ag Atrazine St. Augustine Weed Killer 32oz + Celsius WG
Overview: This bundle pairs a 32-ounce atrazine formula with Celsius WG, a broad-spectrum post-emergent weed control option. The combination targets a wide range of weeds while maintaining safety for St. Augustine and Centipede grasses, and Celsius WG adds efficacy against over 120 weed species, including dandelions, with crabgrass suppression benefits.
Prime Source Celsius WG
Overview: A ready-to-mix post-emergent weed control option, Celsius WG is designed for professional-grade efficacy. While not a standalone all-season solution for every lawn, it complements atrazine products by extending weed control across a broader spectrum of species in St. Augustine and Centipede lawns.
Scotts Turf Builder Southern Triple Action
Overview: A three-in-one formula that kills listed weeds, prevents and kills fire ants, and feeds the lawn. It is labeled for Southern grasses including St. Augustine and Centipede, and provides ongoing protection against heat- and drought-related stress with a fertilizer boost. Useful for combined weed control and lawn nourishment in warmer climates.
BioAdvanced 3-in-1 Weed and Feed for Southern Lawns
Overview: Specially formulated for Southern lawns, including St. Augustinegrass, this product delivers up to six months of weed prevention while killing listed weeds such as dandelion and dollarweed. It also acts as a lawn fertilizer, supporting long-term lawn health alongside weed suppression.
Buying Guide: Key Purchase Considerations
- Grass type compatibility: Confirm St. Augustine or Centipede suitability, and avoid bermudagrass unless specified.
- Active ingredients: Atrazine-based products are common, but consider Celsius WG or other post-emergents to broaden weed control and reduce resistance risk.
- Seasonality: Pre-emergent options prevent weed seeds, while post-emergents target existing weeds. Plan applications around the lawn’s growing cycle.
- Weed spectrum: Assess the weeds typical to your area (dandelion, crabgrass, clover, annual bluegrass) and choose products targeting those species.
- Combination products: Weed-and-feed formulas save time but read label for compatibility with existing fertilization plans and irrigation schedules.
- Environmental and safety considerations: Follow label directions, store securely, and observe safety precautions for pets and children.
- Application rate and coverage: Use products within the stated coverage per quart or gallon to avoid under- or over-application.
- Resistance management: Rotate active ingredients or mix modes of action when appropriate, to reduce weed resistance development.