Maintaining a lush St. Augustine lawn means tackling dollar weed and other common weeds without harming the grass. The right weed killer can provide fast, visible results while protecting your turf. This guide highlights five effective products designed to target dollar weed and similar broadleaf weeds in St. Augustine grass. Each option is evaluated for lawn safety, coverage, and ease of use to help you choose confidently.
| Product | Why It Fits St. Augustine | Coverage |
|---|---|---|
| Ortho WeedClear Weed Killer for Lawns | Kills dollar weed and dozens of weeds while being lawn-friendly when used as directed | Up to 16,000 sq. ft. per bottle |
| Southern Ag Atrazine St. Augustine Grass Weed Killer | Specifically labeled for St. Augustine grass and crabgrass suppression | 1 gallon concentrate provides broad coverage |
| Hi-Yield Atrazine Weed Killer (32 oz) | Designed for St. Augustine and centipedegrass with selective control | Treats up to roughly 3,720 sq. ft. |
| Hi-Yield Atrazine Weed Killer | Targets common annual weeds in St. Augustine/Centipede lawns | Label-based coverage |
| Prime Source Celsius WG | Post-emerge weed control with easy mix and fast action | Packet form simplifies mixing for precise use |
Ortho WeedClear Weed Killer for Lawns Ready-To-Spray
Ortho WeedClear is designed to kill weeds at the root while keeping the lawn intact when used as directed. It targets more than 250 common weeds, including dollar weed and dandelions, with visible results often within hours. The formula relies on three proven ingredients to target broadleaf weeds without harming grass under proper use. For St. Augustine lawns, this product offers a convenient Ready-To-Spray approach that supports quick, even coverage across the yard.
Southern Ag Atrazine St. Augustine Grass Weed Killer
This Atrazine-based product is labeled for St. Augustine grass and is known for controlling a broad range of weeds while providing suppression of crabgrass. It is commonly used in warm-season lawns where dollar weed remains a concern. The one-gallon format helps cover large areas and can be an economical choice for established lawns with persistent weed pressure.
Hi-Yield (33430) Atrazine Weed Killer
This 32-ounce bottle is formulated for selective weed control in St. Augustine and centipedegrass. It targets multiple broadleaf weeds, including clover and chickweed, while preserving desirable turf when used according to the label. Coverage depends on the lawn size and dilution rate, so follow directions for best results.
Hi-Yield Atrazine Weed Killer
This Atrazine-based option is labeled for use in St. Augustine and centipedegrass, offering selective control of several common weeds. It is useful for homeowners dealing with annual bluegrass and other problematic species. As with similar products, precise application according to the label is essential to protect turf health and ensure effective results.
Prime Source Celsius WG
Prime Source Celsius WG comes as an easy-mix post-emerge weed control option with professional-grade quality. The 0.226 oz easy mix packet format reduces measuring and handling steps, helping ensure precise application. It emphasizes fast-acting results and is designed for lawn professionals and dedicated DIYers seeking reliable weed suppression in St. Augustine lawns.
Buying Guide: Key Purchase Considerations and Comparisons
When choosing a dollar weed killer for St. Augustine grass, consider grass health, weed spectrum, coverage, and application method. Atrazine-based options are common for St. Augustine and centipede lawns, but always verify labeling to ensure compatibility with your turf and local regulations. Look for products described as lawn-friendly when used as directed to minimize risk to the grass.
- Weed Spectrum: Confirm that the product targets dollar weed and other broadleaf weeds you see in your lawn, such as dandelion, clover, and chickweed.
- Grass Safety: Pay attention to labels that specify St. Augustine or centipedegrass use and follow dilution and timing guidelines carefully.
- Application Method: Ready-to-spray products offer quick use, while concentrates require mixing. Consider your comfort level and equipment availability.
- Coverage Area: Compare per-bottle or per-packet coverage to estimate how many applications your lawn needs, factoring in lawn size and weed pressure.
- Environmental and Seasonal Timing: Some products work best during active weed growth or specific seasons. Plan applications when lawns are actively growing for optimal uptake.
- For maximum effectiveness, identify the dominant weeds in your lawn and choose a product labeled for St. Augustine or centipedegrass.
- Apply during calm, dry days to avoid drift and ensure good absorption into the target weeds.
- Never apply more than the label recommends, and avoid mowing the lawn immediately before or after treatment as directed.
- Consider a follow-up program if persistent or new weed growth appears after the initial treatment.