Best Weed Killers Safe for St. Augustine and Bermuda Grass
The best fit for both St. Augustine and Bermuda grass in this selection is Celsius WG, whose product information lists both turf types as suitable when used as directed. Southern Ag Atrazine and Image are better considered for St. Augustine-focused weed control, while Ortho is an option for listed weeds on established warm-season lawns. Check the product label for your grass type, target weed, application rate, and restrictions before treating.
| Product | Best For | Important Note |
|---|---|---|
| Celsius WG Herbicide 2-Pack | Both St. Augustine and Bermuda | Not for cool-season grasses |
| Southern Ag Atrazine, 32 oz | St. Augustine and centipede | Bermuda is not listed in the supplied features |
| Southern Ag Atrazine, 1 gallon | Broadleaf weeds and crabgrass suppression | Use only where the label permits |
| Image Herbicide, 32 oz | St. Augustine, including Floratam lawns | Bermuda suitability is not stated in the supplied features |
| Ortho Nutsedge Killer, 32 fl. oz | Listed sedge and broadleaf weeds | Confirm your grass type and weed are on the label |
Celsius WG Herbicide 2-Pack
Best for: Homeowners seeking a listed option for both St. Augustine and Bermuda grass. The supplied product information names both grasses, along with centipede, zoysia, and buffalograss, as suitable when used as directed.
The two-pack is described as providing two treatments, with each packet mixed into two gallons and coverage listed up to 4,000 square feet. The listed weeds include crabgrass, dollarweed, clover, and dandelion. A weed identification card is also included.
Why it was selected: It is the clearest match for shoppers looking for one product specifically described for both St. Augustine and Bermuda. Limitation: The listing says not to use it on cool-season grasses, and application directions still need to be followed.
Southern Ag Atrazine, 32 Ounces
Best for: St. Augustine and centipede lawns where the target weeds and use are allowed by the label. The supplied features say one quart treats 3,720 square feet and identify use on St. Augustine and centipede grasses.
Why it was selected: It provides a stated coverage figure and names two warm-season grasses relevant to southern lawns. It may suit buyers treating a defined lawn area who want a product specifically presented for St. Augustine.
Limitation: Bermuda grass is not named in the supplied product features. Do not assume it is safe for Bermuda; check the current product label before use.
Southern Ag Atrazine, 1 Gallon
Best for: Buyers looking for a larger container of atrazine for uses permitted on the label. The listing says it kills many broadleaf weeds, can also be used in centipede grass, and provides suppression of crabgrass.
Why it was selected: Its stated weed-control uses make it relevant to homeowners comparing options for broadleaf weeds and crabgrass suppression in southern lawns.
Limitation: The supplied features do not explicitly confirm Bermuda suitability or give coverage information. Choose this only after checking that your grass type and intended application are listed on the label.
Image Herbicide For Southern Lawns
Best for: St. Augustine owners, especially those with Floratam lawns, who want a ready-to-use weed-killer sprayer. The supplied features describe it as designed for Floratam lawns and say visible results may appear in hours.
Why it was selected: The product is specifically marketed for St. Augustine grass, so it is a relevant comparison for homeowners whose main concern is protecting that turf while treating weeds.
Limitation: The supplied information does not state that it is suitable for Bermuda grass. Avoid using it on Bermuda unless the product label explicitly permits that use.
Ortho Nutsedge Killer Ready-To-Spray
Best for: Lawn owners targeting listed sedge and broadleaf weeds who prefer a hose-connected sprayer. The product information says it may be used on well-established cool- and warm-season turf grasses and controls listed weeds including wild violet, dollarweed, dandelion, purslane, and spurge.
Why it was selected: It offers a different approach for shoppers focused on nutsedge and other listed weeds rather than general lawn treatment.
Limitation: The supplied details do not name St. Augustine or Bermuda individually. Confirm both your turf and target weed are permitted by the label before spraying.
Buying Guide: How To Choose A Weed Killer
Is the product labeled for your exact grass?
Start with the turf type, not just the weed. St. Augustine and Bermuda are different grasses, and a product suitable for one should not automatically be treated as suitable for the other. Among these options, Celsius WG is the one whose supplied details explicitly name both. For other products, rely on the current label’s approved turf list.
Which weed are you trying to control?
Identify the weed before choosing a treatment. The listed products mention different targets: Celsius WG names crabgrass, dollarweed, clover, and dandelion; Ortho names sedge and several broadleaf weeds; Southern Ag Atrazine lists broadleaf weed control and crabgrass suppression. A product’s general lawn-weed claim does not guarantee it controls every weed.
Do you need a ready-to-spray product or measured treatment?
Ortho is described as connecting to a garden hose for application. Image is listed as a weed-killer sprayer. Celsius WG is supplied in packets that are mixed with water, while the Southern Ag Atrazine options have stated container sizes. Follow label directions for mixing, coverage, timing, and repeat applications.
What precautions matter before application?
Read the full label before use, including restrictions for grass variety, weather, application frequency, and treated areas. Apply only at the labeled rate. Keep people and pets away as directed, and avoid spraying desirable plants. If your lawn includes multiple grass types, verify that the product is safe for every turf area you plan to treat.
Frequently Asked Questions
What product here is listed for both St. Augustine and Bermuda?
Celsius WG is the product whose supplied information explicitly lists both grasses as suitable when used as directed. Confirm its current label and follow all application instructions.
Can I use Southern Ag Atrazine on Bermuda grass?
The supplied features name St. Augustine and centipede, not Bermuda. Check the product label for Bermuda approval before use; do not infer suitability from its use on other warm-season grasses.
Is Image Herbicide suitable for every St. Augustine lawn?
The supplied listing says it was designed for Floratam lawns. Check the product label for your specific St. Augustine variety and application conditions.
Can Ortho Nutsedge Killer be used on warm-season lawns?
The supplied information says it may be used on well-established warm-season turf grasses. Check the label to confirm your specific grass and target weed are included.
Should I treat weeds before identifying them?
No. Identify the weed first, then confirm that the product lists it as a target. This helps avoid choosing a treatment that does not address the problem or is not appropriate for your grass.