If you’re battling stubborn weeds in St. Augustine and Bermuda lawns, you need products formulated for warm-season grasses that minimize damage to your turf. The following selections are chosen for their suitability to St. Augustine and Bermuda grasses, their broad weed control profiles, and practical application guidance. This guide highlights who each product is best for, plus potential limitations to consider before buying.
| Product | Best For | Key Takeaway |
|---|---|---|
| Southern Ag 006130 Atrazine St. Augustine Weed Killer | St. Augustine and Centipede lawns | Strong broadweed control in warm-season grasses |
| Ortho Nutsedge Killer for Lawns Ready-to-Spray | Lawns with sedges and listed broadleaf weeds | Easy hose-end spray; good for sedges |
| Southern Ag Atrazine St. Augustine Grass Weed Killer | St. Augustine and centipede grasses | Kills many broadleaf weeds; centipede use |
| Ortho WeedClear Lawn Weed Killer Ready to Spray | General lawn weed control | Roots-targeted, lawn-friendly when used as directed |
| Ortho WeedClear Lawn Weed Killer Ready-To-Use with Comfort Wand | Small to mid-size lawns with active weeds | Spot-treat convenience; minimal lawn impact |
Southern Ag Atrazine St. Augustine Weed Killer 32oz
This atrazine-based herbicide is designed for St. Augustine and centipede grasses, offering broad weed suppression in a single quart. Best for homeowners managing weed pressure across a medium-to-large yard who want a straightforward application.
- Controls a wide range of weeds in St. Augustine and Centipede grasses
- Package covers up to about 3,720 sq ft per quart
- Package weight is 1.021 kilograms
Best for: Homeowners with St. Augustine or centipede lawns needing broad weed control.
Caution: Atrazine can affect non-target grasses if misapplied; follow label directions for application areas and rates.
Ortho Nutsedge Killer for Lawns Ready-to-Spray
Ortho’s ready-to-spray formulation targets sedges such as nutsedge, along with several listed weeds. It’s ideal for lawns that see sedge infestations and need a quick, hose-end treatment without heavy mixing.
- Use with a garden hose connected to a sprayer
- Kills sedges and several broadleaf weeds while staying lawn-safe when used as directed
- May be used on well-established cool-season and warm-season turf grasses
Best for: Lawn owners dealing with nutsedge alongside broadleaf weeds, seeking a quick spray solution.
Caution: Not intended for use on all grass types; verify your turf is compatible before treating large areas.
Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon
This gallon-sized atrazine product provides broadleaf weed control compatible with St. Augustine and centipede grasses. It’s suitable where larger outdoor areas need sustained weed suppression across seasons.
- Kills many broadleaf weeds and is also used in centipede grass
- Provides suppression of crabgrass in some applications
Best for: Larger lawns with St. Augustine or centipede turf that require ongoing broadleaf weed control.
Caution: Atrazine should be used as directed to avoid turf injury; avoid applying to stressed lawns or incompatible turf types.
Ortho WeedClear Lawn Weed Killer Ready to Spray
Designed to target a broad spectrum of lawn weeds without harming grass when used as directed, this ready-to-spray solution offers visible results in hours and is rainproof after drying. It is a versatile choice for mixed weed pressures.
- Kills weeds to the root with a lawn-friendly formula
- Simple hose-end application; results may appear within hours
- Three proven ingredients minimize turf damage when applied correctly
Best for: Homeowners seeking a reliable, ready-to-use option for multiple weed species on warm-season lawns.
Caution: Follow drying and re-entry guidance to ensure safety for children and pets after application.
Ortho WeedClear Lawn Weed Killer Ready-To-Use with Comfort Wand
This ready-to-use formulation includes a Comfort Wand for precise spot treatments, focusing weed control on actively growing areas. Best for smaller lawns or targeted weed management without broader applications.
- Spot-treat weeds with an easy wand sprayer
- Kills listed lawn weeds without harming grass when used as directed
- Suitable for southern lawns with active weed growth
Best for: Small to mid-size lawns requiring precise, limited-area weed treatment.
Caution: Not ideal for large-scale weed control due to its spot-treat design; avoid over-treating to prevent turf stress.
Buying Guide
Key considerations to select the right product for St. Augustine and Bermuda lawns:
- Weed profile: Identify whether sedges (nutsedge), crabgrass, dandelion, or clover dominates your lawn to pick a product with targeted effectiveness.
- Turf compatibility: Confirm the product is labeled for St. Augustine or Bermuda grasses to reduce risk of turf injury.
- Application method: Hose-end sprayers, ready-to-use formulas, and gallon-sized concentrates offer different convenience levels and coverage.
- Area size: For large yards, consider gallons or products with broad coverage; for small areas, spot treatments or ready-to-use options may be more cost-effective.
- Safety and timing: Follow label directions on watering, drying times, and re-entry rules to ensure safety for children and pets after treatment.
- Environmental considerations: Look for products that minimize impact on desirable grasses and nearby ornamentals.
Frequently Asked Questions
- What weed killers are best for St. Augustine grass?
Look for products labeled specifically for St. Augustine or centipede grasses, such as atrazine-based formulations or broadleaf weed killers that specify safe use on these grasses. - Can I use these products on Bermuda grass as well?
Some products are suitable for Bermuda; always check the label for grass compatibility and avoid cross-application to sensitive grasses. - How soon will I see results after application?
Many products show visible effects within hours to a few days, depending on the weed species and weather conditions. - Is spot-treating less effective than treating the whole lawn?
Spot treatments are effective for targeted weeds, while whole-lawn treatments are better for widespread infestations. - Are there safety precautions for pets and children?
Yes. Always follow the label’s re-entry times and ensure treated areas are dry before allowing contact. - Should I rotate products to prevent weed resistance?
Rotating between herbicide modes and using best practices (timely application, proper rates) can help manage resistance risk.