Best Weed Killers for Southern Lawns: Top Options by Need
The best weed killer for a Southern lawn depends on the grass type, weed, and whether you want quick spot treatment or longer-lasting prevention. Image Herbicide is a strong fit for Floratam St. Augustine lawns, while BioAdvanced Season Long targets listed weeds and offers up to six months of prevention. Ortho’s Comfort Wand suits small patches, and its hose-end products cover larger areas. Always confirm your turf and target weeds on the product label before applying.
| Product | Best For | Application |
|---|---|---|
| Image Herbicide for Southern Lawns | Floratam lawns | Ready-to-use spot treatment |
| BioAdvanced Season Long Weed Killer | Extended weed prevention | Granules |
| Ortho WeedClear with Comfort Wand | Small weed patches | Ready-to-use wand |
| Ortho WeedClear Ready-to-Spray3 | Listed Southern turf types | Hose-end sprayer |
| BioAdvanced 3-in-1 Weed & Feed | Weed control plus lawn feeding | Granules |
Image Herbicide For Southern Lawns
Best for: Homeowners with Floratam St. Augustine lawns who need a fast-acting liquid weed treatment. The listed product is designed for St. Augustine grass and specifically mentions Floratam lawns. Its features state that visible results can appear in hours and that it is intended to kill weeds without harming lawns when used as directed.
Choose this product when Southern-grass compatibility is your main concern and you want a ready-to-use lawn spray. It is selected for its explicit Floratam focus, a useful distinction because some other lawn weed killers exclude that grass variety. The listed information does not name specific weeds, so check the label to confirm it targets the weed in your yard. Apply only as directed.
BioAdvanced Season Long Weed Killer
Best for: Buyers who want listed weed control plus prevention rather than only a spot treatment. This granular product is described as killing broadleaf weeds such as dandelion, clover, chickweed, dollarweed, and henbit, while preventing listed grassy and broadleaf weeds—including crabgrass—for up to six months.
The listed coverage is up to 4,000 square feet. The product is identified for several Southern turf types, including St. Augustinegrass and Floratam, Bermudagrass, Centipedegrass, and Zoysiagrass. Choose it if extended prevention and coverage are priorities. Its weed-prevention claims apply to listed weeds only; review the label for the full weed list, application directions, and suitability for your specific lawn.
Ortho WeedClear With Comfort Wand
Best for: Spot-treating small, actively growing weeds without preparing a hose-end application. The one-gallon ready-to-use container includes a continuous-spray Comfort Wand. Listed weeds include dandelion, dollarweed, chickweed, and clover, and the product is described as lawn-safe when used as directed.
Choose this format for targeted applications around isolated weeds. The application instructions specify using it when daytime temperatures are below 90°F and are not expected to exceed 90°F for six hours. That temperature restriction is an important limitation: avoid treating outside the stated conditions, and check the label for other weather and lawn-use directions.
Ortho WeedClear Ready-to-Spray3
Best for: Treating a larger lawn area with a hose-end sprayer when the grass type appears on the listed turf selection. The product is described as controlling more than 250 listed weeds, with results in hours. Named examples include dandelion, dollarweed, chickweed, and clover.
Its listed Southern lawn types include Bahiagrass, Bermudagrass, Centipedegrass, Zoysiagrass, and several other grasses. A key caution is that the product is not for Floratam St. Augustinegrass. Choose it only if your grass matches the label; Floratam owners should consider a product explicitly identified for that variety instead. Confirm the complete weed list and directions before use.
BioAdvanced 3-in-1 Weed & Feed
Best for: Established Southern lawns that need listed weed control and fertilizer in one granular application. The product is formulated for Bermudagrass, St. Augustinegrass including Floratam, Centipedegrass, and Zoysiagrass. Its listed features include control of dandelion, dollarweed, clover, and other broadleaf weeds.
It is also described as preventing listed weeds and crabgrass for up to six months and feeding established turf for up to three months. Apply evenly with a broadcast or drop spreader, following the package directions. Temperature guidance is 50–90°F, with a lower limit of 85°F on Bermudagrass. Avoid choosing it if you only want to treat a few isolated weeds or do not need fertilizer.
Buying Guide: How To Choose Weed Killer For Southern Grass
Does the product match your grass type?
Start with your turf, not the weed killer’s general “lawn” claims. Southern lawns may include St. Augustine, Floratam, Bermuda, Centipede, or Zoysia. Product labels can have exclusions even within a grass family: Ortho WeedClear Ready-to-Spray3, for example, lists St. Augustinegrass except Floratam. Confirm the exact grass variety before applying.
Do you need spot treatment or whole-lawn coverage?
A ready-to-use wand is practical for small, isolated patches. A hose-end spray can suit broader liquid applications, while granular products can combine lawn coverage with weed prevention or feeding. Match the format to the area you need to treat, and follow label instructions for application and coverage.
Which weeds are you trying to control?
Check the label’s complete weed list before buying. Products may target different combinations of broadleaf weeds, sedges, and grassy weeds. A product’s general claim to kill weeds does not mean it controls every weed species. Use an option that lists your target weed and is approved for your turf.
When should you apply lawn weed killer?
Follow the product’s temperature and timing directions. Some treatments specify actively growing weeds or temperature limits. For example, the Ortho Comfort Wand product calls for daytime temperatures below 90°F under its stated conditions. Do not assume one product’s timing rules apply to another.
Frequently Asked Questions
What weed killer is suitable for Floratam St. Augustine grass?
Image Herbicide for Southern Lawns and BioAdvanced products listed for Floratam are options to investigate. Confirm the product label identifies your exact turf and follow all directions.
Can I use any lawn weed killer on St. Augustine grass?
No. Compatibility varies by product and sometimes by St. Augustine variety. Check for explicit label approval, especially if you have Floratam.
Which option is best for treating a few weeds?
A ready-to-use spot-treatment product with a wand, such as Ortho WeedClear with Comfort Wand, is designed for targeted applications.
Which products offer longer-lasting weed prevention?
The BioAdvanced Season Long product and BioAdvanced 3-in-1 list prevention for up to six months for specified weeds. Check each label for the covered weeds and application requirements.
Should I apply weed killer during hot weather?
Use the temperature guidance on the specific product label. Some products set temperature limits, and applying outside those directions may risk poor results or lawn injury.