Best Weed Killer For St Augustine And Bermuda

#1 · Best Overall

1. Image Southern Lawns Weed Killer

• Weight: 2 lb
• Form: Liquid

Best for: Ready-to-Spray Southern Lawn Care.

Why it ranks #1: Its listing names both St. Augustine and Bermuda, targets tough broadleaf weeds, and describes a ready-to-spray format for southern lawns.

A ready-to-spray format lets homeowners apply IMAGE Weed Killer for Southern Lawns evenly over their lawn without a separate mixing step. Its listed turf range includes St. Augustine, Bermuda, and Zoysia, and the formula is specifically described for Floratam lawns, making it an option for several southern-grass settings.

The sprayer format supports a straightforward application workflow: the product directions call for spraying evenly on the lawn. Visible results in hours offer a prompt indication after treatment, while the product description says it kills tough weeds down to the root. Its broadleaf control covers tough weeds in southern grasses, including St. Augustine, Bermuda, and Zoysia; read and follow the label before use.

Skip it if you want a granular or packet herbicide; Southern Ag Atrazine St. Augustine Weed Killer treats emerged weeds and weeds from seed.

A practical match for southern-lawn owners seeking a spray-on broadleaf treatment, including people with Floratam. The stated weed focus is broadleaf control, so choose another product if control of grassy weeds is your main need.

Listed on Amazon as: Image Herbicide Weed Killer for Southern Lawns, 32 Oz

#2 · Broad-Spectrum Control

2. Prime Source Celsius WG

• Weight: 18.14 g
• Form: Powder

Best for: Postemergent Celsius WG Packet.

Why it ranks #2: Celsius is described for St. Augustine and Bermudagrass and controls more than 120 annual and perennial broadleaf weeds and grasses.

A small easy-mix packet gives this Envu Celsius WG postemergent herbicide a compact format for warm-season turf weed control. Its description names St. Augustinegrass and Bermudagrass among the turf types and says the three active ingredients provide broad-spectrum control of more than 120 annual and perennial broadleaf weeds and grasses.

The powder form and included easy-mix packet support a mixing workflow rather than direct ready-to-spray use, so buyers should plan for preparation according to the label. As a postemergent foliar-applied herbicide, it is aimed at weeds already present on the foliage. The listing names St. Augustinegrass and Bermudagrass as warm-season turf examples, while its broad spectrum covers annual and perennial weeds; follow label directions for application.

Skip it if you want an application with no mixing step; IMAGE Weed Killer for Southern Lawns is ready to spray.

This packet suits a buyer comfortable mixing a postemergent product for listed warm-season turf, including St. Augustine and Bermuda. It is not a ready-to-spray choice, so account for the preparation step and follow its label.

Listed on Amazon as: Prime Source Celsius WG – 0.226 oz Easy Mix Packet-Post Emerge Weed Control

#3 · Two-Treatment Pack

3. Bug And Blade Celsius WG

• Weight: 12.75 g
• Form: Granule

Best for: Two-Treatment Warm-Season Program.

Why it ranks #3: The listing identifies Celsius WG and claims a two-pack covers up to 4,000 square feet, with crabgrass, dollarweed, and clover among targets.

Two Celsius WG treatments in one pack provide a stated spring-and-fall cycle for warm-season weed control, covering up to 4,000 square feet. The packet schedule separates early-season weed emergence from a late-summer or fall cleanup, giving homeowners a defined two-application plan through the growing season.

Each packet is described as mixing into two gallons, with two applications per season. That schedule lets a buyer plan an early spring treatment as weeds emerge and reserve the second for late summer or fall, rather than using both applications at once. The listing names more than 120 weeds, including crabgrass, dollarweed, and clover. Its seasonal coverage claim is up to 4,000 square feet; follow the supplied product directions.

Skip it if you need a ready-to-spray lawn bottle; IMAGE Weed Killer for Southern Lawns uses a sprayer format and lists southern turf grasses.

This fits a buyer planning two Celsius WG treatments across spring and fall and whose treated area fits the stated coverage. Check the product directions for turf and application requirements before putting it into a St. Augustine or Bermuda program.

Listed on Amazon as: Celsius WG Herbicide 2-Pack with Bug And Blade Weed ID Card

#4

4. BioAdvanced Southern Weed Killer

• Weight: 9.6 lb
• Form: Spray

Best for: Southern Turf, Except Floratam.

Why it ranks #4: It lists St. Augustine and Bermudagrass compatibility and more than 200 listed weeds, but explicitly excludes Floratam St. Augustinegrass.

A two-gallon ready-to-use pack targets southern lawn weeds while listing St. Augustine, centipede, Zoysia, and Bermuda as usable grass types. Its critical exception is Floratam St. Augustine, which the product specifically says not to use on, making grass-variety identification central to choosing it.

The ready-to-use spray format avoids a concentrate-mixing step, and its selective formula is described as killing listed weeds down to the root. The product lists more than 200 weeds, including dandelion, dollarweed, clover, and chickweed, for a broad southern-lawn target set. Its turf compatibility includes St. Augustine and Bermuda but excludes Floratam, so identify the St. Augustine variety before applying and follow label directions.

Skip it if you have Floratam St. Augustine; IMAGE Weed Killer for Southern Lawns is specifically described for Floratam lawns.

Choose this two-pack for listed southern grasses, including Bermuda and non-Floratam St. Augustine, when ready-to-use application appeals. The Floratam exclusion is decisive; identify your St. Augustine variety before treating the lawn.

Listed on Amazon as: BioAdvanced Southern Weed Killer for Lawns, Ready-to-Use, 1 Gal (Pack of 2)

#5 · Southern Turf Focus

5. SpeedZone Southern Broadleaf Herbicide

• Form: Liquid

Best for: Southern Turf Broadleaf Treatment.

Why it ranks #5: This 2.5-gallon product is described for sensitive southern turfgrasses and fast broadleaf control, including dollarweed, clover, and spurge.

SpeedZone Southern is described for fast broadleaf weed control in sensitive southern turfgrasses, with dollarweed, creeping beggarweed, clover, plantain, ground ivy, and spurge among its named targets. That specific southern-turf focus makes it relevant to owners prioritizing broadleaf weeds rather than a general weed-control claim.

The product description reports a fast-acting response with visible activity and names several difficult southern-turf weeds, giving buyers concrete targets to compare with their lawn problem. Its liquid form is supplied as a 2.5-gallon product, a substantial quantity for planning treatment. The available listing does not name specific compatible grass species or a coverage rate, so check the label before applying to St. Augustine or Bermuda and follow its safety precautions.

Skip it if you need grass-specific compatibility stated in the listing; Southern Ag Atrazine 006130 explicitly names St. Augustine and centipede.

A candidate for buyers focused on named broadleaf weeds in southern turf, especially dollarweed or creeping beggarweed. Since the listing does not identify St. Augustine or Bermuda by name, verify turf compatibility and coverage on its label first.

Listed on Amazon as: SpeedZone Southern Broadleaf Herbicide for Southern Turf-2.5 Gallon 715387 Y

#6 · Nutsedge Specialist

6. Ortho Nutsedge Killer

• Weight: 2.4 lb
• Form: Spray

Best for: Hose-End Nutsedge and Broadleaf Control.

Why it ranks #6: It is labeled for well-established warm-season turf and lists nutsedge, dollarweed, and other weeds, but its focus is selective sedge control.

A garden-hose sprayer gives Ortho Nutsedge Killer a direct ready-to-spray workflow: connect the hose, turn on water, and apply evenly. It is listed for well-established warm-season turf and targets purple and yellow nutsedge, kyllinga, wild violet, dollarweed, and other listed weeds.

The hose connection avoids a separate tank-sprayer mixing workflow, which can simplify application over a lawn. Its stated use includes well-established warm-season grasses, and its selective control covers listed sedges and broadleaf weeds, including wild violet and dollarweed. The instructions rule out newly planted, plugged, or sodded turf, so this is for established lawns rather than fresh installations; keep children and pets away until sprays dry.

Skip it if you are treating fresh sod or plugs; Southern Ag 006130 lists St. Augustine and centipede use without that establishment restriction in its supplied facts.

This suits an owner with established St. Augustine or Bermuda who wants hose-end application against listed nutsedge and broadleaf weeds. Do not use it on newly planted, plugged, or sodded turf, and follow the label.

Listed on Amazon as: Ortho Nutsedge Killer for Lawns Ready-To-Spray, Controls Over 50 Listed Weeds, For Use on Northern and Southern Turf Grasses, 32 fl. oz

#7

7. Southern Ag Atrazine 32 oz

• Weight: 2.1 lb
• Form: Spray

Best for: St. Augustine and Centipede Lawns.

Why it ranks #7: Atrazine is specified for St. Augustine and centipede, treats 3,720 square feet per quart, and controls emerged weeds and weeds from seed.

Coverage for 3,720 square feet per quart gives this Southern Ag atrazine herbicide a clear role in treating a substantial St. Augustine or centipede lawn. Its listed activity spans emerged weeds and weeds from seed, offering homeowners a single product for both visible growth and new weed pressure.

The label identifies St. Augustine and centipede as the intended lawn grasses, which makes the turf fit specific rather than universal. Control of many common broadleaf and grassy weeds, plus suppression of crabgrass, broadens its purpose beyond a single weed type. Because it addresses emerged weeds and weeds from seed, it can suit a lawn with current growth and ongoing emergence; follow label directions for application and safety.

Skip it if you need a ready-to-spray bottle; IMAGE Weed Killer for Southern Lawns is supplied as a sprayer product.

Choose this for a St. Augustine or centipede lawn where broadleaf and grassy weeds, including crabgrass suppression, are priorities. Its stated use is limited to those turf types, so it is not the fit for other lawn grasses.

Listed on Amazon as: Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide, Light Tan

#8

8. Southern Ag Atrazine 1 Gallon

• Weight: 4.3 oz
• Form: Spray

Best for: Gallon-Size Southern Ag Atrazine.

Why it ranks #8: This gallon-format atrazine controls emerged weeds and weeds from seed in St. Augustine and is also listed for centipede grass.

The one-gallon size makes this Southern Ag atrazine herbicide a straightforward choice for buyers seeking a larger supply of its St. Augustine grass weed-control formula. Its listed uses include centipede grass, while its weed activity includes emerged growth, weeds from seed, broadleaf weeds, and crabgrass suppression.

The product’s stated fit is St. Augustine and centipede turf, which helps narrow the selection for southern lawns rather than suggesting universal grass compatibility. It kills many broadleaf weeds, controls emerged weeds and weeds from seed, and provides crabgrass suppression. Those functions can address existing weeds as well as new emergence, but the listing does not give a treatment-area figure for this gallon, so plan application from the label directions.

Skip it if you want a stated per-quart area figure; Southern Ag 006130 Atrazine St. Augustine Weed Killer lists 3,720 square feet per quart.

Consider this gallon option for a St. Augustine or centipede lawn needing Southern Ag atrazine’s listed broadleaf and emerged-weed control. The listing provides no coverage figure for this size, so use the label to plan the treatment area.

Listed on Amazon as: Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon

#9

9. Spectracide Large Plot Weed Stop

• Weight: 9 lb
• Form: Liquid

Best for: Large Southern Lawn Areas.

Why it ranks #9: Its concentrate claims coverage up to 42,500 square feet of southern grasses and control of more than 200 weeds, but does not name either target grass.

Coverage up to 42,500 square feet on southern grasses makes Spectracide Large Plot Weed Stop a concentrate for treating extensive lawns. It kills more than 200 listed weed types, and the product’s rainproof claim begins six hours after application, giving large-area users a defined window before rainfall or watering.

This concentrate must be mixed with water as directed and applied using a tank sprayer, so it suits owners prepared to manage dilution and spray equipment. Its stated southern-grass coverage reaches 42,500 square feet, while the six-hour rainproof period helps set application timing around watering or rainfall. The product also warns against application above 85°F because grass damage may occur; observe its temperature guidance and label directions.

Skip it if you need a ready-to-spray bottle without tank-sprayer mixing; Ortho Nutsedge Killer for Lawns Ready-To-Spray connects to a garden hose.

A fit for owners treating large southern-grass areas who can mix concentrate and use a tank sprayer. The 85°F ceiling is a real scheduling boundary, so this is not suited to application during hotter conditions.

Listed on Amazon as: Spectracide Large Plot Weed Stop For Lawns Concentrate, 1 Gal

#10

10. Syngenta Tenacity Turf Herbicide

• Weight: 8 oz
• Form: Liquid

Best for: Pre- and Post-Emergence Weed Control.

Why it ranks #10: Tenacity targets a broad range of weeds and offers pre- and post-emergence control, but the listing does not establish compatibility with St. Augustine or Bermuda.

Tenacity combines pre-emergence and post-emergence systemic activity, allowing treatment before weeds emerge or after they are visible. Its listed targets include crabgrass, clover, dandelion, and yellow nutsedge, among many others, giving turf managers a named weed list and two points in the weed-growth cycle to consider.

The pre-emergent action is described as weeds absorbing the product during emergence from soil, while the post-emergent claim covers weeds already present. That dual timing can support a planned weed-control approach rather than a single-stage response. The listing identifies a 40% mesotrione active ingredient and numerous target weeds, but does not specify St. Augustine or Bermuda compatibility; verify the label’s turf-use directions before choosing it for either lawn.

Skip it if you need explicitly listed St. Augustine and Bermuda use; Envu Celsius WG names both warm-season turf types.

This may suit a turf manager seeking pre- and post-emergence options against its listed weeds. For a St. Augustine or Bermuda roundup, the key boundary is that this listing does not establish either grass as compatible; check the label first.

Listed on Amazon as: Tenacity Turf Herbicide – 8 ounces (Packaging may vary)