Best Weed Control For Southern Lawns: 10 Options Compared

#1 · Best Overall

1. Image Herbicide Southern Lawns

• Weight: 2 lb
• Form: Liquid

Best for: Floratam-compatible post-emergent.

Why it ranks #1: Formulated specifically for southern lawns, it is stated to be safe on Floratam when used as directed and kills tough weeds down to the root.

Explicit compatibility with Floratam lawns makes Image Herbicide for Southern Lawns a useful option for owners of that named St. Augustine variety. The liquid is a fast-acting post-emergent treatment, with results stated to appear in hours when used as directed, and targets weeds rather than the lawn.

This concentrate is formulated for southern lawns and targets major broadleaf weeds down to the root, connecting its broadleaf focus with a lawn-specific use case. The directions call for measuring, pouring into a sprayer, and spraying evenly across the target area; that workflow suits buyers who can apply a liquid treatment precisely. Its stated Floratam safety when used as directed is a meaningful distinction for homeowners whose St. Augustine lawn variety is specifically named.

Skip it if you want control of weeds from seed as well as emerged weeds; Southern Ag Atrazine 006130 lists both forms of control for St. Augustine and centipede.

A strong fit for southern-lawn owners seeking post-emergent broadleaf control, especially those with Floratam. It is a liquid concentrate requiring measured preparation and even sprayer coverage, not a ready-to-spray lawn treatment.

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

#2 · Best St. Augustine Fit

2. Southern Ag Atrazine

• Weight: 2.1 lb
• Form: Spray

Best for: St. Augustine and centipede lawns.

Why it ranks #2: Made for St. Augustine and centipedegrass, it controls emerged weeds and weeds from seed; one quart treats 3,720 square feet.

A one-quart bottle treats 3,720 square feet, giving Southern Ag Atrazine a clear coverage reference for homeowners with St. Augustine or centipedegrass. The herbicide controls many common grassy and broadleaf weeds, including emerged weeds and weeds from seed, for a lawn-focused application.

The specified use on St. Augustine and centipedegrass helps buyers narrow the product to two named warm-season lawn types rather than treating it as a universal turf herbicide. Its control of emerged weeds and weeds from seed addresses both visible growth and germination, while the stated 3,720-square-foot coverage per quart helps plan an application area. Follow label directions and observe the listed precautions to limit contact with skin and eyes.

Skip it if you need treatment for Floratam or other listed southern lawn weeds; Image Herbicides 250262 specifically states it is safe on Floratam when used as directed.

Choose it when your lawn is St. Augustine or centipede and the stated coverage suits the area you plan to treat. Its grass-specific directions make it a poor fit for buyers seeking a general-purpose lawn herbicide.

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

#3 · Best Grass-Specific Control

3. Hi-Yield Atrazine

• Weight: 2.2 lb
• Form: Liquid

Best for: Atrazine for St. Augustine lawns.

Why it ranks #3: Targets weeds in St. Augustine and centipedegrass, including henbit, dollarweed, chickweed, and clover, with coverage up to 3,720 square feet.

Use on both dormant and growing St. Augustine and centipedegrass makes Hi-Yield Atrazine useful across more than one lawn season. This liquid concentrate treats up to 3,720 square feet per 32-ounce bottle and controls emerged weeds as well as weeds from seed.

The named grass compatibility narrows its fit to St. Augustine and centipedegrass, while the stated coverage gives a practical area reference for a bottle. Listed targets include henbit, dollarweed, chickweed, clover, and sandspur, and the product addresses both emerged weeds and weeds from seed. Users dilute according to label directions, which vary by lawn dimensions and grass type, then apply evenly with a sprayer or watering can.

Skip it if you want a ready-to-spray hose connection rather than diluted concentrate; Ortho Nutsedge Killer 9901910 uses a garden-hose sprayer.

Choose it for St. Augustine or centipedegrass when you want seasonal flexibility and control of emerged weeds and weeds from seed. Its concentrate requires label-based dilution and even application.

Listed on Amazon as: Hi-Yield (33430) Atrazine Weed Killer, 32 oz

#4 · Broadest Listed Coverage

4. BioAdvanced Lawn Weed Killer

• Weight: 2 lb
• Form: Spray

Best for: Broadleaf control for large lawns.

Why it ranks #4: Its concentrate covers up to 16,000 square feet and controls over 200 listed weeds; the product is formulated for southern and northern lawns.

Coverage up to 16,000 square feet per concentrate bottle gives BioAdvanced Lawn Weed Killer a clear role for larger lawns. Its broadleaf formula targets more than 200 listed weeds down to the root, with named examples including clover, dandelion, dollarweed, and chickweed.

The concentrate combines 2,4-D, mecoprop-p, and dicamba salts, while its listed selective use spans southern and northern lawn grasses including Bermuda, fescue, and Kentucky bluegrass. One application is stated to kill listed weeds without harming the lawn when used as directed, tying broad coverage to a single-step treatment. Buyers should match the lawn type and target weeds to the label, since the claims apply to listed weeds and grasses.

Skip it if you want an established-lawn treatment that also prevents listed weeds for up to six months; BioAdvanced 704040B includes that preventive claim.

A good fit for owners of larger northern or southern lawns seeking concentrate-based control of listed broadleaf weeds. Confirm that your grass and target weeds are included on the label before treating.

Listed on Amazon as: BioAdvanced Lawn Weed Killer Concentrate, Broadleaf Formula, 32 oz, Weed Killer Spray

#5 · Two-Treatment Plan

5. Celsius WG Herbicide

• Weight: 12.75 g
• Form: Granule

Best for: Two-treatment warm-season program.

Why it ranks #5: The listing describes two seasonal applications covering up to 4,000 square feet and control of 120-plus weeds, including crabgrass and dollarweed.

Two treatment packets covering up to 4,000 square feet give the Celsius WG two-pack a defined spring-and-fall schedule for warm-season weed control. The supplied program places one application as weeds emerge in early spring and the second in late summer or fall for a season-ending cleanup.

Each packet is specified for two gallons, with two applications per season, giving buyers a planned sequence from first green-up through dormancy rather than a single treatment. The listing names more than 120 weeds, including crabgrass, dollarweed, and clover, and identifies the product as Celsius WG herbicide. The stated total coverage is up to 4,000 square feet, so the two-packet schedule is most relevant when that area and seasonal cadence match the lawn.

Skip it if you need ready-to-spray hose application or coverage beyond 4,000 square feet; Ortho Nutsedge Killer 9901910 connects directly to a garden hose.

A fit for buyers seeking a scheduled warm-season program with one early-season and one late-season treatment. Match the stated 4,000-square-foot coverage to your lawn, and follow the packet-specific directions.

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

#6

6. Ortho Nutsedge Killer

• Weight: 2.4 lb
• Form: Spray

Best for: Ready-to-spray nutsedge control.

Why it ranks #6: Ready-to-spray treatment is listed for established warm-season turf and controls purple and yellow nutsedge, plus dollarweed and wild violet.

A hose-connected sprayer makes Ortho Nutsedge Killer a direct-application option for established lawns where nutsedge is the main concern. It selectively controls purple and yellow nutsedge alongside other listed weeds, and is labeled for well-established cool-season and warm-season turf grasses.

The ready-to-spray workflow connects to a garden hose, turns on the water, and sprays the target area evenly, avoiding the separate dilution step required by concentrates. Its listed targets include purple and yellow nutsedge, kyllinga, wild violet, dollarweed, and dandelion, while the label also describes control of over 50 listed weeds. Use is limited to well-established turf, though the listed grass range spans both cool- and warm-season types.

Skip it if you need a concentrated broadleaf treatment covering a stated 16,000 square feet; BioAdvanced 705100A lists that coverage and over 200 weeds.

A practical pick for established southern or northern turf where nutsedge and other listed weeds need targeted control. Its hose-sprayer workflow is convenient for direct application, but the lawn must be well established.

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. BioAdvanced Season Long Weed Control

• Weight: 2.3 lb
• Form: Oil

Best for: Six-month weed prevention.

Why it ranks #7: Its two-in-one formula kills existing listed weeds and prevents listed weeds for up to six months, with rainproof protection in one hour.

A two-in-one formula that kills existing listed weeds and prevents new ones for up to six months distinguishes BioAdvanced Season Long Weed Control. The ready-to-spray product combines post-emergent and pre-emergent action, giving established-lawn owners a single treatment approach for current weeds and prevention.

The ready-to-spray format avoids measuring and diluting a concentrate, and its stated rainproof protection begins after one hour. BioAdvanced says the product eliminates more than 200 listed broadleaf weeds and creates a preventative barrier when sprayed over the area, then watered in after at least an hour. Applications are listed for established lawns from spring through fall at 50 to 90 degrees Fahrenheit, so timing and lawn establishment matter.

Skip it if you need control of crabgrass germination rather than listed broadleaf weeds; Scotts Halts 49900 specifically prevents crabgrass and other listed grassy weeds.

A fit for owners of established lawns who want current broadleaf weeds treated alongside a listed preventive barrier. Check the temperature and timing limits, and note that the stated six-month protection applies to listed weeds.

Listed on Amazon as: BioAdvanced Season Long Weed Control For Lawns, Ready-to-Spray, 29 oz, 9,000 Sq Ft

#8

8. Southern Ag Amine 2,4-D

• Weight: 16 oz
• Form: Liquid

Best for: Broadleaf and woody-plant control.

Why it ranks #8: The liquid concentrate controls many broadleaf weeds and woody plants, but its listed uses span multiple sites rather than focusing on southern lawns.

A low application rate of 1 to 4 pints per acre sets Southern Ag Amine 2,4-D apart for buyers treating broadleaf weeds and woody plants across larger areas. Its liquid concentrate is labeled for certain grasses in lawns as well as pastures, rangeland, ditch banks, and fence lines.

The 3.8-pound-per-gallon 2,4-D acid equivalent concentrate uses a low-volatile amine form, while the listed 1-to-4-pint-per-acre rate gives acreage-minded users a defined basis for application. Its labeled range spans lawns, parks, golf courses, pastures, and non-crop sites, so it can serve more than a residential lawn. The label also cautions against spray overlap and drift to susceptible plants, making careful, targeted spraying an important part of the workflow.

Skip it if you need a product specifically listed for St. Augustine and centipede; Southern Ag Atrazine 006130 names those lawn grasses.

A practical fit for lawn owners and land managers targeting broadleaf weeds or woody plants across turf and adjacent listed sites. Its broad use range does not replace careful coverage: avoid overlap and drift near susceptible plants.

Listed on Amazon as: Southern Ag Amine 2,4-D WEED KILLER, 32oz – Quart

#9

9. Scotts Weed Control for Lawns

• Weight: 14.1 lb
• Form: Granule

Best for: Granular broadleaf weed coverage.

Why it ranks #9: Granules control over 200 listed broadleaf weeds, but the product must not be used on Floratam St. Augustinegrass or several other listed turf types.

Control of more than 200 listed weeds gives Scotts Weed Control for Lawns broad reach against common broadleaf intruders, including dandelion, clover, dollarweed, and chickweed. Its granular form suits lawn owners who prefer a spreadable product over a liquid spray, with contact action aimed down to the root.

The granular formulation provides a different application workflow from liquid concentrates, while the listed coverage of more than 200 weed types makes it relevant to varied broadleaf problems. Scotts says the product starts working on contact and kills listed weeds down to the root. However, its exclusions are central to lawn selection: it is not for Dichondra, carpetgrass, Floratam St. Augustinegrass, creeping bentgrass, or turf with desirable clovers.

Skip it if you have Floratam St. Augustine or want a liquid concentrate; Image Herbicides 250262 specifically states compatibility with Floratam when used as directed.

Consider it for lawns needing granular control across a broad list of listed weeds, provided the grass and planting mix are eligible. Avoid it on the explicitly excluded grasses or where desirable clovers are present.

Listed on Amazon as: Scotts Weed Control for Lawns, 14 lbs.

#10

10. Scotts Halts Crabgrass Preventer

• Weight: 9.6 lb
• Form: Granule

Best for: Season-long crabgrass prevention.

Why it ranks #10: This granule prevents crabgrass and other listed weeds but is not for newly seeded lawns and is a preventive rather than broad post-emergent treatment.

One spring application can prevent crabgrass all season, making Scotts Halts a prevention-first option for homeowners planning ahead of germination. Its granular formula also supports a fall application for listed winter weeds, so the seasonal timing determines which weed-control role it fills.

Applied to a dry lawn in early spring, the granules prevent germination of listed weeds including crabgrass, foxtail, spurge, and goosegrass. The fall timing targets winter weeds such as poa annua, henbit, and chickweed, while rain, snow, or freezing weather after application is stated not to affect performance. This is prevention rather than a treatment for established weeds, and newly seeded lawns have specific waiting restrictions.

Skip it if you need to kill visible broadleaf weeds rather than prevent germination; Scotts Weed Control for Lawns 49801C targets over 200 listed weeds.

Best suited to owners of established grass who can time a preventive application for spring or fall. It is not for newly seeded lawns, and its germination-control role differs from a post-emergent weed treatment.

Listed on Amazon as: Scotts Halts Crabgrass & Grassy Weed Preventer, 10.06 lbs.