Updated:May, 2026

10 Best Crabgrass Killer St Augustine Grass of 2026

Best Choice

9.9

Outstanding

Southern Ag

Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide, Light Tan

Why We Love It

One quart treats 3,720 sq ft
Controls Weeds in St. Augustine and Centipede Grasses
Package Weight: 1.021 kilograms
Package Dimensions: 5.842 L x 19.177 H x 12.954 W (centimeters)

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Why We Love It

One quart treats 3,720 sq ft
Controls Weeds in St. Augustine and Centipede Grasses
Package Weight: 1.021 kilograms
Package Dimensions: 5.842 L x 19.177 H x 12.954 W (centimeters)

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9.5

Excellent

Southern Ag

Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon

Main Highlights

Kills many broadleaf weeds
Also used in centipede grass
Provides suppression of crabgrass
Controls emerged weeds and weeds from seed

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Main Highlights

Kills many broadleaf weeds
Also used in centipede grass
Provides suppression of crabgrass
Controls emerged weeds and weeds from seed

9.5

Excellent

Agralawn

Agralawn Crabgrass Killer (2, Pounds)

Main Highlights

Use On: St. Augustine, Common Bermuda, Bahia and Centipede Grasses. When used properly, this product will cause very little reaction to the above listed grass types. This product is taken in through the leaves to wipe out weeds and roots.
Does Not Harm St Augustine Grass
Post-Emergent

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Main Highlights

Use On: St. Augustine, Common Bermuda, Bahia and Centipede Grasses. When used properly, this product will cause very little reaction to the above listed grass types. This product is taken in through the leaves to wipe out weeds and roots.
Does Not Harm St Augustine Grass
Post-Emergent

9.2

Excellent

BASF

BASF Drive XLR8 Crabgrass Killer for Lawn & Turf, Post Emergent Grassy & Broadleaf Weed Control, Active Ingredient Quinclorac, 30 Day Residual, Herbicide, Concentrate 64 Ounce

Main Highlights

Water-Based Formulation: Experience the power of our unique water-based formulation that ensures superior control and faster plant uptake, delivering results you can see quickly
Extended Residual Control: Enjoy up to 30 days of residual control, keeping your turfgrass free from troublesome weeds for longer periods and reducing the need for frequent applications; Rainfast in less than an hour
Broad-Spectrum Weed Control: Effectively targets a wide range of weeds, including crabgrass, foxtail, kikuyu grass, signal grass, torpedo grass, and key broadleaves like bindweed, clover, dandelion, black medic, and horseweed
Versatile Application: Perfect for residential lawns, golf courses, commercial properties, and other non-residential turfgrass sites. It is labeled for use on both warm-season and cool-season turf types, ensuring adaptability to various environments; See label for proper mixing instructions
USE AS INTENDED: Read, understand and follow label safety and application instructions; Follow proper storage and disposal instructions; NY can only be applied as a spot application; Proper PPE required long sleeve shirt, long pants, socks and shoes, chemical resistant gloves; See label for environmental hazards; State restrictions may apply

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Main Highlights

Water-Based Formulation: Experience the power of our unique water-based formulation that ensures superior control and faster plant uptake, delivering results you can see quickly
Extended Residual Control: Enjoy up to 30 days of residual control, keeping your turfgrass free from troublesome weeds for longer periods and reducing the need for frequent applications; Rainfast in less than an hour
Broad-Spectrum Weed Control: Effectively targets a wide range of weeds, including crabgrass, foxtail, kikuyu grass, signal grass, torpedo grass, and key broadleaves like bindweed, clover, dandelion, black medic, and horseweed
Versatile Application: Perfect for residential lawns, golf courses, commercial properties, and other non-residential turfgrass sites. It is labeled for use on both warm-season and cool-season turf types, ensuring adaptability to various environments; See label for proper mixing instructions
USE AS INTENDED: Read, understand and follow label safety and application instructions; Follow proper storage and disposal instructions; NY can only be applied as a spot application; Proper PPE required long sleeve shirt, long pants, socks and shoes, chemical resistant gloves; See label for environmental hazards; State restrictions may apply

9.0

Excellent

BioAdvanced

BioAdvanced All-In-One Lawn Weed and Crabgrass Killer I, Concentrate, 40 oz

Main Highlights

ALL-IN-ONE FORMULA: BioAdvanced's All-in-One formula kills listed lawn weeds and crabgrass without harming the lawn
KILLS TOUGH WEEDS: Control over 200 broadleaf weeds like dandelion, clover, and crabgrass using our powerful weed killer concentrate
DOWN TO THE ROOT: BioAdvanced All-In-One Lawn Weed and Crabgrass Killer I penetrates and removes tough listed weeds down to the root
RAINPROOF IN ONE HOUR: Our weed killer concentrate formula is rainproof in one hour, providing protection that wont wash away
EASY-TO-USE CONCENTRATE: Easily apply with our concentrated formula, perfect for targeting weeds in your lawn, and compatible with various grass types

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Main Highlights

ALL-IN-ONE FORMULA: BioAdvanced's All-in-One formula kills listed lawn weeds and crabgrass without harming the lawn
KILLS TOUGH WEEDS: Control over 200 broadleaf weeds like dandelion, clover, and crabgrass using our powerful weed killer concentrate
DOWN TO THE ROOT: BioAdvanced All-In-One Lawn Weed and Crabgrass Killer I penetrates and removes tough listed weeds down to the root
RAINPROOF IN ONE HOUR: Our weed killer concentrate formula is rainproof in one hour, providing protection that wont wash away
EASY-TO-USE CONCENTRATE: Easily apply with our concentrated formula, perfect for targeting weeds in your lawn, and compatible with various grass types

8.8

Very Good

Scotts

Scotts WeedEx Prevent with Halts - Crabgrass Preventer, Pre-Emergent Lawn Weed Killer, Up to 5,000 sq. ft. of Lawn Care, 10.06 lb.

Main Highlights

WEED PREVENTION: Scotts WeedEx Prevent with Halts is a weed control product that prevents the germination of listed lawn weeds so you can enjoy your lawn
APPLICATION: Apply this pre-emergent crabgrass and grass weed killer for lawns in early spring or in the fall; rain, snow, or freezing weather after application will not affect the performance of this lawn care product
GRASS TYPES: The pre-emergent weed preventer is for use on all grass types (with the exception of Dichondra or Bentgrass)
CRABGRASS PREVENTER: This crabgrass preventer for lawns also prevents germination of foxtail, spurge, barnyardgrass & more as listed in early spring all season & moss (not in California), Poa annua, henbit, corn speedwell, and chickweed in the fall
COVERAGE: One 10.06 lb. bag of Scotts WeedEx Prevent with Halts covers 5,000 sq. ft.

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Main Highlights

WEED PREVENTION: Scotts WeedEx Prevent with Halts is a weed control product that prevents the germination of listed lawn weeds so you can enjoy your lawn
APPLICATION: Apply this pre-emergent crabgrass and grass weed killer for lawns in early spring or in the fall; rain, snow, or freezing weather after application will not affect the performance of this lawn care product
GRASS TYPES: The pre-emergent weed preventer is for use on all grass types (with the exception of Dichondra or Bentgrass)
CRABGRASS PREVENTER: This crabgrass preventer for lawns also prevents germination of foxtail, spurge, barnyardgrass & more as listed in early spring all season & moss (not in California), Poa annua, henbit, corn speedwell, and chickweed in the fall
COVERAGE: One 10.06 lb. bag of Scotts WeedEx Prevent with Halts covers 5,000 sq. ft.

8.6

Very Good

Roundup

Roundup for Lawns Crabgrass Destroyer2, Tough Weed Killer, Kills Crabgrass, Foxtail, Goosegrass, Ready-to-Use, 64 oz.

Main Highlights

Roundup for Lawns Crabgrass Destroyer2 kills crabgrass and grassy weeds to the root
This weed killer for lawns is formulated to kill even the toughest crabgrass and grassy weeds
Apply this product to Kentucky bluegrass, fine fescue, perennial ryegrass and tall fescue
Apply this product to actively growing weeds (during the early growth stages for the best results), when daytime temperatures are between 45°F and 90°F
This 64 oz. container of Roundup for Lawns Crabgrass Destroyer2 is ready-to-use with a trigger sprayer

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Main Highlights

Roundup for Lawns Crabgrass Destroyer2 kills crabgrass and grassy weeds to the root
This weed killer for lawns is formulated to kill even the toughest crabgrass and grassy weeds
Apply this product to Kentucky bluegrass, fine fescue, perennial ryegrass and tall fescue
Apply this product to actively growing weeds (during the early growth stages for the best results), when daytime temperatures are between 45°F and 90°F
This 64 oz. container of Roundup for Lawns Crabgrass Destroyer2 is ready-to-use with a trigger sprayer

8.3

Very Good

BioAdvanced

BioAdvanced All-in-One Weed & Crabgrass Killer, Ready-To-Spray, 32 FOZ

Main Highlights

Kills over 200 of the most Common broad leaf weeds like dandelions and Clovers
This product won't harm you lawn when used as directed
Rainproof in 1 hour
Use in tank Sprayers, dial-n-spray and hose-end Sprayers
The fastest, easiest way to treat the entire lawn

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Main Highlights

Kills over 200 of the most Common broad leaf weeds like dandelions and Clovers
This product won't harm you lawn when used as directed
Rainproof in 1 hour
Use in tank Sprayers, dial-n-spray and hose-end Sprayers
The fastest, easiest way to treat the entire lawn

8.1

Very Good

Ortho

Ortho Weed B Gon Weed Killer for St. Augustinegrass Ready-To-Spray, 32 oz

Main Highlights

For use on St. Augustinegrass including Floratam
Kills 250+ listed weeds (See label for listed weeds.)
Wont harm the lawn Guaranteed (When used as directed.)
Rain-proof in 1 hour
Treats up to 2,500 sq. ft.

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Main Highlights

For use on St. Augustinegrass including Floratam
Kills 250+ listed weeds (See label for listed weeds.)
Wont harm the lawn Guaranteed (When used as directed.)
Rain-proof in 1 hour
Treats up to 2,500 sq. ft.

8.1

Very Good

Scotts

Scotts Turf Builder Triple Action1 - Weed Control, Lawn Weed Killer, Crabgrass Preventer, and Grass Fertilizer for Lawns, Covers 4,000 sq. ft., 11.31 lb.

Main Highlights

3-IN-1 FORMULA: Scotts Turf Builder Triple Action1 is a three-in-one lawn fertilizer and weed control formula that kills listed lawn weeds, prevents crabgrass, and feeds grass to build thick, green lawns
WHERE TO USE: This grass fertilizer, crabgrass preventer, and clover and dandelion killer for lawns is for use on Bahiagrass, Centipedegrass, Kentucky Bluegrass, Perennial Ryegrass, Bermudagrass, Tall Fescue, Fine Fescue, and Zoysiagrass
LAWN WEED CONTROL: This lawn care product is a weed killer for lawns that controls dandelion, clover, dollarweed, ground ivy, chickweed, plantain, henbit, English daisy, and other listed lawn weeds
CRABGRASS PREVENTER: This pre-emergent weed killer also prevents crabgrass for 4 months (will not kill existing crabgrass); stops other listed grassy weeds from invading your lawn
HOW TO USE: Apply to a wet lawn with a Scotts spreader, then water in after 24 hours; apply in early spring when dandelions are actively growing
COVERAGE: One 11.31 lb. bag of Scotts Turf Builder Triple Action1 treats 4,000 sq. ft.

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Main Highlights

3-IN-1 FORMULA: Scotts Turf Builder Triple Action1 is a three-in-one lawn fertilizer and weed control formula that kills listed lawn weeds, prevents crabgrass, and feeds grass to build thick, green lawns
WHERE TO USE: This grass fertilizer, crabgrass preventer, and clover and dandelion killer for lawns is for use on Bahiagrass, Centipedegrass, Kentucky Bluegrass, Perennial Ryegrass, Bermudagrass, Tall Fescue, Fine Fescue, and Zoysiagrass
LAWN WEED CONTROL: This lawn care product is a weed killer for lawns that controls dandelion, clover, dollarweed, ground ivy, chickweed, plantain, henbit, English daisy, and other listed lawn weeds
CRABGRASS PREVENTER: This pre-emergent weed killer also prevents crabgrass for 4 months (will not kill existing crabgrass); stops other listed grassy weeds from invading your lawn
HOW TO USE: Apply to a wet lawn with a Scotts spreader, then water in after 24 hours; apply in early spring when dandelions are actively growing
COVERAGE: One 11.31 lb. bag of Scotts Turf Builder Triple Action1 treats 4,000 sq. ft.

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