Weed killer for St Augustine grass is essential for maintaining a lush and healthy lawn. In 2025, homeowners will find a variety of effective options designed specifically for this popular grass type. These products not only target common weeds but also ensure the safety and vitality of St Augustine grass, promoting robust growth without causing harm. From selective herbicides to natural solutions, the best weed killers will help you achieve a pristine lawn while preserving the unique characteristics of St Augustine grass.
Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide, Light Tan
- 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)
$17.88
SALE
−$1.00
Ortho WeedClear Weed Killer for Lawns Ready-To-Spray: Treats up to 16,000 sq. ft., Won't Harm Grass (When Used as Directed), Kills Dandelion & Clover, 32 oz.
- Use Ortho WeedClear Weed Killer for Lawns Ready-To-Spray to kill weeds down to the root, without harming your lawn (when used as directed); you'll see visible results in hours
- KILLS WEEDS: This lawn weed killer kills over 250 common weeds, including dandelions, clover, poison ivy, chickweed, and dollarweed (see product label for complete weed list)
- LAWN FRIENDLY: It contains three proven ingredients that target common lawn weeds, so it won’t harm your grass (when used as directed)
- RESULTS YOU CAN SEE: Visible results in hours; rainproof in 1 hour upon drying; people and pets may enter the treated area after the spray has dried
- EASY TO USE: To apply, connect your garden hose to the sprayer and set the nozzle to your desired setting
$14.99
Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon
- Kills many broadleaf weeds
- Also used in centipede grass
- Provides suppression of crabgrass
- Controls emerged weeds and weeds from seed
$39.90
Spectracide Weed Stop For Lawns For St. Augustine & Centipede Lawns Concentrate, Ready-to-Spray, 32-Ounce, 6-Pack, Clear
- KILLS WEEDS, NOT THE LAWN: Won’t harm lawns when used as directed – controls both emerged weeds and weeds from seeds.
- WITH ATRAZINE: For lawn weed control in all St.
- Augustinegrass varieties and centipedegrass.
- CONTROLS TOUGH WEEDS: Kills established weeds, including dollarweed, sandspur and Florida betony.
- HOSE-END CONCENTRATE: QuickFlipTM hose-end sprayer activates spray at the flip of a switch.
$124.99
SALE
−$6.02
Scotts Turf Builder Bonus S Southern Weed & Feed2, 5,000 sq. ft.
- Scotts Turf Builder Bonus S Southern Weed & Feed2 weed killer plus fertilizer kills existing weeds as listed, and feeds grass to crowd out future weeds and build strong, deep roots
- Southern weed and feed controls dollarweed, clover, dandelion, chickweed, oxalis, henbit, purslane, and more as listed
- Apply to a dry lawn when grass and weeds are actively growing; product must be watered in immediately after application
- For use on St. Augustinegrass (including Floratam), Centipedegrass, Zoysiagrass, and Carpetgrass
- One 17.24 lb. bag of Scotts Turf Builder Bonus S Southern Weed & Feed2 covers 5,000 sq. ft.
$29.97
SALE
−$2.19
Hi-Yield Atrazine Weed Killer
- Atrazine - 4.00%
- Weeds Controlled or Suppressed: Annual Bluegrass (Poa annua), Chickweed (Commonand Mouseear),
- For use in St. Augustine and Centipede grass
- Henbit, Moneywort, Pennywort (Dollarweed), Chickweed (Common and Mouseear), Spurge, Annual
$15.86
SALE
−$4.30
BioAdvanced 3-in-1 Weed and Feed for Southern Lawns, Granules, 10 lb, Outdoor Weed Killer, Lawn Fertilizer
- SOUTHERN LAWNS: Specially formulated for Southern lawns like Bermudagrass, St. Augustinegrass (including Floratam), and more, this grass fertilizer for lawn provides care and acts as a weed killer for lawns
- 6-MONTH PROTECTION: Delivers up to 6 months of weed prevention, stopping listed broadleaf and grassy weeds, including crabgrass
- WEED KILLER: Kills listed weeds like dandelion, dollarweed, and clover, serving as a reliable weed and feed for lawns to keep your lawn healthy and maintain its beauty
- LAWN FERTILIZER: This lawn fertilizer and weed control product feeds, greens, and strengthens your lawn, helping it remain lush throughout the season
- EASY APPLICATION: Use with a broadcast or drop spreader to apply this weed and feed lawn fertilizer, managing your lawn care routine with ease and maximum results
$26.69
SALE
−$9.80
Scotts Liquid Turf Builder with Plus 2 Weed Control, Liquid Weed Killer and Fertilizer, 32 fl. oz.
- Scotts Liquid Turf Builder with Plus 2 Weed Control kills listed weeds while giving your lawn a quick boost of nitrogen
- Liquid weed killer plus fertilizer controls dandelion, clover, ground ivy, henbit, chickweed, plantain, poison ivy, and other broadleaf weeds as listed
- Apply this ready-to-spray weed and feed when weeds are actively growing
- This lawn care product is for use on Bluegrass, Fescue, Ryegrass, Bahiagrass, Common Bermudagrass, Centipedegrass, and Zoysiagrass
- One 32 fl. oz. container of Scotts Liquid Turf Builder with Plus 2 Weed Control provides coverage of 6,000 sq. ft. for warm season lawns and 4,000 sq. ft. for cool season lawns
$17.69
Roundup for Lawns₆ Ready-to-Spray (Southern) - All-in-One Weed Killer for Lawns, 32 oz.
- Roundup For Lawns₆ is ready-to-spray and contains multiple active ingredients to provide excellent broadleaf weed control in established warm-season and cool-season turfgrasses
- Kills 93 types of weeds, including dollarweed, dandelion, clover, yellow nutsedge, poison ivy, chickweed, oxalis, and purslane (see inside booklet for weed list)
- Starts working immediately and is rainproof in 4 hours
- Use on listed Southern grasses, including St. Augustinegrass (including Floratam), Bermudagrass, Centipedegrass, Bahiagrass, and Zoysiagrass
- Shake well, connect the Roundup For Lawns₆ sprayer to a garden hose and turn on the water to treat up to 6,000 sq. ft.
$19.97
SALE
−$3.52
Scotts Turf Builder Southern Triple Action - Weed Killer, Fire Ant Preventer, Lawn Fertilizer, 8,000 sq. ft., 26.64 lbs.
- Scotts Turf Builder Southern Triple Action is a 3-in-1 formula for Southern grass types that kills listed weeds, prevents and kills fire ants, and feeds and strengthens your lawn against heat and drought
- Prevents and kills fire ants for up to 6 months, and prevents armyworms, fleas, mole crickets, chinch bugs, sod webworms, and ticks
- Apply combination weed killer, insect preventer, and fertilizer to St. Augustinegrass (including Floratam), Centipedegrass, Zoysiagrass, and Carpetgrass
- Built-in lawn weed killer controls dollarweed, dandelion, clover, oxalis, plantain, chickweed, and henbit
- One 26.64 lb. bag of Scotts Turf Builder Southern Triple Action covers 8,000 sq. ft
$64.97
Last update on 2025-05-26 / Affiliate links / Images from Amazon Product Advertising API