Post-Emergent Herbicides
Post-emergent herbicides kill weeds that have already germinated and are actively growing. Apply when air temperatures are 55-85°F, wind is below 10 mph, and no rain is forecast for 24 hours.
Post-Emergent Comparison
| Product | Active Ingredient | Tier | Best For | Cost | |
|---|---|---|---|---|---|
| Image Kills Nutsedge (Imazaquin) | Imazaquin | Strong Pick | Nutsedge, crabgrass, and broadleaf weeds in warm-season lawns | $15-25 per bottle | Found at: Amazon · DoMyOwn |
| Celsius WG (Thiencarbazone + Iodosulfuron + Dicamba) | Thiencarbazone-methyl + Iodosulfuron-methyl-sodium + Dicamba | Premium | Broad-spectrum weed control in warm-season lawns — handles both broadleaf and grassy weeds | $80-120 for 10 oz | Found at: Amazon · DoMyOwn |
| Quinclorac (Drive XLR8 / Quintessential) | Quinclorac | Community Gold | Killing emerged crabgrass at any growth stage, plus some broadleaf weeds | $30-60 per bottle | Found at: Amazon · DoMyOwn |
| Sedgehammer / Empero (Halosulfuron-methyl) | Halosulfuron-methyl | Community Gold | Yellow nutsedge and purple nutsedge control | $15-25 per packet; plan on 2-3 packets per season | Found at: Amazon · DoMyOwn |
| Spectracide Weed Stop for Lawns + Crabgrass (Atrazine) | Atrazine | Budget | Broadleaf and crabgrass control in centipede and St. Augustine lawns | $15-25 per bottle | Found at: Amazon · DoMyOwn |
| Triclopyr (Crossbow / Ortho Weed B Gon Chickweed, Clover & Oxalis Killer) | Triclopyr | Community Gold | Creeping charlie (ground ivy), clover, wild violet, oxalis, English ivy | $15-30 per bottle | Found at: Amazon · DoMyOwn |
| Trimec / Triad Select (3-Way Broadleaf Herbicide) | 2,4-D + Dicamba + Mecoprop | Community Gold | Dandelions, clover, plantain, chickweed, and most common broadleaf weeds | $20-40 per quart | Found at: Amazon · DoMyOwn |
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Individual Product Reviews
Imazaquin
Nutsedge, crabgrass, and broadleaf weeds in warm-season lawns
$15-25 per bottle
Thiencarbazone-methyl + Iodosulfuron-methyl-sodium + Dicamba
Broad-spectrum weed control in warm-season lawns — handles both broadleaf and grassy weeds
$80-120 for 10 oz
Quinclorac
Killing emerged crabgrass at any growth stage, plus some broadleaf weeds
$30-60 per bottle
Halosulfuron-methyl
Yellow nutsedge and purple nutsedge control
$15-25 per packet; plan on 2-3 packets per season
Atrazine
Broadleaf and crabgrass control in centipede and St. Augustine lawns
$15-25 per bottle
Triclopyr
Creeping charlie (ground ivy), clover, wild violet, oxalis, English ivy
$15-30 per bottle
2,4-D + Dicamba + Mecoprop
Dandelions, clover, plantain, chickweed, and most common broadleaf weeds
$20-40 per quart
Affiliate disclosure: we may earn from qualifying purchases.