A selective broadleaf herbicide kills clover while leaving your grass standing, when you choose the right active ingredient for your turf.
The honest answer to what herbicide kills clover and not grass is a selective post-emergent broadleaf product labeled for lawns. These formulas target the biology of broadleaf weeds like clover while leaving your turfgrass’s growth pattern untouched. The catch is that “one-size-fits-all” doesn’t exist here. The best pick depends on your grass species—cool-season or warm-season—and the specific clover you’re fighting. Here’s what the experts actually recommend.
The Active Ingredients That Kill Clover, Ranked by Evidence
Extension services agree that certain active ingredients control clover far better than others. If you want something stronger than the standard 2,4-D mix, clopyralid beats 2,4-D on clover specifically, per UMass Extension.
The table below breaks down the leading options so you can match one to your lawn.
| Active Ingredient | Why It Works for Clover | Best For |
|---|---|---|
| Triclopyr | Most effective against clover and woodsorrel per Rutgers | Tough infestations, cool-season turf |
| Clopyralid | More effective on clover than 2,4-D per UMass | Stubborn clover patches |
| Quinclorac | Accessible white clover control per Rutgers and MSU | White clover, warm-season lawns |
| Dicamba + 2,4-D + MCPP | Standard broadleaf mix found in most lawn products | General clover and dandelion control |
| Carfentrazone / Sulfentrazone | Very effective in summer per MSU | Hot-weather applications |
| FeHEDTA (chelated iron) | Damages clover via iron toxicity, spares grass | Organic-leaning or lower-toxicity needs |
How to Apply It Right the First Time
Start by identifying your grass type. Herbicide choice hinges on whether you have cool-season turf (fescue, bluegrass, ryegrass) or warm-season turf (Bermuda, zoysia). Rutgers frames its triclopyr guidance for cool-season lawns, so verify the label before spraying warm-season grass.
Spot-treat whenever possible. Use a pump sprayer for even coverage and avoid drenching the area.
Timing matters more than most people think. Apply when clover is actively growing and relatively small—late spring to early summer works best in most regions. Choose a calm day with no rain in the forecast for at least 48 hours to prevent drift and wash-off. One application often isn’t enough; plan for a second treatment three to four weeks later if green leaves reappear.
What Will Kill Your Grass Along With Clover
Glyphosate is the biggest mistake homeowners make. It’s non-selective, meaning it kills everything green it touches, including your turf. Skip it entirely for lawn clover control.
2,4-D alone can damage clover, but it’s also the standard weed-killer ingredient that can stress certain grass species if overapplied. Follow the label’s rate exactly. And don’t assume every “weed killer” works the same—grass-specific killers (like those for crabgrass) won’t touch clover, and non-selective products will nuke your lawn.
One more caution: if clover is the plant you WANT to keep—say, in a food plot—use 2,4-DB instead of standard 2,4-D. The regular formulation will harm desirable clover along with the broadleaf weeds.
FAQs
How long until I see clover dying?
Don’t judge the product too early—the herbicide needs time to translocate through the plant’s root system.
Can I overseed after spraying for clover?
The residual herbicide can prevent new grass seed from germinating. Check your specific product label for the exact waiting period, since some active ingredients persist longer in the soil than others.
Is iron-based herbicide as effective as chemical options?
They’re a solid pick if you want lower toxicity around pets and kids, but established clover patches may need repeated applications.
References & Sources
- UMass Extension. “Clopyralid Herbicide Information.” Confirms clopyralid’s effectiveness on clover versus 2,4-D.
- Michigan State University Extension. “Herbicide Recommendations for Controlling Clover.” Details carfentrazone and sulfentrazone for summer clover control.
- Penn State Extension. “Lawn and Turfgrass Weeds: White Clover.” Names dicamba, clopyralid, fluroxypyr, and quinclorac for white clover.