How to Kill Creeping Charlie (Ground Ivy) in Kentucky Bluegrass Without Hurting Your Lawn
Direct Agronomic Answer
To selectively kill Creeping Charlie (Ground Ivy) in Kentucky Bluegrass without damaging your turf, apply Tenacity (Mesotrione 40%), SpeedZone Lawn Weed Killer (2,4-D 28.57%, Mecoprop-p 5.88%, Dicamba 1.71%, Carfentrazone-ethyl 0.62%) when air temperatures are between 55°F and 85°F.
Creeping Charlie develops a thick waxy cuticle in summer that repels water-based 2,4-D sprays. Triclopyr ester penetrates the waxy leaf barrier and moves systemically through the square stolon network, while also eliminating co-occurring Wild Violet in shaded cool-season lawns.
1. Labeled Safe Herbicides That Kill Creeping Charlie (Ground Ivy) in Kentucky Bluegrass
| Recommended Product | Active Ingredient & Group | Application Temp (°F) | Surfactant & Mixing Protocol | Where to Buy |
|---|---|---|---|---|
| Tenacity EPA Reg. 100-1267 |
Mesotrione 40% Group 27 (HPPD Inhibitor) |
55°F – 85°F Rainfast: 6h |
Always apply with Non-Ionic Surfactant (NIS) at 1 tsp (5 mL) per gallon of water for post-emergent applications. Causes temporary white bleaching on susceptible weeds and turf tips. | Check Price at DoMyOwn View on Amazon |
| SpeedZone Lawn Weed Killer EPA Reg. 2217-833 |
2,4-D 28.57%, Mecoprop-p 5.88%, Dicamba 1.71%, Carfentrazone-ethyl 0.62% Group 4 + Group 14 (Synthetic Auxins + PPO Inhibitor) |
50°F – 85°F Rainfast: 3h |
Do NOT add surfactant. Adding NIS or MSO increases ester volatility and causes severe contact burn on desirable cool-season turf. | Check Price at DoMyOwn View on Amazon |
| TZone SE EPA Reg. 2217-920 |
Triclopyr 7.72%, 2,4-D 29.36%, Dicamba 2.22%, Sulfentrazone 0.66% Group 4 + Group 14 (Pyridine Auxin + Phenoxy + PPO Inhibitor) |
50°F – 80°F Rainfast: 3h |
Do NOT mix with surfactant when temperatures exceed 75°F. In cool spring or fall conditions (55°F–70°F), 0.5 tsp NIS per gallon improves waxy leaf penetration on Wild Violet. | Check Price at DoMyOwn View on Amazon |
| Pylex Herbicide EPA Reg. 7969-327 |
Topramezone 29.7% Group 27 (HPPD Inhibitor / Pyrazolone) |
55°F – 85°F Rainfast: 1h |
Must be applied with Methylated Seed Oil (MSO) at 1 to 1.5 tsp per gallon of water. Tank-mixing with Triclopyr Ester reduces white bleaching and speeds up Bermudagrass and Goosegrass mortality. | Check Price at DoMyOwn View on Amazon |
3. Optimal Seasonal Timing & Temperature Thresholds
The primary kill window is mid-to-late autumn (October through November, 50°F–70°F) after the first light frost, with a secondary window in mid-spring when purple flowers are in full bloom.
During autumn, Creeping Charlie translocates sugars directly into its stolon nodes to survive winter, pulling Triclopyr deep into the root system. Spraying in mid-summer above 80°F causes Triclopyr volatilization and results in rapid stolon regrowth within 3 weeks.
4. Diagnostic Checklist: Confirm It Is Creeping Charlie (Ground Ivy) Before Spraying
- Round to kidney-shaped leaves with scalloped (crenate) edges arranged opposite each other
- Square-sided stems (mint family) that creep aggressively along the soil surface and emit a pungent minty odor when crushed
- Small funnel-shaped violet-blue flowers with purple speckles blooming in leaf axils during spring
Not 100% sure? Use our AI Photo Weed Scanner or review the full Creeping Charlie (Ground Ivy) Botanical Profile.