How to Kill Curly Dock in Kentucky Bluegrass Without Hurting Your Lawn
Direct Agronomic Answer
To selectively kill Curly Dock in Kentucky Bluegrass without damaging your turf, apply SpeedZone Lawn Weed Killer (2,4-D 28.57%, Mecoprop-p 5.88%, Dicamba 1.71%, Carfentrazone-ethyl 0.62%), TZone SE (Triclopyr 7.72%, 2,4-D 29.36%, Dicamba 2.22%, Sulfentrazone 0.66%) when air temperatures are between 50°F and 85°F.
Curly dock has a stout taproot. Systemic phenoxy herbicides travel down into the root crown within 48 to 72 hours.
1. Labeled Safe Herbicides That Kill Curly Dock in Kentucky Bluegrass
| Recommended Product | Active Ingredient & Group | Application Temp (°F) | Surfactant & Mixing Protocol | Where to Buy |
|---|---|---|---|---|
| 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 |
3. Optimal Seasonal Timing & Temperature Thresholds
Spray in autumn during the rosette stage or early spring before tall flower stalks bolt.
Mowing off seed stalks before they turn reddish-brown prevents massive seed replenishment.
4. Diagnostic Checklist: Confirm It Is Curly Dock Before Spraying
- Large, elongated, lance-shaped basal leaves with distinctly wavy, curly margins
- Massive, deep, yellowish-orange branched fleshy taproot
- Tall, rigid flower stalks turning rusty reddish-brown in late summer, covered in winged seeds
Not 100% sure? Use our AI Photo Weed Scanner or review the full Curly Dock Botanical Profile.