How to Kill Purple Deadnettle in Bermudagrass Without Hurting Your Lawn
Direct Agronomic Answer
To selectively kill Purple Deadnettle in Bermudagrass 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%) when air temperatures are between 50°F and 85°F.
Fast-acting PPO inhibitors like Carfentrazone knock down Deadnettle within 24 to 48 hours even during chilly spring mornings.
1. Labeled Safe Herbicides That Kill Purple Deadnettle in Bermudagrass
| 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 |
2. What NOT to Spray on Bermudagrass When Treating Purple Deadnettle
Warning: Common Purple Deadnettle Killers That Damage Bermudagrass
Many retail herbicides advertised for Purple Deadnettle are formulated for different turf zones and will severely injure Bermudagrass:
- AVOID Tenacity (Mesotrione 40%): Rated 'avoid_actively_growing' on Bermudagrass — high risk of turf phytotoxicity or stunting.
- AVOID TZone SE (Triclopyr 7.72%, 2,4-D 29.36%, Dicamba 2.22%, Sulfentrazone 0.66%): Rated 'damage_risk' on Bermudagrass — high risk of turf phytotoxicity or stunting.
3. Optimal Seasonal Timing & Temperature Thresholds
Apply post-emergents in February or March before purple flowers produce seeds.
Fall pre-emergent Prodiamine or Dithiopyr provides excellent preventative control.
4. Diagnostic Checklist: Confirm It Is Purple Deadnettle Before Spraying
- Upper foliage shaded in a distinct purple to bronze-red hue
- Heart-shaped to triangular leaves attached via slender petioles
- Square, hollow stems with pink-purple two-lipped flowers in early spring
Not 100% sure? Use our AI Photo Weed Scanner or review the full Purple Deadnettle Botanical Profile.