Wild Violet (Viola sororia): Identification & Selective Herbicide Matrix
Quick Agronomic Summary
Triclopyr ester (TZone SE) combined with a surfactant is the gold standard for killing Wild Violets in cool-season lawns.
- Diagnostic Marker 1: Heart-shaped leaves with scalloped margins and glossy waxy coatings
- Diagnostic Marker 2: Deep pansy-like purple to blue-violet flowers blooming in early spring
- Diagnostic Marker 3: Fleshy, branching underground rhizomes that form dense persistent root clumps
What herbicide actually kills Wild Violet?
Triclopyr ester (TZone SE) combined with a surfactant is the gold standard for killing Wild Violets in cool-season lawns.
Standard 2,4-D only burns top growth while rhizomes survive. Triclopyr penetrates the thick waxy cuticle and translocates directly into the root crowns.
When is the best time to spray Wild Violets?
Apply in mid-to-late fall (October–November) after the first frost, followed by a second application 21 days later.
In autumn, violets channel carbohydrates into root storage, pulling the herbicide deep into the rhizome network.
EPA-Registered Herbicides Labeled for Wild Violet
The table below compares all selective herbicides in our database that control Wild Violet, including active ingredient groups, application temperature limits (°F), and surfactant requirements.
| Brand Name & EPA Reg. | Active Ingredient & WSSA Group | Temp Window (°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 |
Turfgrass Compatibility Matrix for Wild Violet Herbicides
Always verify that your chosen herbicide is safe for your specific lawn grass before broadcast spraying:
How to Distinguish Wild Violet from Lookalike Weeds
| Lookalike Species | Key Botanical & Diagnostic Difference |
|---|---|
| Creeping Charlie | Creeping Charlie has square stems and opposite leaves with a minty aroma; Wild Violet has glossy, heart-shaped leaves growing from a central crown. |