Triclopyr Ester & Tenacity Mix Calculator
Calculate the exact mix ratio of Triclopyr Ester, Tenacity (Mesotrione), and surfactant per 1 gallon of water. Perfect for lawn care, brush control, and broadleaf weed treatment.
Tank Mix & Application Details
Enter your target area and label rates to calculate per-gallon quantities
Total square footage of lawn or brush area to be treated.
Typical rate: 1–2 fl oz of 40% Triclopyr Ester per 1,000 sq ft.
Typical post-emergent rate: 5 ml per 1,000 sq ft (up to 8 ml for tough weeds).
Standard is 1 gallon per 1,000 sq ft for boom or backpack sprayers.
Required for post-emergent Tenacity applications. Omit for pre-emergent use.
Per-Gallon Mix Recipe
Exact amounts to add to 1 US gallon of water
Enter your area and product rates above, then click Calculate Mix per Gallon to see your 1-gallon tank recipe.
Common Tank Mix Rates per Gallon
Typical mix ratios used by lawn care professionals for Triclopyr Ester + Tenacity combinations at a 1 gallon per 1,000 sq ft carrier rate.
| Use Case | Triclopyr Ester (fl oz) | Tenacity (ml) | Surfactant (NIS) |
|---|---|---|---|
| Light Lawn Maintenance | 1.0 fl oz | 5 ml | 1 tsp (0.25%) |
| Standard Broadleaf Control | 1.5 fl oz | 5 ml | 1 tsp (0.25%) |
| Tough Weeds (Clover, Violets) | 2.0 fl oz | 8 ml | 2 tsp (0.50%) |
| Brush & Vine Control | 2.5 fl oz | — (not used) | 2 tsp (0.50%) |
| Pre-Emergent at Seeding | — (not used) | 5 ml | None |
Triclopyr & Tenacity FAQ
Everything you need to know about mixing and applying Triclopyr Ester and Tenacity for effective lawn and brush control.
A common tank mix for general lawn and brush control is 1 to 1.5 fl oz of Triclopyr Ester (40% formulation) combined with 5 ml (approx. 0.17 fl oz) of Tenacity (Mesotrione 4SC) per gallon of water. Always add a non-ionic surfactant (NIS) at 0.25% to 0.5% v/v (roughly 1 to 2 teaspoons per gallon) to help the herbicide stick to and penetrate the foliage.
Yes, Triclopyr Ester and Tenacity (Mesotrione) are commonly tank-mixed for broad-spectrum weed control. Triclopyr targets tough broadleaf weeds, vines, and brush, while Tenacity controls crabgrass, dandelions, and other grassy and broadleaf weeds in tolerant turf. Always check both product labels for compatibility and follow the most restrictive precautionary statements.
Yes. When Tenacity is used as a post-emergent herbicide, a non-ionic surfactant (NIS) at 0.25% to 0.5% v/v is required by the label to ensure proper adhesion and uptake through the leaf surface. For pre-emergent applications (such as at seeding), surfactant is typically NOT used. Always read the product label for your specific use case.
A general rule of thumb is that 1 gallon of mixed spray solution covers approximately 1,000 square feet when applied at a standard carrier rate of 1 gallon per 1,000 sq ft. Coverage may vary based on spray equipment, nozzle type, target vegetation density, and desired thoroughness of coverage.
Triclopyr Ester is an oil-soluble formulation that penetrates leaf cuticles more effectively, making it superior for brush, vines, and tough woody plants. It also performs better in hot, dry conditions. Triclopyr Amine is water-soluble, less volatile, and safer near desirable plants in cool, moist conditions, but generally less effective on woody vegetation. For tank mixes with Tenacity in lawn care, the ester formulation is most commonly used.
Apply when target weeds are actively growing, typically in late spring through early autumn. Ideal conditions are temperatures between 15°C and 27°C (60°F–80°F), low wind, and no rain expected for at least 24 hours. Avoid application during drought stress, extreme heat, or when turf is dormant, as this reduces efficacy and increases the risk of turf injury.