Cornerstone Plus Mix Calculator
Calculate the exact mix ratio of Cornerstone Plus (Glyphosate) per gallon of water. Perfect for weed control, brush management, and vegetation management.
Tank Mix & Application Details
Enter your target area and label rates to calculate per-gallon quantities
Total square footage of the area to be treated with herbicide.
Typical rate: 2.5 fl oz for annual weeds, up to 5.0 fl oz for perennials.
Standard is 1 gallon per 1,000 sq ft for backpack or boom sprayers.
Cornerstone Plus has a built-in surfactant. Add NIS only for tough, waxy weeds.
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 Application Rates per 1,000 sq ft
Standard mix ratios for Cornerstone Plus 5 (50.2% Glyphosate) based on target vegetation and carrier volume.
| Target Vegetation | Cornerstone Plus (fl oz) | Water (Gallons) | Surfactant (NIS) |
|---|---|---|---|
| Annual Weeds (Light) | 1.25 – 2.5 fl oz | 1 Gallon | Built-in |
| Annual Weeds (Heavy) | 2.5 – 3.5 fl oz | 1 Gallon | Built-in |
| Perennial Weeds | 3.5 – 5.0 fl oz | 1 Gallon | Built-in |
| Brush & Vines | 5.0 – 10.0 fl oz | 1 – 2 Gallons | 0.25% NIS |
| Spot Treatment | 1.5 fl oz | 1 Gallon | Built-in |
Cornerstone Plus FAQ
Everything you need to know about mixing and applying Cornerstone Plus for effective vegetation management.
For general annual weed control, a common mix is 2.5 fl oz of Cornerstone Plus per gallon of water (assuming a carrier rate of 1 gallon per 1,000 sq ft). For tough perennial weeds or brush, increase the rate to 5 fl oz per gallon. Always check your specific product label, as formulations like Cornerstone Plus 5 (50.2% Glyphosate) may have slightly different application rates.
Cornerstone Plus typically contains a built-in surfactant or adjuvant, meaning additional non-ionic surfactant (NIS) is not strictly required for most applications. However, when treating weeds with thick, waxy leaves (like bindweed or ivy), adding a small amount of NIS (0.25% v/v) can significantly improve herbicide uptake and effectiveness.
Cornerstone Plus is a systemic herbicide, meaning it must be absorbed by the foliage and transported to the roots. You will typically see initial yellowing and wilting within 3 to 7 days. Complete browning and death of annual weeds usually occurs within 1 to 2 weeks, while tough perennial weeds may take 3 to 4 weeks or longer to fully die.
Cornerstone Plus (Glyphosate) has no residual soil activity; it is inactivated immediately upon contact with soil minerals. This means you can safely plant most crops, grasses, or ornamental plants just 1 to 3 days after application, once the spray has completely dried and the herbicide has reached the target weeds’ roots.
Cornerstone Plus is safe for pets and children once the sprayed solution has completely dried on the foliage. It is highly recommended to keep pets and children off the treated area during application and until the spray has fully dried (usually 1 to 2 hours, depending on weather conditions). Always store the concentrated product securely out of reach.