A surfactant is not required when using Gordons Trimec Lawn Weed Killer Concentrate.
Yes, Gordons Trimec Lawn Weed Killer Concentrate is safe to use on Bahiagrass, Bermudagrass, Fescues, Kentucky Bluegrass, Perennial Ryegrass, Zoysiagrass, Centipedegrass and St. Augustinegrass (Except Floratam).
For St. Augustine and Centipede, as a Spot Treatment – apply at 1 fl oz per gallon of water per 500 sq ft. For broadcast applications, apply 4 fl oz per gallon of water per 2000 sq ft. View more information on page 2 of the product label.
For Cool Season turfgrasses, Gordons Trimec Lawn Weed Killer Concentrate is applied at the rate of 3 fl oz per gallon of water per 500 sq ft area for Spot Treatments and 6 fl oz per gallon of water per 1000 sq ft areas for entire Lawn Treatments.
Please view the full product label for more information.