Ray writes
Dismiss Turf Herbicide is safe for use on St. Augustine grass. Please be mindful that this product may cause temporary discoloration of your turf, however, it will recover within a few weeks. It is recommended that this product not be applied to turfgrass that is weakened or stressed due to weather, mechanical, chemical, disease or other related stressors. You will apply 0.18 - 0.275/1,000 sq ft. to the correct volume of water for that size area. You will not exceed more than 12 oz per acre. Please refer to the product label for complete mixing and applicaiton instructions.
Answer last updated on: 04/05/2018