Craig from Jackson, La writes
SpeedZone Lawn Weed Killer Concentrate is not labeled for use on St Augustine and most likely would cause damage if used on St Augustine lawns. Speedzone Southern is labeled for clover and dollarweed and for use on St Augustine grass. According to the Speedzone Southern product label: "The turf tolerance to this product may vary and temporary turf grass yellowing may occur on St Augustine. Do not apply Speedzone Southern to Floratam, Bitterblue or other improved species of St. Augustine. Please take a few moments to read through the product label completely for full instructions and other precautions".
Answer last updated on: 04/11/2018
