Product Q&A

Answer:

QuinKill Max Crabgrass and Weed Killer cannot be used on St Augustine grass, Bahiagrass, carpetgrass, or dichondra. Unfortunately, there really isn't a post-emergent crabgrass killer available for St Augustine grass unless you are willing to go to a higher price point. We do carry Echelon 4SC, and it is labeled for use on St Augustine. Still, the product label does warn "Application of Echelon 4SC to St. Augustinegrass may cause temporary discoloration to exposed leaf surfaces of St. Augustinegrass. Treated turfgrass will recover with new growth, and discolored leaf tissue will be removed with mowing."

Answer last updated on: 04/30/2023

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