How do you kill crabgrass in St Augustine?

Answer 1

In St. Augustine grass it is most important to apply a crabgrass preventer and fertilizer in early Spring. Far easier to prevent than to kill later as almost anything that kills crabgrass can kill St. Augustine grass. Our Ace Hardware sells a crabgrass preventer in the Spring. They now have a product called Garden Weasel Crabgrass killer. A container of this powder will do up to 200 sq. ft. Must be applied to wet leaves on the crabgrass. I found I did a second application on some "tough guys" but it worked fine.