Mansion turf herbicide is the best product I have found for dollar weed. Its a granular product you mix a very small amount in a pump up sprayer with a gallon of water and spray directly on the weeds. If used at the proper ratio it kills the dollar weeds and leaves the St. Augustine alone. Do it on a dry day during the active growing months and you get zero run-off. It dries on the leaves of the dollar weed and is absorbed into the plant. This minimizes any impact on the Lagoon. Takes about three weeks to work. You will notice a slight discoloration after the first week. By the second week they will be yellowing. Gone after about the third week. Go to Site-one, formerly John Deere Lesco and talk to the boys.

^that's responsible herbicide management right there

good stuff

 

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