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Edison writes

Will Tenacity Herbicide kill woodsorrel in St. Augustine lawns?

Answer:

Tenacity Herbicide cannot be used on residential St Augustine lawns and will not eliminate woodsorrel. To control woodsorrel (also known as oxalis) in a St Augustine lawn, you could use a product like Hi Yield Atrazine, or Fertilome Weed Free Zone.  Please note, Fertilome Weed Free Zone is not recommend to be used on Floratam or Bitterblue varieties of St Augustine unless discoloration and temporary injury can be tolerated. Other species of St Augustine would be safe if used at labeled rates.   It is recommended to apply a pre emergent like Pendulum 2G in Fall and Spring. (55 degrees in the Spring / Between 70 and 55 degrees in the Fall). Pre emergents prevent weeds from germinating which will help cut down on the amount of post emergents needed during growing seasons.  View our St. Augustine Lawn Care Guide and Warm Season Calendar Schedule for more information. 

Answer last updated on: 12/15/2021

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Tenacity Herbicide

Tenacity Herbicide

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$55.53

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