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Bill from Colleyville Tx writes

Which pre-emergents are safe to use under trees?

I have been told that some preemergents are dangerous to use under trees. Which premergents are safe to use on St augustine under my trees (mostly Oaks)

Answer:

You can use most pre-emergent herbicides that are safe for turfgrass such as St. Augustine around established trees such as oak trees. Surflan Pro is popular for use around ornamental plants and on warm-season turf like St. Augustine. Hi-Yield Weed and Grass Stopper with Dimension is a great choice for a granule for spring application. If you would like to provide us with more information about the weeds you are targeting how much area you are covering, then we can offer other recommendations.

Answer last updated on: 08/21/2019

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