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Don from Wichita, Ks writes

What air or soil temperature is necessary for Ortho WeedClear Lawn Weed Killer Concentrate to be effective?

I want to use Ortho WeedClear as early this spring as it can be effective. What air or soil temps are necessary for it to be effective?

Answer:

Ortho WeedClear Lawn Weed Killer Concentrate label instructs product should be applied when the weeds are small and growing in the spring or fall. Crabgrass, large and smooth- Apply in the spring before crabgrass is 4 inches tall or when crabgrass is first noticeable in the lawn. Make a second application after 3 weeks for dense weed populations. Most selective herbicides wont work below 55 degrees. For the best times to apply in your area we recommend conatcting your local extension office. 

Answer last updated on: 02/01/2024

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Ortho WeedClear Lawn Weed Killer Concentrate

Ortho WeedClear Lawn Weed Killer Concentrate

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