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Tlf from South Carolina writes,

It rained today, how long before i can apply Atrazine?


You should apply Atrazine when the ground is dry. This product will control both emerged weeds and weeds from seeds. Rain or water within 2 or 3 days of application may decrease the effectiveness on emerged weeds. However, for the control of weeds from seeds, rainfall or watering is necessary within 7 to 10 days after treatment.

Answer last updated on: 03/14/2015

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