Product Q&A

Answer:

The best time to apply Certainty for poa annua or for any of the other listed weeds on the label would be when they are actively growing. You should mix Certainty with a surfactant to increase its effectiveness. It would be best to call your local county extension office for when to apply any type of herbicides or insecticides in your area. They will know exactly when you should apply it in your specific county. You can find your local county extension office information here:  http://www.csrees.usda.gov/Extension/index.html

Answer last updated on: 06/16/2016

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