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Time After Glyphosate Spraying Before Replanting

Auburn, AL

I'm trying to get some wildflowers going where I currently have grass and weeds. I had planned to spray with glyphosate and then come back and plant the small plants. I have read that Roundup Ready-to-Use Weed and Grass Killer III requires only a one-day wait, but then I have also read that glyphosate can be more persistent than expected. Is there any advantage or disadvantage of using this product vs mixing my own from 41% Glyphosate plus?

Clarksville, TN(Zone 6b)

Roundup Ready-To-Use Extended Control Weed & Grass Killer Plus Weed Preventer contains the selective herbicide imazapic. It kills existing grasses and weeds and does not allow seeds in the soil to germinate and sprout for up to four months. Because of its weed-inhibiting ability, it will prevent newly sown seeds from growing. This includes new lawns, edible gardens or ornamental plants. Wait at least four months to replant after using this product. If you plan to replant before that time, use a formula that does not contain a weed preventative.

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