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Old April 21, 2018   #410
Cole_Robbie's Avatar
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,391

My cousin, who used to work for Monsanto, says that as soon as the stuff dries away, you are pretty much good, a matter of hours perhaps. I would never follow that advice, personally, but he is the one with the education in that matter. I have rain forecast all week, which should be good enough for me, to be assured it has washed away.
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