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Old 08-19-2013, 05:41 PM
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JimLewis JimLewis is offline
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Join Date: Dec 1999
Location: Beaverton, OR
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Well, I was curious who was right in this debate. So since SnapShot is the main pre-emergent we install, I contacted Dow AgroSciences, LLC (the manufacturer) and posed this question to them. The question being; whether it's best to install the Pre-M underneath a layer of new mulch or on top. Seems that either application is acceptable. But it seems that you do not need to do both. Here is the exact reply I got from "Jenny" with Dow;

Thank you for contacting Dow AgroSciences. It can be done both ways. We always tell folks if the mulch is not down yet, go ahead and apply SnapShot* first. If it is already down, just make sure you are watering it enough so that it gets incorporated into the soil.

I hope this helps!

Thank You,
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Jim Lewis
Lewis Landscape Services - Oregon
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