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fescue and cool season grasses


My wife and I planted 18 acres in the fall of 1998 (southeastern WI). In the second growing season we counted 37 species of forbs and 5 grasses (about 100 originally planted).  There are some patches of cool season grasses, none greater than 1/8 acre, and some small patches of reed canary grass.  If I were to spray these patcheswith Roundup in the next couple of weeks (april 7-21) would there be much loss of natives.  The last snow just melted and the only green I can see is grass.  I assume the little bluestem and side oats etc., won't be emerging till much later but are there any forbs at risk?
 
Larry Sullivan, Dodge County WI


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