I need a weed killer that works when it's cold out. Winter isn't over but I see way too many weeds in my fescue and bermuda grass. I think I can safely use some roundup for the bermuda because it's still dormant. But my fescue is growing fine as are the weeds. I got some stuff from you last summer but when I was reading the label, it said I need it to be warmer then it is for it to work right. Are there any alternatives?

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