A few of my customers yard has this grass popping up in it the past month. Is this a normal grass? Or a weed? One of my customers yards its taking over and looks horrible! I can't mow stripes in this stuff! Is there something I can use to treat this stuff? I am in south east wisconsin. We have treated the lawns with a pre-emergent in the spring, and regular weed and feeds throughtou the season, liquid treatments of Momentum from JDL. Thanks in advance!