I remember when we were going to spray for weeds on this very nice lawn and someone suggested that Quick Pro would work,and this is the first time we used it (NOT GOOD). We knew that a suggestive weed killer would work like 2-4-D,but this person said Quick Pro was fine. So we go over and apply the stuff,and in a couple of days the guy calls and says that half the lawn is brown. So we go over and take a look and Aaaahhhhhh!!!! It killed off half of the 1acre tall fescue lawn. We felt a heavy feeling in are stomach's just then. So we got to work,sense we ruined his lawn we would cut for free until it was back to normal,it was $50 a week. So it took 400lbs of K-31tall fescue and allot of watering . Now it's back to normal or maybe even better!! So the lesson learned was,read the instructions even if someone says it's OK,and DO NOT use Quick Pro on a lawn.