I used Trimec Plus (3 way w/post emergent crabgrass control) for the first time - on my own property. The warning about damage to KB and fescue is understated in my opinion. I mixed to the max and got significant yellowing of the turf - even with low temperatures (< 70 degrees). The good news is the crabgrass, clover and g-ivy are hurt real bad. We got rain the other day and the yellow spots are all but gone. Even though the product works, I don't believe the customer will be quite so understanding. I haven't decided if I'm going to use as part of my general arsenal - maybe only limited use.