Ok, I have had some nice lawns until recently. The Crabgrass is just starting to pop as well as clover. I did them all with preemergent now we had aton of rain the last few weeks here in the eastcoast (not sure if it could of washed out)? I am thinking of hitting these lawns with drive. Also noticed some of the lawns look weak even with irragation including my own? I have never had to do this before, am I on the right track? Thanks all!