I have retired from a lawn business and never had a post emergence crabgrass control at that time. I applied Crab-E- plus with great results. it did take several weeks but it looked like maybe it wouldn't. after several mowing, it was gone and so far months later, no sign of it. we have accepted it as our treatment for crab grass, nut sewage as well for other weeds for our hoa lawns. give it time.
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