Getty Images/Alice Morgan You’ve worked hard to create a lawn that’s lush, green, and gorgeous. But now those weeds popping up are eyesores and an offense to all your hard work. And once they get a foothold, they proliferate! “Weeds are fighting for light, water and nutrients with desirable turfgrass,” says Matt Elmore, PhD, assistant extension specialist in weed science at Rutgers, the State University of New Jersey. “Growing dense, healthy turf is the best defense to keep weeds under control.” The biggest offenders in most lawns? Dandelions, crabgrass, clover, and nutsedge. Here’s how to tackle the most common weed problems in your yard: