Quoted: There are ?numerous? benefits to using covers on turf during the winter months, says Dr. Paul Koch, associate researcher of Turfgrass Pathology at the University of Wisconsin-Madison. He cites protection from winter desiccation and early spring green-up as probably the most significant benefits. There may also be some protection from crown hydration when using an impermeable cover like a GreenJacket, although he says data is a little more mixed on that subject.