Clover mites feed on more than 200 different species of plants, preferably clover, which gives them their name. But, surprisingly, they typically aren’t a huge problem for homeowners outdoors. It’s when they head indoors—in large numbers—that it’s a little more upsetting. “Clover mites are an occasional invader into our homes,” says Eric Benson, PhD, professor emeritus and extension entomologist withClemson University. “In some years, you’ll see more than others. When the temperature and moisture levels are right, the population can explode.”