Nutsedge’s ability to reproduce makes it one of the most formidable adversaries of healthy lawns. Its seeds or seedlings may sometimes be present in garden soil or plants purchased from the local nursery. As a perennial, nutsedge comes back year after year, spreading its reach through seed dispersal and its ever-expanding root system. Horizontal underground stems called rhizomes produce roots that form shoots and small nodules called tubers that store nutrients the plant needs for the next season’s growth.