Is it invading your yard?
Yellow nutsedge, nutgrass, or also known as water grass is a challenge in the lawn. Although it looks uch like a grass, it is sedge. Yellow nutsedge has triangular stems, is pale green to yellow and grows rapidly in the spring and early summer. It surges above the rest of the lawn only a few days after mowing. Nutsedge frequently occurs in areas of poor drainage. As with any weed control, a healthy, dense lawn is the best defense.
Pulling nutsedge by hand will actually increase the number of plants because dormant tubers are activated, causing them to send up more shoots. It is possible to control nutsedge by pulling, but you must be persistent. If you are, eventually the nutsedge will die out.
If you were going to treat with an herbcide, it would be better to leave the nutsedge plants undisturbed so the herbicide can be maximally translocated to the roots, rhizomes, and tubers. Sedge Hammer, which used to be called Manage, is the most effective herbicide and safe for most turfgrasses. It is also the most expensive, but if an infestation is not too severe, one application should take care of teh problem.
Old Mill Nursery 