Yellow nutsedge, or "nutgrass," is typically found in wet areas around your lawn. You may slow its spread by limiting the amount of supplemental irrigation applied to your lawn. Chemical control can be obtained with herbicides, such as Halosulfuron and MSMA, specifically labeled for nutsedge.

Understanding nutsedge propagation aids control. Natural propagation is by seed (very minor in well-maintained lawn), rhizomes, and tubers. Rhizomes terminate producing a tuber; and a new plant soon invades the turf. Tubers generate several rhizomes. Digging out the tubers is only an option in very loose loam soils, and you should be sure to collect all tubers.

Certainly, if there are areas with drainage issues they must be corrected.

Using nonselective herbicides (i.e., glycophosate) you will leave dead spots in turf for most of the current growing season. Newer selective herbicides (i.e., imazaquin) may be safely used in many warm-season grasses and with some ornamentals. The advantage of selective herbicides is, instead of lots of spot spraying in large areas, broadcast applications are possible, as long as treasured plants are tolerant or protected.

Keep in mind that any tubers not attached to the "mother" plant by rhizome and without growing blades will need to be sprayed at a later date.

Contact your local Extension office for up-to-date herbicide recommendations.