Weed Man North DFW Nutsedge Fact Sheet
Nutsedge is a common weed found in many home lawns and other turfgrass areas in the United States. There are many different types of nutsedges but yellow and purple nutsedge are the most common turf pests. Nutsedges are easy to distinguish in your lawn due to their characteristics in growth habit, light green color and rapid growth rate resulting in a nonuniform turf. This weed most likely came onto your property with your sod, which is why your lawn may have it but your neighbor's lawn does not.
Although nutsedges are often referred to as "nutgrass" and resemble grasses, they are not grasses but true sedges. Their leaves are thicker and stiffer than most grasses and are arranged in sets of three at the base. Yellow nutsedge has light brown flowers and seeds, and purple nutsedge flowers have a reddish tinge and the seeds are dark brown or black.
Yellow and purple nutsedge are perennial plants. They usually die back in the fall as temperatures decrease but the tubers and rhizomes of the plant will survive in the soil to sprout next spring. Tubers are usually in the top 6 inches of the soil and can remain dormant for up to three years before germinating.