Yellow nutsedge grows most rapidly during the hot summer months. It is often found in wet or poorly drained soils. Control of yellow nutsedge is difficult. Herbicides are generally not effective. Normally, the best way for home gardeners to control a small infestation of yellow nutsedge in the lawn or garden is by hand pulling.
Plants do pull easily.
Persistence, however, is required. When yellow nutsedge plants are pulled, some of the underground nutlets break off and remain in the soil. Eventually the nutlets sprout and the plants reappear. If pulled repeatedly, however, it is possible to control yellow nutsedge. Iowa State University , Ames, Iowa.