Yellow nutsedge is neither a broadleaf nor grassy weed, but a type of sedge. It invades lawns, generally in the summer, and it's a challenge to control. A healthy lawn is your best defense against yellow nutsedge. Adequate water and fertilizer and consistent mowing and dethatching will make your lawn vigorous enough to crowd out the nutsedge. Once you notice yellow nutsedge in the grass, take action immediately. The later in the year you wait to manage yellow nutsedge, the harder it will be to kill it.
Things You'll Need
Hand pull small amounts of yellow nutsedge. Check the area in two weeks to see if the plant has returned. Larger amounts, or stubborn spots that reoccur, require the use of herbicide.
Water the lawn to a depth of 6 inches the day before you plan to use an herbicide.
Use an herbicide containing methanearsonate, according to label instructions. Do not apply it if the outside temperature is expected to be over 85 degrees Fahrenheit.
Water the lawn to a depth of 6 inches two days after applying the herbicide.
Repeat the entire procedure one week after the initial application.
- Purdue University Cooperative Extension Service; Control of Yellow Nutsedge in Homelawns; Clark Throssell; March 1998
- "Landscape Management: Planting and Maintenance of Trees, Shrubs and Turfgrass"; James R. Feucht and Jack D. Butler; 1988
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