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Yellow nutsedge is one of those weeds that can take uninvited residence in your turf and ornamental beds! It is a warm-season perennial weed that is best identified by how rapidly it grows in comparison to the surrounding grass. As described by the OARDC: “Yellow nutsedge is an erect, grass-like perennial, characterized by its shiny yellowish-green leaves, triangular stem, golden-brown flower head and shallow rhizomes (horizontal underground stems) that produce many nut-like tubers. Young seedlings are often confused with grasses. This species reproduces primarily by tubers and less often by seeds. Rhizomes help to enlarge patches….It is common throughout Ohio, where it occurs naturally in marshes and along riverbanks and lakeshores, and as a weed in cultivated fields, turf and gardens. It is especially common in poorly drained areas, but can tolerate upland sites as well. This species tolerates a wide range of soil types from sand to clay.”
This plant produces flat, narrow, straw colored flowers. Flowering typically occurs from July through September, with germination beginning in May. This is something to be on the lookout for at this time in your lawns!
The best control options for sedges such as this include products with the active ingredient Sulfentrazone or Halosulfuron.
REMEMBER PROPER MOWING PRACTICES:
On a separate note, we’d like to reiterate a few friendly reminders about proper mowing practices, as we’ve noticed a lot of “clumping” occurring in lawns recently!
First, ensure your mower blades are sharp as to not invite unwanted turf disease or turf damage via dull mower blades. Second, take into account mowing height, as you don’t want your mower deck too low; which can also open your grass up to damage from insects, disease and drought. Home lawns should be mowed at approximately 3”. This leads to point number three, make sure not to remove more than 1/3 of the turf blade per mowing. You don’t want to buzz your lawn down to a dangerously low height. Remember, the shorter the turf blade, the shallower the root system; which can lead to drought issues for your turf. Finally, leave grass clippings on your lawn when possible. If you mow at the right height as often as needed, clippings break down and provide nutrients that the soil craves and benefits from!
Nutsedge Information Referenced from: http://www.oardc.ohio-state.edu/weedguide/single_weed.php?id=84