How Do You Get Rid of Nutsedge?

“How can you get rid of nutgrass (aka. yellow nutsedge)? Question from Michael of California.

Answer: What a pain of a weed! Huh? You pull it up, and it just seems to return again and again and again. Here’s why. Nutgrass or yellow nutsedge (Cyperus esculentus) is given its name for the little “nutlet” tubers it produces underground. These nutlets are kind of like little weed bombs because each one will develop into a whole new plant if left in the ground. It’s a devious way for the plants to be foraged or pulled and still remain in the soil ready to reroot, reshoot and grow as if never removed. This is also why foliar weed killers rarely touch it. Nutsedge grows best in moist soil but can tough it out almost everywhere. [As a side note, nutsedge nutlets are also edible and eaten in many cultures. Click here to read more.] We encourage you to view the nutlets and more images for ID on this Washington State webpage before starting the removal process.

Here are some truly effective ways to remove nutsedge without using chemicals.

  1. For small garden infestations, dig up plants to a depth of 10 inches, place weeds and soil on a tarp, and gather up all plant parts, making sure you remove all the nutlets. Nutlets need to be fairly close to the soil surface to sprout and can survive in the soil for 2 to 4 years, so after eradicating most of the sedge from an area, opt for a no-till strategy to keep any deep nutlets from being brought too close to the surface. Then keep a lookout for newly sprouted sedges and just pull or lightly hoe them when they are tiny. Adding a thick layer of organic mulch is also wise.
  2. For large garden infestations, dig it up plants as completely as you can, and then smother the area with weed cloth covered with an additional layer of mulch or leaf compost (for ornamental beds) or straw (for vegetable beds) to keep seedlings and nutlets from resprouting. After a few years, the residual nutlets should be gone and the weed cloth can be removed.
  3. For both cases, keep a lookout for newly sprouted sedges and remove them on sight. Never let them get large enough to set seed.

I hope these tips help!

Happy gardening,

Jessie Keith

 

 

About JESSIE KEITH


Plants are the lens Jessie views the world through because they’re all-sustaining. (“They feed, clothe, house and heal us. They produce the air we breathe and even make us smell pretty.”) She’s a garden writer and photographer with degrees in both horticulture and plant biology from Purdue and Michigan State Universities. Her degrees were bolstered by internships at Longwood Gardens and the American Horticultural Society. She has since worked for many horticultural institutions and companies and now manages communications for Sun Gro Horticulture, the parent company of Black Gold. Her joy is sharing all things green and lovely with her two daughters.

Leave a Reply

Content Disclaimer:

This site may contain content (including images and articles) as well as advice, opinions and statements presented by third parties. Sun Gro does not review these materials for accuracy or reliability and does not endorse the advice, opinions, or statements that may be contained in them. Sun Gro also does not review the materials to determine if they infringe the copyright or other rights of others. These materials are available only for informational purposes and are presented “as is” without warranty of any kind, express or implied, including without limitation warranties of merchantability, fitness for a particular purpose, and non-infringement. Reliance upon any such opinion, advice, statement or other information is at your own risk. In no event shall Sun Gro Horticulture Distribution, Inc. or any of its affiliates be liable to you for any inaccuracy, error, omission, fact, infringement and the like, resulting from your use of these materials, regardless of cause, or for any damages resulting there from.