Nut Seed Weed

As a homeowner with a maintained lawn, you may have heard of something called Nutsedge. Sometimes referred to as “sedgegrass,” “nutgrass,” or Nutsedge, also called nutgrass, is a perennial weed and can be very difficult to get rid of. This weed resembles grass blades, which can make it hard to differentiate this weed from your turf. This guide will help you see the difference.

Nutsedge: Causes and How We Can Treat It

As a homeowner with a maintained lawn, you may have heard of something called Nutsedge. Sometimes referred to as “sedgegrass,” “nutgrass,” or “watergrass,” this undesirable plant that tends to grow in wet areas is troublesome to many home lawns. Also, nutsedge is not a grass or a broadleaf weed, it is in the sedge family. This perennial plant grows from nutlets and rhizomes in the soil, that can remain there for many seasons. Throughout this blog we will dive deeper into identifying and treating the unsightly plant.

How to Identify Nutsedge

Nutsedge is easy to identify in a well-maintained lawn. In the summer months you might notice a small area of tall lime-green colored grass that is standing out amongst your lawn, this is typically nutsedge. One way to be sure is to look closely at the plant; the plant has a triangular base, and the nutsedge blade has a pronounced mid rib running down the middle.

What to Do If I have Nutsedge

  • Nutsedge is most problematic in lawns that have poor drainage or stay wet too long. This could be from overwatering with a sprinkler system, a lot of rain, or a combination of both. The best way to minimize nutsedge is to grow and maintain dense and healthy turf to outcompete nutsedge for space, food, and moisture.Low spots in the lawn that hold water also contribute to the proliferation of nutsedge. If you have drainage issues where water is pooling and is not running off or percolating into the soil, you may need to install drains or regrade the soil on the property. This will help move the water along, so it doesn’t sit causing the soil to remain wet for long periods of time. Additionally, you may want to rethink your watering schedule and timing in those zones, if you don’t want to regrade or add drainage.
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For information about cultural practices that may help with nutsedge control, you can read our blogs about each topic.

Should I pull Nutsedge out by hand?

We do not recommend pulling nutsedge out by hand. The reason being, when you pull nutsedge out by hand, you are only removing the blade above the soil. The nutlets and rhizomes are still present in the soil. Without killing the nutlets and rhizomes the nutsedge plants will continue to regrow in the same spot.

Chemical Control Option

At this point there are no preventatives for nutsedge currently on the market, so this only leaves post emergent control options. It’s important to know that traditional broadleaf weed and/or crabgrass controls do not kill or prevent nutsedge. Why? Nutsedge is not a broadleaf weed or grass, it’s considered a sedge. For nutsedge control a specialized product specifically or nutsedge provides adequate control when applied properly. Also, you may need more than one treatment to control the nutsedge present in the lawn. We recommend contacting a professional lawn care company to treat the nutsedge.

Homeowners can also treat nutsedge. We recommend if you are going to treat the nutsedge yourself to follow the label instructions closely to get the proper control. Finally, give the product time to work before you apply more.

We do not recommend using a non-selective herbicide (i.e. Round-Up) to control nutsedge. Products like this will damage the turf surrounding the nutsedge as well! This would lead to larger damaged areas of turf that will need to be seeded to establish grass again; the idea is to kill the nutsedge, not the desired grass around it.

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Conclusion

As the temperatures decrease with the onset of Fall, nutsedge will naturally start to die out on its own. It is important to remember that although the nutsedge blade is gone the nutlets will still be in the soil and will not die from the colder weather. Nutlets will produce new plants the next season and the nutsedge cycle will start over again, if left untreated.

Treating the nutsedge each year with a chemical control helps to reduce the amount of nutsedge present in the lawn from year to year. Although you may never eradicate the plant from your lawn entirely, a reduced number is more manageable than leaving it untreated.

If you are in our service area, and have questions about nutsedge control, request a free estimate online or give our office a call at 908-281-7888.

Nutsedge Identification Guide

Nutsedge, also known as nut grass, is a weed commonly found in lawns during the summer. These weeds stand taller than the grass in your lawn and are notoriously hard to get rid of given their immersive root systems. Nutsedge is a perennial sedge, meaning it is a grasslike plant that will live for at least two years and will come back year after year.

Use this guide to identify nutsedge in your lawn. Then, read the rest of our 4-part guide to learn how to get rid of nutsedge and where nutsedge grows.

Height

Nutsedge is easily identifiable from grass because it is taller than grass. Nutsedge grows much quicker than grass, even after being mowed.

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Shape

Nutsedge weeds, like all sedges (grasslike plants), have a triangular stem that can be felt in your hands. The stem of the sedge feels like it has 3 sides or 3 points, much like a triangle.

Leaves and Flowers

Nutsedge looks like long grass blades. At the end of a nutsedge stem, you will commonly find 3 leaves and flowers. The flowers can be different colors but are most commonly yellow or purple (dark red).

Yellow nutsedge, or nutsedge with yellow flowers, often grows in the middle of the summer while purple nutsedge (nutsedge with deep red or purple flowers) grows in the late summer.

Roots

Nutsedge is typically identified by its root system. Nutsedge has roots, called rhizomes, that can reach 8-14 inches below ground. Rhizomes will grow horizontally under the soil and emerge out of the soil to form a new sedge plant. This means multiple sedges may be connected by one series of rhizomes.

The roots will also have small, starchy tuber structures (known as “nutlets”) attached. If you see nutlets in the roots of the plant, you know for certain you have nutsedge.