Nutsedge 101: How to Identify and Control It in Your Lawn

If you’ve noticed bright lime-green tufts sticking up above your otherwise healthy lawn, you might be dealing with nutsedge, also known as nutgrass, kyllinga, or water grass. This persistent weed thrives in wet, poorly drained areas and can quickly take over if left unchecked. Here’s what you need to know to keep your lawn looking its best.

What is Nutsedge?

Nutsedge is a fast-growing, grass-like weed that stands out with its sharp, sword-like leaves and neon green color. Unlike regular turfgrass, nutsedge grows faster and taller, especially after heavy rains or in areas where water tends to pool. You’ll often find it in drainage swales or low spots in your yard.

How to Identify Nutsedge

• Color: Brighter, lime-green compared to your regular turf.
• Texture: Blades are triangular and feel sharp or stiff.
• Growth Pattern: Grows faster and taller than surrounding grass, often in clumps.

Why is Nutsedge a Problem?

Nutsedge spreads through underground tubers called “nutlets.” If you try to pull it by hand, these nutlets often break off and remain in the soil, leading to even more growth. That’s why traditional weeding methods just don’t work.

How to Control Nutsedge

1. Don’t Pull It: Pulling only makes the problem worse by leaving nutlets behind.
2. Improve Drainage: Nutsedge loves wet soil. If possible, address drainage issues in your yard to make conditions less favorable for this weed.
3. Use the Right Herbicide: The most effective way to control nutsedge is with a post-emergent herbicide containing Halosulfuron-methyl, like Sedgehammer. This product is safe for all major grass types, both cool and warm season, and targets nutsedge at the root.

Application Tips:

• Apply when nutsedge is actively growing.
• Choose the size of Halosulfuron: One 13.5-gram pouch treats 1,000 sq ft and includes surfactant. The larger bottle covers up to 43,500 sq ft (1 acre).
• Mixing: Add the entire pouch (or one scoop from the bottle) to 1 gallon of water. For the larger bottle, add a non-ionic surfactant if not included.
• Application Method: Use a battery or pump sprayer for even coverage. Blanket spray for widespread sedge or spot treat as needed.
• Watering In: Do not water in after application, let the product sit on the foliage for best results.
• Tank Mixing: Halo Select can be mixed with other herbicides like Image, Celsius, or BioAdvanced for broader weed control.
• Avoid mowing right before or after application for best results.

Takeaway

Nutsedge can be a stubborn foe, but with the right approach, you can reclaim your lawn. For more tips and recommended products, check out Yard Mastery’s full range of DIY lawn care solutions.