How to Control Nutgrass
Now is the Time to Eliminate This Persistent Weed
Nutsedge, commonly known as “nutgrass,” is a persistent weed that can quickly take over your lawns and gardens, especially during fall. Although it looks similar to grass, nutsedge is part of the sedge family and can be tricky to eliminate due to its extensive underground tubers or “nutlets.” Here’s a comprehensive guide on how to identify, prevent and control nutsedge in your landscape this fall.Understanding Nutsedge
Nutsedge is typically identified by its bright green color and triangular stems. Unlike common grasses, nutsedge thrives in moist conditions and can easily outcompete desired turfgrass species due to its rapid growth and spread. If left untreated, it can establish large colonies that dominate lawns, planters and even hardscapes.Why Fall is the Best Time for Control
Fall is an ideal time to control nutsedge because the weed starts storing energy in its underground tubers to survive the winter. Applying herbicides during this period allows you to effectively target these reserves, weakening the plant before dormancy.Effective Strategies for Controlling Nutsedge
- Proper Identification. Before taking any control measures, ensure that you have correctly identified the weed as nutsedge. Common characteristics include:
- V-shaped leaves.
- Triangular stems.
- Rapid, upright growth.
- Cultural Practices
- Improve Drainage: Since nutsedge thrives in moist soil, addressing drainage issues in your lawn can discourage its growth. Consider aerating the soil or installing French drains to reduce moisture buildup.
- Mow Regularly: Maintain a regular mowing schedule to keep your grass healthy and dense. This practice can help outcompete nutsedge and prevent it from spreading.
- Chemical Control Options
- Post-Emergent Herbicides: The best approach for nutsedge control is using a post-emergent herbicide specifically labeled for sedge control, such as halosulfuron or sulfentrazone. These herbicides are absorbed by the leaves and travel down to the tubers, inhibiting growth.
- Timing of Application: Apply herbicides in late summer to early fall when nutsedge is actively growing. Be sure to follow up with a second application if necessary, as nutsedge can be resilient.
- Spot Treatment: Rather than blanket spraying your entire lawn, use spot treatments to minimize herbicide use and protect surrounding plants.
- Non-Chemical Control Methods
- Hand-Pulling: Small patches of nutsedge can be removed manually. However, make sure to pull out the entire plant, including the nutlets, to prevent regrowth.
- Solarization: Cover the affected area with clear plastic sheeting to trap heat and solarize the soil. This process can effectively kill nutsedge by heating the soil to high temperatures.
- Preventing Reinfestation
- Monitor Soil Conditions: Regularly check the soil for excess moisture and correct it as needed.
- Use a Pre-Emergent Herbicide: After your post-emergent treatments, applying a pre-emergent herbicide in late winter or early spring can prevent nutsedge seeds from germinating.
Managing nutsedge in the fall requires a combination of cultural practices and targeted chemical applications. By addressing the problem now, you can reduce the chances of the weed reappearing in the spring. If you’re unsure about which herbicide to use or how to properly apply it, please give us a call today.
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