09/11/2026
🌿 Roadside Japanese Knotweed Treatment – Friday, September 11
Today, the Town of Gilford is conducting a targeted herbicide treatment to control Japanese Knotweed along select Town roads.
Japanese Knotweed is an aggressive invasive plant designated by the New Hampshire Department of Environmental Services (NHDES). It spreads rapidly, crowds out native vegetation, blocks visibility around guardrails, signs, and fire hydrants, interferes with driver sight distance, and restricts stormwater flow in roadside drainage ditches.
Herbicide treatment is the most effective method for controlling Japanese Knotweed. Simply mowing the plant can actually cause it to spread, making the infestation worse.
This work is being completed under a special permit issued by the New Hampshire Department of Agriculture. Evergreen Forest Management, LLC, a licensed New Hampshire pesticide applicator, is performing the treatment in areas where knotweed has been identified within the Town's right-of-way and where treatment is authorized under the permit.
If you have any questions or concerns, please contact the Gilford Department of Public Works at 603-527-4778.
To learn more about Japanese Knotweed and why it is important to control this invasive species:
https://mm.nh.gov/files/uploads/agriculture/documents/japanese-knotweed-control.pdf
Best Management Practices (see pages 7–8):
https://mm.nh.gov/files/uploads/agriculture/documents/japanese-knotweed-bmps.pdf