Spread the Word Not the Weed

How YOU can prevent the spread of Japanese Knotweed

Why is it a problem?
Japanese knotweed (Polygonum cuspidatum) is a non-native invasive plant. Fast growing and aggressive, it spreads and displaces native species and diminishes the scenic and recreational qualities of our area.

How it spreads
Japanese knotweed can spread through seed dispersal, and through its extensive root system, (7 ft. deep, 25 ft. wide) but new colonies can also grow from 1/2 inch plant fragments moved to new locations.

Enough is enough!
Over the past several decades, this plant has spread along riverbanks and roadsides, often moved by people unaware they may be spreading it.

Now is the time to spread the word on knotweed "dos and don'ts". . .

Click on images to see larger versions.

You're not alone . . .
Public and private organizations are working to address the spread of knotweed in our region and to evaluate environmentally sound control measures.

For more information, contact:
  • The Nature Conservancy, Delaware River Invasive Plant Partnership, 570-643-7922
  • National Park Service, Upper Delaware Scenic & Recreational River, 570-729-7842
  • Cornell Cooperative Extension, Sullivan County, 845-292-6180
  • NYC Department of Environmental Protection Stream Management Program, 845-340-7515
  • Delaware River Foundation, 607-637-3220
  • Delaware County Soil & Water Conservation District, 607-865-7161
Illustrations by Brian P. Kowalcyzk

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