Identification and Control of Japanese Knotweed

Plant Materials Technical Note Number MT-49

This technical note is available in Adobe Acrobat format.

Plant Materials Technical Note Number MT-49 (PDF; 158 KB)

Issued April 2005.
If you have any questions, please contact one of the following:

Introduction: Japanese knotweed is a perennial weed introduced from eastern Asia that has escaped cultivation and become invasive across broad areas of the U.S. Used for erosion control and ornamental landscaping, it is being found with increasing frequency in Montana as single plants or small stands. Plant populations outside of cultivation have already been identified in numerous Montana counties since 1961. This Technical Note provides plant identification and control information.

• Description
• Ecological Implications
• Distribution
• Spread
• Control
• Revegetating after Removal of Japanese Knotweed
• Reporting Japanese Knotweed
• Alternative Species
• References

Joe Scianna, Horticulturist
Phone: (406) 662-3579
Email: Joe.Scianna

Jim Jacobs, Plant Materials Specialist
Phone: (406) 587-6995
Email: Jim.Jacobs

Ronald Nadwornick, State Resource Conservationist
Phone: (406) 587-6998
Email: Ron.Nadwornick

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Last Modified: 06/24/2008