Control & Management
Control & Management
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Controlling knotweed requires expertise and a commitment to persistent, long-term management. Knotweed is notoriously challenging to eradicate. Its rhizomes are resilient, and even small fragments can lead to new plant growth. This makes control efforts, including chemical treatments and manual removal, extremely demanding.
Infestations are best handled by Professional Organizations. If you are interested in learning more about knotweed management techniques, please review these resources on best practices and check out our Frequently Asked Questions page.
General Control & Management
General Control & Management
Identification and Control Techniques for Common Upland Invasive Plants in Massachusetts (Chris Polatin, Land Stewardship, Inc.)
Control Methods for Japanese knotweed (NH Dept. of Agriculture)
Controlling early growth
Controlling early growth
This is the one place where we may actually be able to make progress. Monitor for new growths and using a shovel dig out the rhizomes being careful to get all of each rhizome and all of the roots and dig three feet deep preferably more. It is best to dig out a few feet to make sure all material is taken out.
Monitor the site through the next year.
Non-Herbicide Control Resources
Non-Herbicide Control Resources
Description of some of the common non-herbicide methods, followed by hyperlinks.
Herbicide Information
Herbicide Information
Description of herbicide control with a warning about proper use and restrictions, followed by hyperlinks to resources.
Peer-reviewed Research
Peer-reviewed Research
Links to resources
? Other category
? Other category
Links to resources
Subduing Knotweed - Seasonal Timelines?
Subduing Knotweed - Seasonal Timelines?
Control & Management Information
Control & Management Information
Control Methods for Japanese knotweed (NH Dept. of Agriculture)
Japanese Knotweed Fact Sheet (PennState Extension)
Knotweed Invasive Fact Sheet (VT Invasives)
Identification and Control Techniques for Common Upland Invasive Plants in Massachusetts (Chris Polatin, Land Stewardship, Inc.)
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