Hi Natalie,

Thank you for contacting the UNH Extension Yard & Garden Infoline. My name is Debi Green. I am a Master Gardener volunteer and I am happy to help answer your question. 

I apologize that the page you were looking for is not found on our site. I will relay that to our supervisor. Thank you for letting us know.

I did find some other links that have helpful tips.  https://extension.unh.edu/blog/2018/09/when-best-time-control-japanese-knotweed

https://extension.unh.edu/blog/2018/05/invasive-spotlight-japanese-knotweed

If you feel you would like some professional assistance in this endeavor I have included this link to the NH Landscape Association. https://nhlaonline.org/find-a-professional/

Best of luck to you. I know it is a challenge to get rid of, but I also know that success is possible. It just will take several years to completely eradicate.

Please don't hesitate to reach out again with any further questions!



You are very welcome, Natalie!

My supervisor gave me a new link for the US Dept of Agriculture on knotweed. It has been a process getting updated links but we are continuing to work on that. 

Here you go: https://mm.nh.gov/files/uploads/agriculture/documents/japanese-knotweed-bmps.pdf

Debi