Managing Invasive Plants

Why should I care about invasive plants?

Invasive plants out-compete and displace native plants.   They reduce biodiversity and wildlife habitat by changing cover, nest sites, water quality, and foods.  Invasive plants can cause human health problems too.  

How do I know what is an invasive plant?

Check out this Guide to Upland Invasive Plant Species produced by the NH Department of Agriculture, Markets, and Food (NHDAMF).


Print this handy poster!

How do I go about addressing invasive plants on my property?

Knowing where to start can be a bit overwhelming.  Fortunately, NH Fish and Game created this guide to planning successful projects – Picking Our Battles.

What methods are available for controlling invasive plants on my property?

There are a lot of good resources available to help you select the best method for controlling invasive plants.  Be sure to consider a program of integrated pest management.  Treating invasive plants near wetlands requires some additional consideration so read the label on all over-the-counter pesticides you purchase and use.

What should I do with the invasive plants after I remove them from my property?

Did you know it is illegal to collect, transport, sell, distribute, propagate, or transplant prohibited invasive plant species?  Have a plan for handling vegetative material.   Information from the UNH Cooperative Extension can help:  Disposing of Non Native Invasive Plants.

Report Japanese Knotweed on Bedford’s Roadways....

Did you know that the Department of Public Works implements a program of Japanese Knotweed treatment along town roadways.  If you know of an infestation, you can report it online through the Report a Concern link. 

Speaking of Japanese knotweed, this publication provides advice specific to Japanese knotweed control.   

Where can I learn more?

The UNH Cooperative Extension and the State Department of Agriculture, Markets, and Food provide lots in useful information about invasive plants. 

Invasive Species | Extension (

Invasive Plants | Plant Industry | NH Department of Agriculture, Markets and Food