top of page

Identify some invasive plants of the North Country

Here are some of the common invasive plant species in New Hampshire.


Click on the name for more information, including photos:

Japanese Knotweed (Reynoutria japonica)

Common Reed (Phragmites australis)

Garlic Mustard (Alliaria petiolate)

Oriental (Round Leaf) Bittersweet (Celastrus orbiculatus)

Spotted Knapweed (Centaurea stoebe)

Mile-a-minute vine (Persicaria perfoliata)

Multiflora Rose (Rosa multiflora)

Purple Loosestrife (Lythrum salicaria)

This link will take you to the complete list of invasive plant species in New Hampshire:

The State of New Hampshire has also published a handy little booklet called New Hampshire Guide to Upland Invasive Species. You can find it at:

bottom of page