Invasives List

This list is alphabetical. If you can't find a species, and it has two names, check under both letters. For example, Japanese Knotweed is filed under "k" for knotweed, not "J" for Japanese.

Autumn Olive
Plant Identification Video

https://mm.nh.gov/files/uploads/agriculture/docume...

Barberry, European

https://mm.nh.gov/files/uploads/agriculture/docume...

https://extension.unh.edu/blog/2018/11/invasive-sp...

Barberry, Japanese

Plant Identification Video

https://mm.nh.gov/files/uploads/agriculture/docume...

Bittersweet, Oriental

Buckthorn, Glossy

Plant Identification Video

https://mm.nh.gov/files/uploads/agriculture/docume...

Buckthorn, Common

https://mm.nh.gov/files/uploads/agriculture/docume...

Burning Bush

Plant Identification Video

https://mm.nh.gov/files/uploads/agriculture/docume...


Bush Honeysuckles (Morrow's, Tatarian, Bell's)

Plant Identification Video
https://mm.nh.gov/files/uploads/agriculture/docume...

Garlic Mustard
https://mm.nh.gov/files/uploads/agriculture/docume...

Japanese Honeysuckle
https://mm.nh.gov/files/uploads/agriculture/docume...

Japanese Stilt Grass
https://mm.nh.gov/files/uploads/agriculture/documents/japanese-stiltgrass.pdf

Knotweed (Japanese, Giant, Bohemian)

Due to the complex nature of this species, Japanese Knotweed has its own information page here


Mile-a-Minute
https://www.agriculture.nh.gov/publications-forms/...

Multiflora Rose
Plant Identification Video

https://mm.nh.gov/files/uploads/agriculture/docume...


Norway Maple
https://mm.nh.gov/files/uploads/agriculture/documents/norway-maple.pdf

Other Invasives to Watch Out For

https://www.agriculture.nh.gov/farms-businesses/pl...

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Not all invasive species are legally prohibited. Some species are prohibited in nearby states, or have not yet been a problem in NH but may become a problem in the future. Some of these species are already on the NH watch list. Others are not. All of these are legally allowed to be sold in stores, but should be considered potentially invasive. Some examples of invasives that are major problems in surrounding states or south of NH include:

  • Mimosa Trees
  • Blue Lupine
  • Garden Yellow Loosestrife
  • Wild Parsnip
  • Black Locust (tree)
  • Beach Rose
  • Creeping Charlie
  • Bradford Pear
  • English Ivy
  • Wisteria Sinensis
  • Cogongrass
  • Sweet Autumn Clematis
  • Bugleweed/Ajuga
  • Butterfly Bush

Reporting Invasives

Please report sightings of invasive species (plants, wildlife, insects, fungi and diseases) via https://www.eddmaps.org/ or via their app https://www.eddmaps.org/apps.cfm. Sightings are verified by experts, and the maps are open to anybody to view and use.

On a computer: You will need to be able to identify the location precisely on a map, and include photos of the infestation site.

On a phone: You will need to allow location services, and take pictures of the infestation.