Wednesday, July 17, 2024
Log in or create a new MyGrange account
Keyword / Search: 


Legislatively Speaking
Connecticut's invasive plant species

By Charles Dimmick, State Legislative Committee

  JANUARY 3, 2012 --

During the 2011 Grange State Session a resolution was introduced dealing with the fact that some operators of “big box” stores in Connecticut were selling plants which were on the “invasive plants” list, in violation of State Law. An invasive plant is a non-native species which aggressively moves into a native habitat and crowds out native plants. This changes the native habitat, especially by decreasing plant diversity and thus decreasing both the food that native animals depend on and also in some cases decreasing the available shelters for such animals. Invasive plants also cause problems for farmers and foresters, and aquatic invasive plants are a nuisance or even a threat both to commercial fisheries and to recreational boaters and anglers. Scientists have identified more than 400 invasive plants in Connecticut. Some of these pose much greater risks than others. 

The resolution was re-written in committee, and the final resolution that was passed resolved that we urge the Connecticut General Assembly to increase funding to DEEP (the new Department of Energy and Environmental Protection) specifically earmarked for enforcement of laws banning sale of invasive plant species, and that we urge significant monetary fines or penalties to be imposed on any business which is found to have such plants for sale, and that all businesses selling plants receive and be required to acknowledge receipt of a list of invasive plant species along with a copy of the state law forbidding the sale of such plants.

In 2003 the General Assembly of the State of Connecticut created a 9-member Invasive Plants Council, which meets six to eight times a year in the Connecticut Department of Agriculture offices. The minutes of their meetings may be found on the web at:  www.hort.uconn.edu/cipwg/IPC.

The duties of the Council are as follows:

(1) Develop and conduct a program to educate the general public and merchants and consumers of aquatic and land-based plants as to the problems associated with invasive plants; (2) make recommendations to control and abate the spread of invasive plants; (3) make available information regarding invasive plants available to any person or group who requests such information; (4) annually publish and periodically update a list of plants considered to be invasive or potentially invasive; and (5) support those state agencies charged with protecting the environment in conducting research into the control of invasive plants, including, but not limited to, the development of new varieties of plant species that do not harm the environment and methods of eradicating and managing existing species of invasive plants.

Invasive plants vary in their environmental and economic threat. One that has recently invaded Connecticut, the mile-a-minute vine (also called devil’s tearthumb), a member of the smartweed family, can grow up to a half-foot a day, and rapidly grows over other plants, killing or greatly weakening them by shading them out, stealing their nutrients, and choking them by tightly wrapping around their stems. The good news is that it is an annual, and is killed by the first good frost; the bad news is that it makes lots and lots of seeds, so that the next year there are hundreds of plants where there was only one the year before. Up-to-date information about this invader can be found at: http://www.hort.uconn.edu/mam/


Invasive Species List:

As provided by the Connecticut Invasive Plants Council.  The following list only provides the common name.  Scientific names and synonyms are also available on the website listed above.  This list was last updated in October 2011.

American water lotus

Amur honeysuckle

Amur maple

Autumn olive

Belle honeysuckle

Bittersweet nightshade

Black locust

Black swallow-wort

Border privet

Brazilian water-weed

Bristled knotweed

Brittle water-nymph

California privet

Canada bluegrass

Canada thistle


Common barberry

Common buckthorn

Common kochia

Common reed

Common water-hyacinth

Crested late-summer mint

Crispy-leaved pondweed

Cup plant

Cypress spurge

Dame’s rocket

Drooping brome-grass

Dwarf honeysuckle


Eurasian watermilfoil

European privet

European waterclover

False indigo


Fig buttercup

Flowering rush


Garden heliotrope

Garden loosestrife

Garlic mustard

Giant hogweed

Giant knotweed

Giant salvinia

Glossy buckthorn


Ground ivy

Hairy jointgrass


Japanese barberry

Japanese honeysuckle

Japanese hops

Japanese knotweed

Japanese sedge

Japanese stilt grass



Leafy spurge

Mile-a-minute vine


Morrow’s honeysuckle

Multiflora rose

Narrowleaf bittercress

Norway maple

Onerow yellowcress

Oriental bittersweet

Ornamental jewelweed

Pale swallow-wort


Perennial pepperweed

Pond water-starwort


Princess tree

Purple loosestrife

Ragged robin

Reed canary grass

Reed mannagrass

Rugosa rose

Russian olive

Scotch thistle

Sheep sorrel

Slender snake cotton

Spotted knapweed


Sycamore maple

Tansy ragwort

Tatarian honeysuckle

Tree of heaven

Variable-leaf watermilfoil

Water chestnut

Water lettuce


White poplar


Winged euonymus

Yellow floating heart

Yellow iris



© 2024 The Connecticut State Grange. All Rights Reserved.