The Long Island Invasive Species Management Area

How Can You Help

1. Learn more about invasive species by:

Reading these Frequently Asked Questions

Attending LIISMA Bimonthly Meetings. See the Schedule Here.

Subscribing to Our Listserve:

Address an e-mail to:

For the subject of your message, type the single word:


Leave the body of the message blank. Do not include any signature block or any other text in the body of the e-mail. Do not use any unusual font for the word "join".

To unsubscribe from the listerve, address an email to

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Joining Our Facebook Page: CLICK HERE.

Following Us On Twitter: CLICK HERE.

Seeing what invasives are around you on iMAP invasives maps.

2. Support the ‘Do Not Sell’ Laws

Help Long Island abide by the invasive plant ‘Do Not Sell’ laws passed in Suffolk and Nassau counties. While all forty-five invasive plants already banned for sale, transport, distribution, and propagation may unknowingly be sold by nurseries and garden centers, the following nine plants may be more common:

Autumn olive (Elaeagnus umbellata) Porcelain-berry (Ampelopsis brevipedunculata)
Border privet (Ligustrum obtusifolium) Purple loosestrife (Lythrum salicaria)
Common buckthorn (Rhamnus cathartica) Sericea/Chinese lespedeza (Lespedeza cuneata)
Lesser celandine (Ranunculus ficaria) Wineberry (Rubus phoenicolasius)
Multiflora rose (Rosa multiflora)  


LIISMA's Identification Guide to Invasive Horticultural Plants Banned from Sale in Nassau and Suffolk Counties, NY in 2010 was compiled at the request of Suffolk and Nassau counties to help implement the ‘Do Not Sell’ legislation. The ban includes each plant's cultivars, such as Purple loosestrife ‘Morden Pink’ and Lesser celandine ‘Brazen Hussy’.


Banned species found for sale in Suffolk County should be reported to the Suffolk County Department of Consumer Affairs by printing and mailing the complaint form found by CLICKING HERE.


In Nassau County, banned species found for sale can be reported by filing an on-line complaint at THIS WEBSITE. You do not need to see a sale made or make a purchase to use these forms.

3. Ask for non-invasive alternatives

Encourage your nursery to sell alternatives to invasive plants by asking for plants which have similar ornamental characteristics and cultural requirements. Print out and bring Cornell Cooperative Extension’s Alternatives to Ornamental Invasive Plants with you to your local nursery, and help show there is a demand for these notable alternatives.

Eastern Redbud                           Bearberry                                                      Pitch Pine

(Cercis canadensis)                      (Arctostaphylos uva-ursi)                           (Pinus rigida)


Photo by National Park Service                  Photo by Jim Kuhn                                                              Photo by Sage Ross

4.  Detect unusual or harmful plants and report them to LIISMA or iMAP Invasives.

Be on the look out for spreading invasives and new arrivals! Document them by taking photos and collecting specimens.

Japanese Knotweed                     Mile-a-minute Weed                                Japanese Honeysuckle

 (Fallopia japonica)                      (Persicaria longiseta)                                (Lonicera japonica)


Photo by Nigel Mykura               Photo by U.S. Government                                                        Photo by William Rafti,

                                                                                                                                                                    William Rafti Institute

5. Practice EDRR (early detection and rapid response) 

Build EDRR into your strategic plans, management plans, work plans, and performance evaluations.

Allocate 10% of your invasive plant management work to EDRR.

6. Organize, host, or teach a training.

Help coworkers, colleagues, and volunteers to get involved.

7. Practice prevention 

Pick seeds from your boots, wash tires, and apply the prevention Best
Management Practices (BMPs).

8. Keep it going!

Removing that last plant is the hardest part and takes continued commitment.