En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Monday - November 26, 2012

From: New York City, NY
Region: Northeast
Topic: Invasive Plants, Non-Natives
Title: Most invasive, noxious plant in U.S. from New York City.
Answered by: Barbara Medford

QUESTION:

I was wondering, what is the most invasive/ noxious plant in the U.S? Thanks in advance.

ANSWER:

The most invasive/noxious plant in the U.S. is the one in your yard, or in a nearby nature preserve, or waters where you like to fish and boat. They are almost invariably introduced,  non-native plants that were brought in from Asia or Europe with good intentions, for groundcover or lumber or just as an ornamental. Sometimes the invasive arrives in your area as a stowaway seed in a shipment of seeds, perhaps grass seeds, from a foreign country. If the seeds or imported plants find favorable climate but no animals or insects that will graze those plants they will prosper. Left in their natural habitat, over the millennia, the plants and the grazers or the humans searching for fuel will reach some sort of natural balance. Invasiveness or noxiousness is in the eye of the beholder. We will try to find some references to noxious and/or invasive plants in the New York area, and perhaps some others in other parts of the U.S. that just haven't managed to spread to your area yet, or for which your climate is not favorable.

An article from the United States National Arboretum details the following plants as being outstanding invasives: Lythrum salicaria (Purple Loosestrife), native to Europe, Asia, and Australia, Ailanthus altissima (Tree of Heaven), native to China and Taiwan, and Hedera helix (English Ivy), native to Asia and Europe, as being outstanding leaders in the North American invasives field. Each plant link will take you to additional information on that plant.

To focus in a little more on invasive plants in your area, here is an article from the Cornell University Ecology and Management of Invasive Plants Program.

 

More Invasive Plants Questions

Identification of fast-growing weeds with orange flowers
July 14, 2013 - I have fast growing plants (weeds?) in my heavily wooded backyard. They reach heights of over 6 ft and have orange flowers. I have spent hours searching the web today with no success -the closest thin...
view the full question and answer

Poverty plant overgrown in Austin
June 06, 2012 - We have a poverty plant that is too big for its space in our yard. We like it and want to keep it. Can it be transplanted easily? What about pruning it.
view the full question and answer

Dietes bicolor invasive from Brisbane Australia
April 01, 2013 - We have dietes bicolor growing in our garden. I am changing the type of garden and cannot seem to kill it. I've dugged it out, spent too many weekends pulling out every new shoot, used poison, but t...
view the full question and answer

Invasive introduced sandburs in Maui, Hawaii
November 12, 2008 - I live in Maui, Hawaii & I have a serious problem with Cenchrus spinifex and/or Coastal sandbur grass (weed!) it is everywhere, in my flower beds, in my gravel yardscape. Every time I pull it out it d...
view the full question and answer

Non-native invasive chickweed in Collegeville PA
December 31, 2011 - My problem is chickweed. I have found considerable information on how to eliminate the chickweed. My question is after following a suggested elimination process: How and when do I reseed with grass?...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center