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
1 rating

Friday - March 26, 2004

From: Washington, DC
Region: Mid-Atlantic
Topic: Invasive Plants
Title: Smarty Plants Exotic Species
Answered by: Jil M. Swearingen, National Park Service

QUESTION:

What Makes an Exotic Species Invasive? (When is a Guest a Pest?)

ANSWER:

Many non-native species exist in apparent harmony in environments where they were introduced. For example, a relatively small number of exotic plants (e.g., corn, wheat, rice, oats) form the basis of our agricultural industry and pose little to no known threat to our natural ecosystems. The most important aspect of an alien plant is how it responds to a new environment. An invasive species is one that displays rapid growth and spread, establishes over large areas, and persists. Invasiveness is characterized by robust vegetative growth, high reproductive rate, abundant seed production, high seed germination rate, and longevity. Some native plants exhibit invasive tendencies in certain situations.
 

More Invasive Plants Questions

Control of Roosevelt weed in Hays County, TX
August 29, 2006 - Roosevelt weed is rapidly taking over the ranchette which we have purchased in Hays County. Any suggestions for reducing or eliminating its presence will be appreciated. Thanks.
view the full question and answer

Comments on previous answer on non-native invasives from Raleigh NC
March 27, 2014 - https://www.wildflower.org/expert/show.php?id=7827 This answer is incorrect. Please have someone review it to remove the two invasive species you are encouraging people to plant by calling them nati...
view the full question and answer

Eliminating evasive Celastrus orbiculatus (Oriental bittersweet)
July 21, 2013 - I have Oriental Bittersweet growing pervasively in my shrub garden, strangling my shrubs and growing into my beautiful Victorian porch. I can't keep up with it! What can I do?
view the full question and answer

Removal of mature agaves
November 20, 2007 - Hello- we live in Austin, TX and have a bed of different varieties of agave. They are near the walkway to our house, and are so out of control they pose a hazard to our guests walking up to the house...
view the full question and answer

Controlling switchgrass in Fredericksburg TX
June 12, 2010 - How do you kill switch grass..too much has grown on our property. Originally planted to stop erosion due to oak wilted trees lost on hill behind house, which worked,but now it is everywhere.
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center