En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

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

Controlling Triadica sebifera (Chinese tallow tree)
July 20, 2013 - We are trying to remove Chinese tallow trees from the lake bed on Lake Buchanan. We cut them down, but they grow back from the roots. They are very hard to dig out. Do you have any suggestions for how...
view the full question and answer

Getting rid of giant ragweed in Austin
October 25, 2008 - How can I get rid of a large field of giant ragweed? Part of the site is a steep slope, which is difficult to mow. I want to encourage native grasses but they are crowded out by the ragweed.
view the full question and answer

Advisability of growing Silybum marianum (Milk thistle)
November 26, 2013 - I just received a load of clay-mix-dirt - and after our recent rains noticed the pile sprouting what looks like "Milk Thistle." Lots of them. The leaves are spiny and variegated - quite pretty. ...
view the full question and answer

Flowering landscape plants for Montgomery TX
March 07, 2013 - Hello I live in Montgomery TX. I am looking for low growing evergreen flowering plants for the front of my three deep beds. The first plant closest to the foundation is loropetalum, then I have a blue...
view the full question and answer

Dog-proof grass from The Woodlands TX
April 26, 2013 - I am looking for a hardy grass that can tolerate female dogs urine. Zoysia was suggested but I am concerned about it being invasive. Any suggestions?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center