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
Not Yet Rated

Tuesday - July 21, 2009

From: Fort Worth, TX
Region: Southwest
Topic: Invasive Plants, Problem Plants
Title: How do you get rid of Mexican Petunia?
Answered by: Jimmy Mills

QUESTION:

How do you get rid of Mexican Petunia?

ANSWER:

Mr. Smarty Plants recently answered a question about the eradication of Ruellia, so I am going to excerpt part of the answer here for you.

The Mexican Petunia (Ruellia brittonia {syn. R. Tweediana}) is a native of Mexico. It can be invasive and is listed as a Category 1 invasive species by the Florida Exotic Pest Plant Council. Its invasiveness is enhanced by its fast growth, prolific production of seeds, and an extensive root system.

Regarding getting it out of your garden, you want to limit the use of herbicide in your garden, so one approach is to pull it out, and keep cutting back new sprouts; not necessarily an easy task. You also want to prevent reseeding by removing flowers after they fade so the seed pods won't develop, and also remove new seedlings as they appear. A chemical control method is to use glyphosphate.  Use this very carefully since it can also eliminate all of your other plants. Cut the Petunias down to the ground and apply the glyphosphate to the stumps of the stems. Be sure to follow the directions and warnings on the label.

For more help closer to home, I suggest that you contact the folks at the Tarrant County office of Texas AgriLife Extension.

 

 

 

 

More Invasive Plants Questions

Identification and replacement of chinaberry tree (Melia azedarach)
April 24, 2007 - I am trying to identify and locate a native tree. We live in Fairview, near Allen, Texas. It is in bloom now. It has fragrant small lavender 5 petal flowers in clusters. They develop into yellow/t...
view the full question and answer

Eliminating English Ivy in East Flat Rock NC
April 13, 2010 - In the woods behind our house our neighbor has an invasion of English Ivy. It creeps over and through the fence into our yard, and we want to fight back! I have read the other articles about cutting...
view the full question and answer

Information on non-native, invasive pampas grass
February 12, 2004 - Our neighborhood is doing a community landscaping project and pampas grass has been suggested. Is there a good article related to invasives that specifically mention pampas grass?
view the full question and answer

Invasive phragmites from New Egypt NJ
July 30, 2011 - I have some wetland near a road. It has been taken over by phragmites. How is the best way to remove these grasses and add some diversity to this area. The area in question is approx. 100 by 30 feet.
view the full question and answer

Invasive plant in pond in Kenai, AK
May 02, 2009 - We built a pond in our back yard with materials from the beach. Including some plants. Didn't investigate the plants(our mistake). Well now it has taken over all of our landscape. It looks like ext...
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 | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center