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

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 don't want to spray 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

Native alternatives for Chinest pistache
September 06, 2007 - We live just outside Kerrville on a lot with shallow soil over rock. We have built a raised bed for a shade tree and were considering a Chinese Pistache. However, I have since heard that they don't...
view the full question and answer

Native replacement for bamboo from Houston
May 21, 2013 - I've read one reply where you do not advise using Bamboo as a privacy fence plant. What do you suggest in its place? The suggestions on the one I read will not work for me. Your suggestions were My...
view the full question and answer

Invasive iceplant in Hawaii
October 29, 2008 - Last time I checked Hawaii was in North America. Invasive or not, iceplant continues to be a much used ground cover etc for golf courses, sides of the freeway and many many City and County projects pr...
view the full question and answer

Plants to replace Polygonum cuspidatum ( Japanese knotweed)
August 10, 2013 - I live in a heavily wooed area of Chippewa Falls, WI. Our property is covered with Giant Japanese Knot Weed. We have been trying to get rid of it for years. We are finally going to try using the dr...
view the full question and answer

Non-native Silver lace vine invasive from Ft. Davis TX
July 29, 2011 - Is silver lace vine invasive?
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