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 Problem Plants Questions

Controlling poison oak or poison ivy in Iowa
April 29, 2010 - We recently purchased a property that is VERY wooded and has been vacant for two yrs. with little upkeep previously. We have (we were told) l00 yr old poison oak vines hanging from trees. We hired so...
view the full question and answer

Getting rid of Adams needle (Yucca filamentosa)
June 24, 2009 - My friend is changing her flower beds around and is wanting to eliminate an Adam's needle that has been there for several years. She has already dug it up and now is trying to get rid of all the new...
view the full question and answer

Fast-spreading desert-type tree with thorns in yard
July 21, 2014 - There is a fast spreading tree in my backyard - many multiple almost symmetric flat green oval leaves on either side of the stem (sort of like a moringa tree but this is not that). Grows straight up, ...
view the full question and answer

Skin allergies; is Juniper the culprit in Simi Valley, CA?
July 21, 2012 - My husband and I have had terrible skin allergy problems this spring (for me it's been 3 years) and think it may be the juniper bushes outside our bedroom and kitchen windows. Is there a fast growin...
view the full question and answer

More on bluebonnets
March 10, 2003 - Clover has taken over and just about covered the Bluebonnets. Is there any way of removing the clover such as with fertilizer or something else?
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
© 2015 Lady Bird Johnson Wildflower Center