En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Invasiveness of wild petunia in Austin

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
3 ratings

Sunday - June 15, 2008

From: Austin, TX
Region: Southwest
Topic: Invasive Plants
Title: Invasiveness of wild petunia in Austin
Answered by: Barbara Medford

QUESTION:

Is the wild petunia in the data base as invasive/aggressive as the more common ruellia? In other words, will it pop up everywhere? Ruellia nudiflora (Engelm. & Gray) Urban Common wild petunia, Violet ruellia, Violet wild petunia, Wild petunia

ANSWER:

There are four members of the genus Ruellia that are native to Texas: Ruellia nudiflora (violet wild petunia), Ruellia drummondiana (Drummond's wild petunia), Ruellia humilis (fringeleaf wild petunia). and Ruellia occidentalis (western wild petunia). All are considered Plantwise native alternatives to non-native Ruellia caerulea (Britton's wild petunia), also known as Ruellia x brittoniana "Katie", which is widely available commercially. Ruellia caerulea is on the Texas Invasives list, but whether it is more or less invasive than the natives is a little hard to say. They all seed prolifically, grow well in shady, moist areas, and grow fairly quickly in the warm season. However, information in our Native Plant Database indicates that the Ruellias can be kept under control by mowing. They are all difficult to pull up, because they have a large knot in the root just below the surface of the soil. Many gardeners pick the non-native caerulea because it has been hybridized or selected to provide other colors than the native purple; pink, white and blue, although purple has remained the most popular color. Perhaps the main point in favor of using the natives is that they ARE natives, accustomed to living in their environment, requiring less fertilizer, water and maintenance to do well.

Pictures of non-native Ruellia caerulea


Ruellia nudiflora

Ruellia drummondiana

Ruellia humilis

Ruellia occidentalis

 

 

 

More Invasive Plants Questions

Managing non-native invasive creeping yellow cress in Rio Medina TX
January 10, 2012 - Due to my lawn mower dying and waiting for the shop to fix it my yard got a bit overgrown. I was walking around the yard looking at the blooming wildflowers and have discovered that one of them is Ror...
view the full question and answer

Have invasive plants no useful purpose from Anchorage AK
September 03, 2011 - Does the definition of invasive plants include that the plant has no useful purpose? Thanks.
view the full question and answer

Non-native ligustrum in non-native fescue in Medina TX
May 22, 2013 - Is there an effective way to kill baby ligustrums coming up in my fescue yard without harming the grass?
view the full question and answer

Splitting bark on non-native mimosa from Buda TX
June 24, 2012 - What would cause my Mimosa tree to have splitting bark. I've only lived in this house for 8 months and am learning about this tree. The other tree seems fine. It looks as though it split and then ...
view the full question and answer

Chinaberry trees coming up volunteer
October 14, 2007 - I have several chinaberry trees that have sprouted after my neighbor trimmed his tree. I have cut these trees down to the ground a couple of times, but they just send out new shoots. Any idea on how...
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
© 2014 Lady Bird Johnson Wildflower Center