Explore Plants

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
    
 

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

Monday - April 12, 2010

From: Austin, TX
Region: Southwest
Topic: Invasive Plants
Title: Problems with pink oxalis in Austin
Answered by: Barbara Medford

QUESTION:

I have a bed of pink oxalis. The leaves are turning rusty and withering. It is spreading. Can you tell me how to remedy this?

ANSWER:

There are 10 members of the genus Oxalis native to North America and 6 to Texas, none of which has the common name "pink oxalis." Oxalis is the largest genus in the wood-sorrel family, and the only Pink Oxalis we could find is Oxalis articulata, pink wood-sorrel, native to South America, particularly Brazil and Argentina. Since the Lady Bird Johnson Wildflower Center is dedicated to the use, protection and propagation of plants native not only to North America but to the area in which they are growing, this plant is out of our expertise. We can tell you that we found sites that called it an "invasive weed," and know it is very difficult to eradicate from where it is unwanted because of its underground tubers. It is cold-tolerant to USDA Hardiness Zone 8b; Austin is Zone 8a. That's close enough and, in view of the hard freezes we had in the Austin area this year, might have been sufficient for you to be seeing freeze damage. In addition, the wood-sorrels ordinarily die back and disappear as warmer weather approaches. If you don't want it in your garden, due to its invasive nature, you might consider getting it out now, while you have the chance. However, the tiniest little bit of the bulbil from which the plant grows will produce more of it. 

Pictures of Oxalis articulata from Google. 

 

More Invasive Plants Questions

Removal of mature agaves
November 20, 2007 - Hello- we live in Austin, TX and have a bed of different varieties of agave. They are near the walkway to our house, and are so out of control they pose a hazard to our guests walking up to the house...
view the full question and answer

Eliminating black locust volunteers in Rockville MD
September 27, 2011 - I am a landscape designer whose client has a very large, mature black locust in her front yard. Not surprisingly, she also has multitudes of black locust volunteers popping up all over her yard. The...
view the full question and answer

White evening primrose from Baton Rouge LA
April 16, 2013 - My husband and I have a disagreement about Mexican Primroses. I believe I have seen patches of them which are pure white. He believes they must be faded pink ones. Do white ones occasionally grow? ...
view the full question and answer

Eradicating trumpet vine runners in Austin
April 29, 2012 - How do I eradicate trumpet vine runners from my lawn? Will it kill my pecan tree?
view the full question and answer

Name of the rough-barked mimosa (Albizia kalkora)
February 12, 2008 - I read two years ago that there was two different mimosa trees one that is common and has the smooth bark and the other one had a rough bark. I am Interested in the one who has the rough bark and the ...
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.