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?


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
2 ratings

Tuesday - March 19, 2013

From: Buda, TX
Region: Southwest
Topic: Problem Plants, Turf
Title: How to control Yellow Woodsorrel in Habiturf?
Answered by: Joe Marcus


Last year we planted Habiturf in our front lawn and prepared the ground as directed with organic compost. This year we have an infestation of low growing yellow oxalis which we believe came in with the compost as we have not had this before. What do you recommend as a control? as weeding will not get all of it and the areas are large. We are considering using an herbicide knowing it will knock out our grass but then we will reseed.


Yellow Wood Sorrel, Oxalis stricta, and Slender Yellow Wood Sorrel, Oxalis dillenii, both North American natives, are often unwanted visitors in lawns, especially newly-establish or unhealthy lawns.  As your lawn matures and develops a denser stand of grass, broadleaf weeds like Wood Sorrel will be less of an issue.  Promoting healthy grass growth will eventually pay off in reduced weed infestation.

There are broadleaf herbicides labeled for use on oxalis.  These chemicals are specific to dicot weeds and will not kill grasses and other monocots if used properly.  We take neither a pro nor con stance on garden chemicals, but only urge those choosing to use them to do so in a manner that is safest for them and the environment and to strictly adhere to label directions.

Other than hand weeding, we know of no effective organic control for Oxalis species.


More Turf Questions

Short wildflowers to interplant with grass in PA
July 05, 2011 - I live in NE PA and would like to grow short wildflowers throughout my yard mixed in with my grass. Is this possible? If so, what would be a good match for my zone? I will be mowing the grass once a w...
view the full question and answer

Elimination of non-native, invasive King Ranch bluestem in lawn
June 06, 2006 - How can I eliminate an annual infestation of king ranch bluestem in my bermuda lawn? Thanks.
view the full question and answer

Can Habiturf™ be hydromulched?
July 28, 2014 - Our lawn was originally planted with "Weeping Love Grass" seed by hydromulching. After 7 years we still have some bare spots. Other types of grass have infiltrated the lawn and that does not matter...
view the full question and answer

Native grass for Round Rock, Texas lawn
November 12, 2008 - Hello, I just moved into a new place and the grass in the back yard is very spotty. I would like to know the best seed to put down to cure this problem. Thank you.
view the full question and answer

Bermuda grass and St. Augustine for lawn in Hawaii
June 21, 2009 - Is bermuda grass and st.augustine grass a good mixture for my backyard lawn?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2015 Lady Bird Johnson Wildflower Center