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 - September 20, 2011

From: Austin, TX
Region: Southwest
Topic: Plant Lists, Trees
Title: Trees suited for rocky, caliche soil of Central Texas
Answered by: Guy Thompson

QUESTION:

I need to replace aging ashes. I have planted 2 Monterey oaks, but I would like to know what else I could plant whose roots will grow well in NW Austin caliche, rocky soil? Thank you.

ANSWER:

There is a wide variety of native trees suitable for your soil.  Let me begin with large trees, mostly oaks.  The most commonly found oaks in your area are Quercus fusiformis (Escarpment live oak) and Quercus buckleyi (Texas red oak).  The former is evergreen and the latter deciduous.  Both grow into large, handsome trees, but they are susceptible to attack by oak wilt.  Oak species that are resistant to oak wilt include Quercus stellata (Post oak), Quercus macrocarpa (Bur oak), and Quercus muehlenbergii (Chinkapin oak). Quercus laceyi (Lacey oak) grows into a medium sized tree in your area.  Ulmus crassifolia (Cedar elm) is also popular in the Austin area and develops yellow-orange leaves in autumn.

Smaller trees worth considering include Cercis canadensis var. texensis (Texas redbud), Sophora secundiflora (Texas mountain laurel), Prunus mexicana (Mexican plum), and Chilopsis linearis (Desert willow).  Except for Desert willow, which needs full sun, the others are generally understory trees that thrive in partial shade but can take full sun.

Check out the characteristics of the recommended trees by clicking on the underlined names.  Note that some grow more slowly than others, if this is a consideration. Attached below are sample images of the trees I mentioned.

 

 

From the Image Gallery


Escarpment live oak
Quercus fusiformis

Texas red oak
Quercus buckleyi

Post oak
Quercus stellata

Bur oak
Quercus macrocarpa

Chinkapin oak
Quercus muehlenbergii

Lacey oak
Quercus laceyi

Texas redbud
Cercis canadensis var. texensis

Texas mountain laurel
Sophora secundiflora

Mexican plum
Prunus mexicana

Desert willow
Chilopsis linearis

More Plant Lists Questions

Plant to trail down concrete block retaining wall in Maryland
September 15, 2012 - Hello, Your website is an excellent resource. Thank you very much! My girlfriend recently bought a house that has a concrete block retaining wall in the front yard. We want to improve the app...
view the full question and answer

Septic Field Recommendations for SW Austin
February 09, 2015 - What would be good native plants to vegetate septic drip fields in both sun and shade in Southwest Austin. The regulations want plants that are evergreen and shallow rooted.
view the full question and answer

Plants for a moist, wooded area in North Carolina
December 06, 2014 - I am looking to plant some native flowers in a wooded area in Surry County NC. The chosen location is fully shaded beside a creek. The water table typically sets about 2 feet below the surface of th...
view the full question and answer

Dense groundcover for full sun on the California coast.
November 08, 2011 - Can you recommend a very dense ground cover that serves as a lawn (in full sun on the coast, pref. drought resistant)? Many thanks in advance.
view the full question and answer

Plants for underneath oak tree
October 10, 2012 - I have a North facing wall of my house that gets half sunlight half shade depending on the season. I would like to layout some native South Texas plants and complete fill in area to prevent the live o...
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