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

Thursday - May 20, 2010

From: Tucson, AZ
Region: Southwest
Topic: Transplants, Trees
Title: Will Texas Mountain Laurel roots damage pipes in Tucson AZ?
Answered by: Barbara Medford

QUESTION:

We have a Texas Laurel tree in our back yard,and it is doing fine, and we are are planning to put another one in the front yard close to the house will the root system attack our pipes ? no septic system.

ANSWER:

Do you mean a Texas Mountain Laurel, Sophora secundiflora (Texas mountain-laurel)? We will assume that is the tree you are considering. We were concerned when we discovered that it is not listed as native to Arizona in our Native Plant Database; however, we then found this article by Master Gardeners on a Pima County Cooperative Extension website, Texas Mountain Laurel. You say you already have one in your yard, so obviously they must be able to live in Arizona.

When you inquire about the roots of this tree attacking your pipes, are you referring to sewer pipes or water lines? The Mountain Laurel has a sparse root system but a deep taproot, an adaptation for survival in desert conditions. Once upon a time, when most sewer lines were clay, like the clay pots,  invasive roots did, indeed, break them up and cause major problems. Nowadays, both water and sewer pipes are more often a heavy-duty plastic material, and don't have as much trouble with roots. The mountain laurel is very difficult to successfully transplant because of that taproot-damaging it in transplanting can be fatal to the tree. We would suggest that you first acquaint yourself with the location of the pipes you are concerned about, including the depth they are in the ground.  You did not say if you intended to plant seeds or purchase a tree for transplanting, but it would be a good insurance policy to not dig the hole for the tree directly over those pipes. The resources we searched made no mention of intrusive roots from this tree, just cautioned about the difficult of transplanting the tap root, as well as warning that the tree grows very, very slowly.

From our Native Plant Image Gallery:


Sophora secundiflora

Sophora secundiflora

Sophora secundiflora

Sophora secundiflora

 

 

 

 

More Trees Questions

Want a source for Mexican redbud in Houston, TX
October 04, 2010 - I live in west Houston and would like to purchase and plant a Mexican redbud in my yard. I have Googled to find one and also searched the Growit site without success. Where can I find one in Texas? I ...
view the full question and answer

Coconut in a husk from Round Rock TX
January 26, 2011 - Looking for a coconut in its complete husk ?
view the full question and answer

Patio Privacy Screen Suggestions for Central Texas
March 17, 2013 - I have just built a patio and want to plant some small trees, bushes or shrubs to form a visual barrier (rather than to erect a fence)to the neighbors yard.
view the full question and answer

Safe distance from foundation for Sycamore from Preston UK
August 24, 2011 - What would be the safe distance to have a sycamore tree near your house so it doesn't affect the foundations?
view the full question and answer

Hedge for steep slope by sidewalk in Wisconsin
August 25, 2008 - I have a fairly steep slope from the sidewalk to my yard. The space is about 48" high, 30" deep and 120' long. I was thinking that a boxwood hedge would fill that space nicely but no one else aroun...
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