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 Transplants Questions

Soaptree yucca falling over in Mesa AZ
July 24, 2013 - My soaptree yucca is about 5 ft tall and has fallen over. Does this plant require staking for I thought not, or is something else going on with it?
view the full question and answer

Caterpillars on Mountain Laurel from Austin
July 25, 2013 - My 1-yr old mountain laurel has been decimated by small yellow and black catepillars. It recovered a bit and pushed out some fresh new growth, and more came and decimated that too. Are these caterpi...
view the full question and answer

Plant for part sun in Nampa Idaho
May 20, 2010 - What could I plant in arid SW Idaho on the northwest side of my house along a border against the house? Most of the day this area is in shade, but at the hottest time of the day it gets a couple of h...
view the full question and answer

Transplanting a Century Plant in Pennsylvania
July 08, 2008 - When is the best time to transplant a Century Plant?
view the full question and answer

Leaves falling off live oak tree in Eureka TX
August 22, 2009 - I have the same question; it is in Navarro County in August. The leaves are falling off my live oak tree, they are brownish yellow, but it is not oak wilt. What might it be? This year I put mulch arou...
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