En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Shade tree with non-aggressive roots for next to pool in The Woodlands TX

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
3 ratings

Tuesday - April 26, 2011

From: The Woodlands, TX
Region: Southwest
Topic: Shade Tolerant
Title: Shade tree with non-aggressive roots for next to pool in The Woodlands TX
Answered by: Barbara Medford

QUESTION:

Hi Mr. Smarty Plants. We live in Spring, TX and are looking for a full-sun shade tree to plant in a large planter (about 6'x6') next to our pool. We want the tree to provide shade for our full afternoon sunny back yard, but also do not want an aggressive root system to damage the pool. Do you have any suggestions? Thank you, Kendra

ANSWER:

We don't want to be flip, but have you considered a large umbrella?

Roots of trees generally extend at least as far out as the shadow of the canopy of the tree. This area is referred to as the Protected Root Zone (PRZ). While a tree and its rootball would probably initially fit into your 6' x 6' planter box, the roots will quickly grow beyond it.  Additionally, the roots of the tree have the potential to damage/crack any concrete they encounter as they grow trying to reach water and oxygen.

We are frequently asked for "taproot trees," on the assumption that a root that grows straight down will not interfere with concrete walks, driveways, sidewalks and foundations. Alas, some trees do begin with a taproot but there are few trees with a true taproot; as time goes by roots will spread from that center root, both in search of water and nutrients and also as a base to stabilize the tree in the ground. A tree tall enough, and with comparable width to provide shade for your patio is going to have roots extending far beyond the initial planter, if either the tree or the pool survive the planting there. A tree big enough to cast shade, say, 20 ft. tall, will usually have about the same spread-20' wide. The roots beneath that tree will normally spread out from two to three times farther than the crown.

There are shrubs that might fit into that 6x6 space and not interfere with your pool, but they will not get big enough to cast appreciable shade.

 

More Shade Tolerant Questions

Plants for erosion of shaded slope in Bethesda MD
April 07, 2010 - I have an eastern facing heavily shaded slope in Bethesda, Md. that needs a few good native plants to keep it from eroding. Ferns are not doing well on it. They do much better in the flats. So, anythi...
view the full question and answer

Native grass for sandy soil and shade
May 27, 2011 - We have a sandy soil and lots of shade. Is there a native grass that would do well under these conditions?
view the full question and answer

Wildflowers for high canal bank in Florida
May 27, 2009 - My home is on a canal to a natural lake in Central Florida (Orlando area). I am wondering if there is a wildflower that I can grow on a 3' high canal bank that is mostly shady.
view the full question and answer

Groundcovers for area under blue spruce in Colorado
August 10, 2012 - I have a 40 ft blue spruce limbed up 6 ft in my yard on the west in Greeley, CO (50 mi N Denver, zone 4 or 5). It gets some sun underneath in the later afternoon and evening. Can you suggest 4 to 5 ...
view the full question and answer

Wax myrtle in partial shade in Dothan AL
March 13, 2009 - Will the Wax Myrtle do well in the 36303 area code in partial shade?
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