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

Friday - September 26, 2008

From: Aledo, TX
Region: Southwest
Topic: Trees
Title: Distance from wall to plant Eastern red cedar
Answered by: Nan Hampton

QUESTION:

I want to plant a row of Eastern red cedar on the high side of a 2 to 2 1/2 ft large Pavestone block retaining wall, preferably as close to the wall as possible. We have put maybe 4-5" of gravel behind this wall to facilitate drainage, and this should deter root growth toward the wall. How close to the wall can I safely plant these trees? Thank you much.

ANSWER:

Juniperus virginiana (eastern redcedar) generally grows to around 40 feet high, but can grow as tall as 90 feet. Its width at maturity can be 8 to 20 feet wide.  How close to your pavestone wall you choose to plant should be guided by the range of any lateral roots and width of the mature tree.

The US Forest Service database says:  

"Eastern redcedar generally has a shallow, fibrous root system, though roots of mature eastern redcedar trees may penetrate 25 feet (7.6 m) and lateral roots may reach 20 feet (6 m).  Eastern redcedar seedlings have penetrating taproots and may later develop a lateral taproot system.  The deep, early taproot is usually replaced by an extensive, shallow root system with age.  Even 1st year seedlings begin developing a long fibrous root system, often at the expense of top growth.  The root system may be deep where soil permits, but on shallow and rocky soils eastern redcedar roots are very fibrous and tend to spread widely.  The development of a lateral taproot with age may also enable eastern redcedar to persist on outcrops and shallow soils."

The US Forest Service Silvics Manual says that the soil condition determines whether the tree develops a deep tap root or spreading lateral roots.  In thin rocky soil fibrous lateral roots will be predominant; but, if the soil permits, the root system may be a deep penetrating tap root.  So, if your soil is good, you shouldn't have great concern about lateral roots.  

You should probably not plant the trees a distance from your wall that is less than half the width of the mature tree.   Kansas Forest Service recommends a planting spacing for redcedars of 6 to 10 feet and University of Missouri Extension recommends a spacing of 8-12 feet.

Cultivars have been developed that are smaller; for instance, according to the University of Connecticut there is a cultivar, 'Emerald Sentinel', that is a pyramidal, columnar shape that grows to 20 feet high and only 8 feet wide. If this tree sounds as if it is tall enough for you, it could probably be planted 3 to 4 feet from your wall.


Juniperus virginiana

Juniperus virginiana

Juniperus virginiana

Juniperus virginiana

 


 


 

More Trees Questions

Source for Hickory in Texas
March 25, 2015 - I'm looking for a nursery in Texas that sells hickory trees. I've used your supplier links and gone through many, many websites of suppliers. However, the only nut tree anyone sells is pecan. I'...
view the full question and answer

Problem with leaves of Texas Ash in Austin
May 21, 2012 - We purchased a 3' to 4' Texas Ash in March 2012. The past few days I noticed new leaves at the top are curled under, have a milky substance on them, and more than a few ladybugs on them. What is thi...
view the full question and answer

Mail order source for Guaiacum angustifolium from Ft. Worth TX
April 16, 2014 - Do you have a mail order source for the seeds of Guaiacum angustifolium? I have looked extensively and cannot find one. Thank you!
view the full question and answer

Acorns for craft project in Santa Rosa CA
October 05, 2009 - Where can I find mature northern red oaks, northern pin oaks in Santa Rosa, CA 95404 in order to get their cute chubby acorns for a craft project I'm doing?
view the full question and answer

Propogating snowbells from Elmendorf TX
June 06, 2012 - Is it possible to propagate Styrax platanifolius and Halesia diptera from cuttings? If yes, what is the process?
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