En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Further explanation of retaining walls and trees from Washington MO

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

Monday - March 11, 2013

From: Washington, MO
Region: Midwest
Topic: Erosion Control, Trees
Title: Further explanation of retaining walls and trees from Washington MO
Answered by: Barbara Medford

QUESTION:

I had a question previously about putting retaining walls across the root system of a 40' tall bald cypress tree(not like spokes on a wheel, but concentric to tree trunk). How wide can the walls be? How deep can the dirt backfill behind the walls be? How far away from the trunk should the walls stay? I am only asking how to minimize stress to the tree, not how to engineer it. My choice of words gave you the wrong direction to proceed with your answer. Please address only the plant/tree issue for me.

ANSWER:

Sorry we got so wrapped up in the rain garden issue we forgot the tree root issue. In fact, we had a reference to tree wells in our original answer and removed it because the answer got so long. For anyone interested in seeing how we goofed up, here is your previous Mr. Smarty Plants question.

Basically what you are asking about is Tree Wells. This article, we believe, actually addresses the questions you have, and much better than this mathematics-challenged gardener could. It has diagrams, a discussion of grade changes, the distance a wall  should be from a tree trunk, weep holes, etc. Since you can actually see your tree, the incline and soil type, hopefully this will answer all the questions we did not.

 

More Erosion Control Questions

Plantings for sides of retention pond in Willits CA
July 02, 2012 - I am looking for recommendations for ground cover for the outside of embankments which impound wastewater. This is to improve the aesthetics and deter weeds. The slopes are 1V:2H, so if we can avoid...
view the full question and answer

Plants for steep clay bank in Summerfield OH
April 07, 2012 - Hello, We have a steep 15-20 foot high bank behind our house here in southern Ohio. Probably 50 ft.long. What could we plant for beauty and erosion control. It is nasty clay soil with lots of shale an...
view the full question and answer

Getting rid of non-native, invasive English Ivy from Davidsonville MD
March 19, 2014 - Just moved and need to rid the well established Ivy planted on the steep slope area around the back and side of the house as it is taking over the bushes on the top and trees in forested area at botto...
view the full question and answer

Need plants to control erosion on a hillside in Nashville, TN.
February 28, 2012 - Recently, a rogue contractor scraped all the sod off of my Tennessee hillside. Now the clay soil is exposed and washing away quickly. The hill slope is approximately 30 degrees. In the spring I'd ...
view the full question and answer

Landscaping on South Padre Island
June 07, 2008 - I'm in charge of landscaping at my beachfront condo in South Padre Island and find the wind, salt air, and heat challenging for growing almost anything. We would like to incorporate native plants, b...
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