En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Patio materials under a native oak trees in Missouri

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 02, 2009

From: Lees Summit, MO
Region: Midwest
Topic: Trees
Title: Patio materials under a native oak trees in Missouri
Answered by: Barbara Medford

QUESTION:

Is it safe to build a pavestone patio (with gravel sub base, Geo tech 101 fabric and sand bed..around two 50+ year old native oak trees? I know concrete would compact and cause damage to the surface roots and inhibit moisture absorption...won't a pavestone patio with the other requirements do almost the same damage? Do you have other suggestions?

ANSWER:

You could certainly give the Pavestone a try, but the reason your oak trees have been there so long is because they are survivors, and probably won't hesitate to take on those pavers. It wouldn't be long before the surface would became uneven, as roots underneath pushed up toward oxygen and water. Our recommendation would be to consider either a raised wooden deck or simply mulching for a comfortable attractive ground cover under the tree. Read on for some additional information from previous Mr. Smarty Plants answers.

"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). Covering this area with concrete is likely to cause the death of the tree by physically damaging the roots and by inhibiting oxygen and water from reaching the roots. Additionally, the roots of the tree have the potential to damage/crack the concrete as they grow trying to reach water and oxygen.

There are a number of permeable paving materials that you might consider instead of concrete. These include such materials as paving bricks, flagstones or patio blocks as long as they are laid without mortar. You can find more types of permeable pavers here. Another possibility is a raised wooden deck that could go right up to the edge of the tree with no harm as long as its foundation didn't damage the roots of the tree.

You can read more about protecting trees from damage during construction projects and advice about placement of pavement in the area of trees in  Protecting Trees from Construction Damage: A Homeowner's Guide from the University of Minnesota Extension Service.

You can find a list a Landscape Professionals near your area who could advise you on permeable paving materials in our National Suppliers Directory. You might also try your local library or bookstores for books on alternatives materials for patios (e.g., Taunton's Deck & Patio Idea Book or Sunset Ideas for Great Patios and Decks)."

 

 

More Trees Questions

Difficulty with Clay Soil from Palm Bay, FL
August 22, 2012 - I had a very nice little native shady area behind my house for over 40 years, but now it has been cleared except for a 100 foot tall live oak in the center of this raised mound (50' x 80'). I've be...
view the full question and answer

Small flowering tree for MS
March 21, 2011 - I had to cut down some trees that had grown too close to my foundation, but would like to re-plant something a little farther from the house (12-16 feet away) that would still serve as a screen outsid...
view the full question and answer

Huisache blooms when freeze is over
May 02, 2005 - I live in San Antonio, TX and have heard that when the Huisache blooms all danger of frost or freeze is over. Is that true? And, this year to date (April 22, 2005) we have not seen the Huisache bloo...
view the full question and answer

When do bigtooth maples (Acer grandidentatum) seeds mature and fall?
December 04, 2009 - Hello, In answer to a previous question, you said that Bigtooth Maple samaras come ripe around August-September. Recently, I went to Lost Maples State Natural Area, and in their display, it says...
view the full question and answer

A year and a half old live oak tree is doing poorly in Nevada, TX.
May 08, 2012 - We planted a live oak tree about a year and a half ago. the tree is still rather small. The leaves are of a vibrant green, however the leave have only grown through the center of the tree and not out...
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