En Español

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?


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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

rate this answer
1 rating

Tuesday - April 13, 2010

From: Pasadena, TX
Region: Southwest
Topic: Diseases and Disorders, Planting, Transplants, Trees
Title: Laurel oak tree not leafing out in Pasadena TX
Answered by: Barbara Medford


Hurricane Ike blew down our red bud in the backyard. Had a large 25' laurel oak planted early March 2010. When it was put in the ground, the leaves were on it, but they were all brown and dried. The tree has not shed the leaves in the past 6 weeks. The branches are supple, so we think the tree is alive. Do you think this tree suffered a freeze in the container last winter? Should we give it more time to drop and sprout new leaves or tell the supplier to take it back?


Quercus hemisphaerica (Darlington oak)  (also known as a Laurel Oak) is shown in this USDA Plant Profile as growing in some counties on the Texas coast, not necessarily in Harris County, but close, in USDA Hardiness Zone 9a. The person who wrote this Floridata article on Laurel Oak is obviously not too fond of it. From that article:

"Laurel oak is tardily deciduous, meaning it drops a few of its old leaves during the winter, but sheds most of them all at once as the new leaves unfurl and flowering begins in early spring."

This indicates to us that your tree should now have some leaves and  blooms on it, because oaks sure are blooming (and driving everyone crazy) here. Try the thumbnail test: scrape a very thin layer of bark off an upper branch, and work down doing the same thing going down the tree. If there is a thin lining of green under the bark, there is still hope. If there is any other color, the tree is done for. 

A 25 ft. oak is a pretty big tree to be transplanting, and if it is not showing signs of life, we might blame it on that. Was it planted by you or the nursery from which you purchased it or an arborist? From Helium.com Tips for Transplanting Oak Trees:

"Transplanting an oak is a labor-intensive task. Oaks are most easily transplanted when they are small (under three feet tall) and less than three years old. Oaks develop a taproot that often can be almost as long as the tree is tall. Cutting the taproot usually results in the tree dying within months after it is planted. For this reason substantial digging is required so the whole tree (taproot and the root mass) can be removed from the hole."

From Duke University, here are some pictures of the leaves and bark of this tree. There seems to be some confusion on exactly what tree the Laurel Oak is; read this article from the University of Florida Extension on Laurel Oak or Swamp Laurel Oak? Nursery retailers sometimes take some liberties with common names, and the one you have might not even grow well in your area. 

So, to get down to your question: Should it go back to the nursery? Well, first, do you have a warranty from the nursery? If you do, and it has to show signs of growth within a certain amount of time, you should definitely go in and talk to whoever sold it to you. As to whether it had suffered because of the freezes we had during the Winter; certainly if the tree was in an exposed location, rooted in a plastic can, and the temperatures got pretty cold, it could well damage the roots. We all had some unusual weather this year, but it's not a given that the temperatures ever got cold enough in South Texas to do damage. Even so, we would recommend that you go back in to the retailer, look at any Laurel Oaks that they have in stock, and see what they look like. 

Finally, we really can't say why your tree has not leafed out. We feel the top candidate for the problems is the transplanting of a tree that is too big to survive it. 

Pictures of Quercus hemisphaerica (Darlington oak) from Google. 



More Diseases and Disorders Questions

Possible Herbicide Contamination of Soil
July 07, 2016 - My mother will be 80 this year and lives in Houston, Texas. She has a raised bed garden near her neighbors fence. It has been there for many years. She feels that he uses Roundup for his weeds near a...
view the full question and answer

Need help with a 50 ft Tulip Tree with storm damage in Brownsburg, IN.
June 30, 2010 - I have a 50 ft Tulip tree that suffered storm damage. One for the main branches split at the top fork and fell. It has left about 6 ft of exposed wood but there are still a couple of main branches in...
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

Problems with Purple Heart in Raleigh, NC
December 24, 2014 - I was hoping you could help me with an indoor/outdoor houseplant issue. I have a purple heart, that lives outside in the summers and indoors in the winters. I brought it in a few weeks ago and am no...
view the full question and answer

Care of Jade plant
September 06, 2007 - Hi there, I have a question and really appreciate your time helping me regarding my plant. I bought a Jade plant; 35 yr. old ; very thick stems and healthy at the time of purchase from a very si...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2016 Lady Bird Johnson Wildflower Center