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
1 rating

Monday - November 15, 2010

From: Tucson, AZ
Region: Southwest
Topic: Compost and Mulch, Transplants, Trees
Title: Problems with Texas wild olive tree in Tucson
Answered by: Barbara Medford

QUESTION:

Planted a Texas Olive tree in Tucson, Az. Some of the leaves are kind of yellow. It gets part sun and part shade and is growing. Is this due to too much water, not enough water or does it need something like Miracle grow ?

ANSWER:

Cordia boissieri (Mexican olive), which also has the common name of Texas Wild Olive is endemic to Texas, which means it is not native to Arizona, and may be in conditions in which it cannot do well. When you follow the plant link above to our web page on this plant, you will notice this instruction in the Propagation Instructions:

"Maintenance: Requires much water to get it established but once established it is drought-tolerant."

From this USDA Plant Profile, you will see that Mexican Olive grows naturally no closer to Arizona than the extreme southern tip of Texas. You did not say how long ago this tree was planted, but transplant shock is quite common in recently planted trees, particularly if they have been planted in what is, for them, an alien environment. If it was planted pretty recently, then we would definitely recommend more water, allowed to drip in very slowly from a hose. The plant also needs good drainage; if its roots are in clay with no compost or other amendments to improve the drainage, the roots may drown in the water it is given.

Pima County, against the southern border with Mexico, is in USDA Hardiness Zones 8b to 9a, while the South Texas area where the Mexican Olive grows natively is Zones 9a to 9b, a little warmer, but probably not enough to make that much difference. It is more likely that lack of water when the tree was being established and possbly poor drainage and/or the wrong soil is causing the difficulty. And, if you planted it in the heat of an Arizona summer, or even fall, transplant shock is almost inevitable.

On the subject of fertilizing, don't. Any plant under stress, and yours obviously is, should not be fertilized. The fertilizer will try to push a plant to grow more profuse leaves, when what that plant is doing is struggling to survive.

From our Native Plant Image Gallery:


Cordia boissieri


Cordia boissieri


Cordia boissieri


Cordia boissieri

 

 

 

 

More Transplants Questions

Post-bloom period care for Pink evening primrose
June 28, 2011 - Hello, I live in Denton, TX. I introduced pink evening primrose as a ground cover to a xeriscaped section of my property a few years ago. I have pretty much left it alone and let it do its thing an...
view the full question and answer

Optimum planting time for perennials and trees
November 02, 2007 - Our group is running out of fall workdays. Is it OK to plant native perennials and small trees in Central Texas during the winter months? Or should we wait now until the spring?
view the full question and answer

Shriveling and dying of non-native impatiens
July 14, 2008 - Several years now many of my impatiens after a month or so seem to shrivel up and eventually die. They are planted in a row and not all are affected. I am not noticing any slug evidence which I would...
view the full question and answer

Moving milkweed to another location in Maine, NY
April 15, 2010 - I live in up-state New York. I have a 'patch' of milkweed growing where I don't really want it to grow - but have left it because the butterflies and bees love it. I would like it to grow in my ba...
view the full question and answer

Madrone too close to house in Oregon
February 02, 2009 - I have a small Madrone tree (8ft tall) located approximatly 15 feet from my house, with a basement. Should I remove it? ie will it damage the foundation and is the tree strong enough that it will no...
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