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 - April 20, 2012

From: Sun City, AZ
Region: Southwest
Topic: Pests, Trees
Title: Problems with Texas Ash from Sun City, AZ
Answered by: Barbara Medford

QUESTION:

What might be causing the leaves on my Texas Ash tree to have brown spots and curl up and die?

ANSWER:

For openers, our Native Plant Database lists Fraxinus texensis (Texas ash) as being native only to a strip down the center of Texas and a small part of Oklahoma. We understand it is rare in the trade. Sometimes trade names are used that do not match up with the common name usually accepted for a plant, so  it may be that your tree is either some other ash or is a hybrid, which means it will not appear in our database.

Another possibility is that you have a cultivar of Fraxinus velutina (Arizona ash) with the trade name of Fan-Tex. Here is a previous Mr. Smarty Plants answer that will give you some information on that. This USDA Plant Profile Map shows the Arizona Ash does, indeed grow in Maricopa County, while this map on Fraxinus texensis (Texas ash) does not show it growing in Arizona at all.

There are so many things that can cause ash leaves to exhibit the symptoms that you list, we are going to refer you to a website from Iowa State University Common Problems of Ash Trees that has pictures and descriptions. Once you have read that, we suggest you contact the University of Arizona Extension Office for Maricopa County. Regardless of which ash tree you have, if others are having the same problem the people in the Extension Office should know about it. 

 

From the Image Gallery


Texas ash
Fraxinus albicans

Texas ash
Fraxinus albicans

Arizona ash
Fraxinus velutina

More Trees Questions

Texas native peach from Elmendorf TX
January 30, 2013 - Does Texas have a native peach tree that grows wild?
view the full question and answer

Colony of bees nesting in sycamore
July 06, 2010 - I have a very large, old sycamore tree that has recently become home to a colony of honey bees. They have taken up dwelling in a hollow limb of the tree about 25 feet off the ground. While this is gre...
view the full question and answer

Transplanting a magnolia tree in Avon IN
July 04, 2009 - We moved in our house a couple of years ago,We have a small Magnolia tree, well, looks like a bush right in front of our porch. We want to move it but do not know the best time to move. Can you tell m...
view the full question and answer

Leaf problems on Arizona ash in New Braunfels, TX
August 07, 2010 - I have an Arizona Ash tree that is 10 years old. The leaves have brown spots all over and then eventually the leaves curl up and fall off the tree. Is this a fungus or a bacterial infestation? What...
view the full question and answer

Neighbor's Arizona ash roots in Houston
September 30, 2009 - There is a huge Arizona Ash tree in my neighbor's yard. Its trunk is about 27 feet away from the foundation of my house and its foliage reaches my roof. I am planning to dig a trench on my side of t...
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