Rent Shop Volunteer Join

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

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
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 Pests Questions

Dry browning leaves on Monterrey Oak from San Antonio
August 08, 2013 - I have a Monterey Oak that was planted four years ago and was doing great until the last two weeks. It has turned brown and the ends of the branches are very dry and brittle. The root flare was cov...
view the full question and answer

Problems with non-native yellow lantana from Elgin TX
June 17, 2012 - Why do my yellow lantana buds turn brown and do not open fully? The sprinkler system does not spray onto the lantana.
view the full question and answer

Danger of lichens damaging trees
September 26, 2007 - My mom lives east of Buda, Texas where she has planted many different kinds of trees, which are all over 10 years old. Now, they all have a moss or lichen growing on the bark of the trees. She is worr...
view the full question and answer

Death of lantana in Bryan TX
March 28, 2013 - I would like to know what killed several new gold lantana in a single bed that died over the winter. They looked quite healthy last fall. I have several other new gold lantana that survived the wint...
view the full question and answer

Weedy buffalo grass from Dripping Springs, TX
March 07, 2013 - I have a buffalo grass lawn. It is thin and filled with weeds. I would like to find a solution to improve my lawn. I prefer a native grass but I need to be able to control the weeds and I am not ph...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.