En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - What to do with a sickly American elm in Austin, Texas

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 - September 27, 2010

From: Austin, TX
Region: Southwest
Topic: Compost and Mulch, Diseases and Disorders, Trees
Title: What to do with a sickly American elm in Austin, Texas
Answered by: Marilyn Kircus

QUESTION:

I have an American elm that is about 6 feet tall in my yard. It is has not grown quickly this year--as compared to another American Elm that I have in another spot that is about 3 feet tall and has more than doubled in size this year. Anyway it has spots on all the leaves, white spots and brown spots, maybe some black. I thought about picking the leaves off and throwing them away, but the tree would be bare. Should I do that? Should I spray is with something? If so, what?

ANSWER:

Ulmus americana (American elm) is native to the Austin area, but unfortunately, elms are notorious for being susceptible to various pests and diseases, including the deadly Dutch elm disease.

Since we are neither plant pathologists nor entomologists, we can't diagnose your tree's problem nor recommend treatment. However, County Extension offices do have information on plant diseases and bugs in their area, so we suggest you contact the Texas A&M AgriLIFE Extension Office for Travis County. Since the elm is a valuable tree, you might also contact a certified arborist who can tell you what, if any, treatment is advisable, and recommend a procedure.

Plants are more likely to get diseases if some of their needs are not being met.

Check for:

Soil compaction.

Tree getting too much or not enough water - be sure to water deeply.

Could tree be in caliche?

Tree getting enough sun?

Can you see any differences in soil, compared to the soil the other tree is growing in?

Putting compost around the tree and spraying with compost tea helps some trees rid themselves of various diseases.

Keep trees mulched starting about one foot from the trunk and going out to the drip line.  This will help retain water and keep the roots cooler on hot days.

From our Native Plant Image Gallery:


Ulmus americana


Ulmus americana


Ulmus americana


Ulmus americana

 

 

 

 

 

More Trees Questions

Old oak tree dropping leaves in Hazlet Township NJ
July 08, 2013 - I am 84 yrs old and have a 50 year old pin? oak. No more acorns, but the leaves are falling in clumps and are still alive. Every day I fill a huge garden bag with them. I live on a fixed income and...
view the full question and answer

Do I need to plant a male winterberry? yes
October 19, 2007 - I planted a female winterberry in early July & although I have been watering it regularly the leaves turned brown on the tips in Sept. No berries yet so will I have to plant a male? Thanks, Carol
view the full question and answer

Native evergreen for privacy shield in Weymouth, MA
April 28, 2009 - I am trying to find a good native evergreen tree that I can plant in a hedgerow to block noise and light coming from our neighbors property. We would need something that would grow tall because our h...
view the full question and answer

What will grow under neighbor's overhanging tree in Grosse Pointe Woods MI
May 29, 2011 - My next door neighbor has a beautiful tree that is easily 60 years old and thus not going anywhere. Unfortunately, for me the roots of this tree have extended under a large corner of my back yard. Add...
view the full question and answer

Runaway growth on mountain laurel in Coolidge AZ
July 01, 2010 - I have 2 mountain laurels. They are thriving well. In fact one is growing way too fast. I am growing it as a tree, but the branches are in excess of 6 feet, while the trunk is only 18 or so inches. I ...
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