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
1 rating

Monday - July 23, 2007

From: tyler, TX
Region: Southwest
Topic: Trees
Title: Cause of chlorosis on dogwood
Answered by: Joe Marcus

QUESTION:

Help!! I have been gone for three days, when I came home and looked out my back door I discovered that one of my huge dogwoods was turning yellow. We have had more than our share of rain this year and the major lack of rain just last year. We live on a hill with lots of iron ore clay and rock, so we get pretty good run-off where this tree is. Can you tell me anything?

ANSWER:

We can give you some direction, but we're afraid that we can't solve the mystery of your dogwood's problem.

Yellow foliage (chlorosis) on dogwood is often a sign of iron deficiency. Since you enjoy iron-rich soil, and your other dogwoods are not exhibiting any chlorosis, that is not likely the cause of the problem you describe.

Yellow foliage can also be a sign of a disease. I suspect that is the problem with your tree. Vascular fungus diseases are often first noticed when leaves turn yellow or red, wilt or get burnt edges. Crown canker disease is the most likely problem that we can think of, but it could also be a root-rot disease.

To find out for sure what is causing your tree's leaf chlorosis, you will need to get some local help -- someone who can look at your tree and possibly examine parts of it. A professional arborist would be your best bet for identifying the problem and recommending a solution. You might also consider contacting your county's cooperative extension service agent for information and possible disease diagnosis.

 

More Trees Questions

Are the moths in my Austin, TX live oaks harmful?
November 03, 2009 - It is November and my live oak trees are full of moths. What are they and are they harmful to my trees?
view the full question and answer

Removal of Ashe juniper trees
April 19, 2015 - I have 15 acres with scattered huge oak and elm trees with tens of thousands of Ashe Juniper (cedar) trees 2 to 10 in diameter growing within the drip zone of the hardwoods. How do I take out the c...
view the full question and answer

Landscape color for Rialto, CA
May 11, 2009 - My sister-in-law lives in Rialto CA near the base of the San Bernardino Mt ranges and it gets very windy out there. She and I were trying to figure out the best native plants for her area. Her home fa...
view the full question and answer

Failure to bud out of Shumard oaks in Floresville TX
April 16, 2010 - Question: I have a Shumard red oak (9-10ft tall) that I planted last October as its leaves were turning a brilliant red color. However, it's the only tree that did not bud this spring. I scraped t...
view the full question and answer

Leaves on new water oak turning brown from Matagorda TX
May 30, 2013 - We had water oaks planted in January when they had no leaves. Leaves came on but are now turning brown.
view the full question and answer

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