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

Monday - April 04, 2011

From: Austin, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Chlorotic leaves on yaupon in Austin
Answered by: Barbara Medford

QUESTION:

My yaupon holly looks chlorotic, it is 7 years old, I do not feed it, just a little seaweed occasionally. I am a totally organic gardener.

ANSWER:

We looked up "chlorosis" in Botany for Gardeners by Brian Capon (see Bibliography below) and learned that "the characteristic deficiency sympton of magnesium and iron is chlorosis (yellowing of the leaves) due to the curtailment of chlorophyll synthesis. Magnesium is an integral element in chlorophyll molecules; iron must be present during production of the pigment."

From the University of Illinois Extension, this article Focus on Plant Problems has  very good information on the reasons for cholorosis. You need to read the whole article, as it has suggestions for treatment, but we felt the first paragraph probably summarized what you need to be looking for:

"Chlorosis is a yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity, and nutrient deficiencies in the plant. Nutrient deficiencies may occur because there is an insufficient amount in the soil or because the nutrients are unavailable due to a high pH (alkaline soil). Or the nutrients may not be absorbed due to injured roots or poor root growth."

 

More Diseases and Disorders Questions

Problem with unknown tree in Austin, Texas
July 23, 2013 - Have recently moved to Austin, Texas and have a tree in my backyard that has been dropping leaves and one major branch appears to be dead. That branch has hard rust colored sap circles (about penny si...
view the full question and answer

Elimination of dirt dauber insects
August 18, 2006 - Hello - I live in the southeast part of Guadalupe Co. in the post oak savanna area. Do you have any suggestions on how to control dirt dauber dirt/mud nests. I know these critters are beneficial, bu...
view the full question and answer

Huisache tree is not thriving in Kerr County, TX.
May 18, 2011 - Our landscaper planted a Huisache tree in our back yard (Kerr County). It was planted about 3 years ago. It has grown considerably (about 15 feet tall)but it has never flowered and is always late in...
view the full question and answer

What to do about powdery mildew on Pavonia lasiopetala?
June 02, 2009 - My Pavonia lasiopetala seems to have gotten mildew this spring. I was hoping that warm weather would get rid of it. Instead it has spread to most of the plants which are located in widely separated b...
view the full question and answer

Swarming insects on non-native willow in Washington PA
September 25, 2011 - I have had a very large, beautiful pillow willow bush/tree growing next to our garage for about 8 years. Last year at the end of August, it began to attract white-faced hornets and yellow jackets by 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