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

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

Arizona Ash dropping seed pods and waste in Houston
April 08, 2010 - My Arizona Ash tree is dropping seed pods and other waste on my deck and walkway. It has never done this before in the 14 years we have had it. We did get it cut back last winter. Could this be the re...
view the full question and answer

Wilting stems on beautyberry in Georgetown, TX
August 16, 2009 - Last summer I discovered that a 4-year old beautyberry had one (of many) stems that died. Leaves on this single stem wilted and dried up. This year the same happened to two or three stems. The rest of...
view the full question and answer

Oak trees shedding leaves in Denton TX
May 27, 2012 - In Denton, TX we have two mature Quercus buckleyi. It is May 11th 2012 and one of these trees has been shedding green leaves for the last week. The only changes we have made are: planted English ivy...
view the full question and answer

Protection of American beautyberry in Pennsylvania
July 30, 2007 - I have had a beauty berry 2 years now. I trim it back in early spring and it returns beautifully. ...but no flowers this year and it's almost August. Last year, very few berries. Can you help? I...
view the full question and answer

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