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
1 rating

Wednesday - November 12, 2008

From: Austin, TX
Region: Southwest
Topic: Diseases and Disorders, Shrubs
Title: Pale leaves and brown tips on Tecoma stans in Austin
Answered by: Barbara Medford

QUESTION:

I have a Tecoma Stans planted in a large galvanized container in a sunny spot. It has grown very fast in the last few months and flowers regularly, but the leaves are pale and the tips are turning brown. Any ideas of what could cause this?

ANSWER:

Okay, quick now, do you have drainage holes in that galvanized container? If you don't, the roots of that Tecoma stans (yellow trumpetbush) may be in serious trouble. This plant is a desert plant, used to limestone-based soils, and growing on hillsides, slopes and canyons. If there is any water, the roots will greedily drink it up, but they don't tolerate standing in it. 

From an article "Focus on Plant Problems" from the University of Illinois Extension:

"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 information from the Virginia Cooperative Extension Iron Chlorosis Signals Problems indicates that often the trace mineral missing and causing chlorosis is iron. If you planted your Tecoma stans in potting soil, it should be balanced and not be causing the chlorosis problem. If, however, you dug up native soil for the plant, it could be too alkaline even for the alkaline-tolerating Yellow Bells. Iron chelates are organic compounds containing redily absorbed iron, and may provide a temporary solution to the problem. 

Yellow Bells is a good container plant, but it needs to be a big enough container to provide sufficient room for the roots, and it needs to have drainage. 


Tecoma stans

Tecoma stans

Tecoma stans

Tecoma stans

 

 

 

 

More Shrubs Questions

Native Streambank Plants for SE Pennsylvania
July 18, 2013 - I help manage a nature preserve in southeastern Pennsylvania. Along the stream the banks have been beaten down by a large number of visitors for their educational activities such as stream studies. Th...
view the full question and answer

Hill Country natives for a hedge
June 01, 2006 - Can you recommend a "hedge type" bush to use in lieu of a fence along the road in the San Antonio region? My whole back yard is planted with Hill Country natives and I would prefer to keep the the...
view the full question and answer

Powdery mildew hits Rock Rose in Round Rock Texas
May 05, 2011 - My beautiful Rock Roses have gotten spots of white fuzzy "fur" on their leaves in the past month. This is not something they have ever had before and I'm worried its some kind of disease. Is it so...
view the full question and answer

Problems with shrubs by pool in Bethesda, MD
February 24, 2012 - We are trying to grow Otto Luyken Laurels by a pool and doing okay, some brown spots on leaves, but not many. Also have Arbivatea beside the pool about 3 feet from the edge of the pool. They have a l...
view the full question and answer

Privacy screen for Sedona AZ
August 02, 2013 - I live In Sedona Az. A builder just built a house next to my house and the new house is ugly to look at. What plant or tree would grow fast and reach 18 foot in height fast. It can be about 5 to 6 foo...
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
© 2015 Lady Bird Johnson Wildflower Center