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

Replanting yaupon in Blanco TX
January 16, 2013 - How do I replant Yaupon in its native area Blanco TX?
view the full question and answer

Non-toxic plants for dog yard from Freeport PA
June 24, 2012 - I'm looking for wildlife-friendly native plants that aren't toxic to dogs. I have a place for some small shrubs and/or flowers. And a climbing vine that I could train on a trellis would work espec...
view the full question and answer

Plants for a property near a conservation area in MD
July 18, 2011 - Can you tell me what native plants and the type of landscaping that would be good to plant in front of a forest conservation area that is on a steep hill behind our future house? It is located in Manc...
view the full question and answer

Container plants for part shade in Bee Cave TX
June 18, 2013 - Dear Mr Smarty Pants, I am looking for plants that will thrive on my covered porch in 3 tall planters. These are meant to help me block an unattractive view out my living room window, so they must...
view the full question and answer

Decorative small evergreen tree for Las Vegas NV
January 06, 2013 - I need a small decorative tree to be planted among a pine tree background; would prefer evergreen.
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