En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Esperanza with rust spots in Corpus Christi, TX

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

Monday - November 30, 2009

From: Corpus Christi, TX
Region: Southwest
Topic: Compost and Mulch, Diseases and Disorders
Title: Esperanza with rust spots in Corpus Christi, TX
Answered by: Barbara Medford

QUESTION:

I have a young esperanza plant and the leaves have what looks like rust spots all over them. What is the cause of this and what can I do for it? My other larger and older esperanza does not have this.

ANSWER:

Without being able to actually see your plant, about all we can do is give you some questions to ask yourself about the location, soil and age of your Tecoma stans (yellow trumpetbush). 

We always begin by looking for pests and diseases that might commonly cause a problem and found, as so often happens, that just about every resource we looked at said this plant was resistant to pests and diseases, had none or was seldom bothered. A nice way of saying they didn't know, either. This University of Florida IFAS Extension website gives more complete information on the culture of the plant. There is always the possibility of whiteflies, aphids or scale defacing the leaves, but none of them are major concerns. And check the sun exposure: this plant requires full sun (6 hours or more of sun daily) or part shade (2 to 6 hours daily). 

We know we sound like a broken record, but the weather the last two years has been very unforgiving, heat and drought taking its toll on even hardy desert plants, which Esperanza is. You say your older plant is not showing these signs, which makes us wonder when you planted the newer one. If it was planted during the heat and drought we were still having up until mid-October, it could very well be suffering from transplant shock. In fact, research shows that plants can suffer transplant shock for up to 5 years after the original planting. Even a desert plant will need supplemental watering when there has not been sufficient rainfall, and the Esperanza particularly needs good drainage; that is to say, no water standing on the roots after it finally gets some rain, or even from a sprinkler system. 

Your plant is about to go into dormancy anyway. In Corpus Christi, it probably won't get cold enough to cause the plant to die back to the ground, but a good trimming back in early Spring will not only initiate more vigorous growth and blooming, but is also the treatment we usually recommend for transplant shock. Be sure and check the drainage; working some compost into the dirt around the roots and mulching the roots to add more heat and cold protection will also help.


Tecoma stans

Tecoma stans

Tecoma stans

 

 

 

More Compost and Mulch Questions

Native plants for poorly drained clay soil
March 24, 2008 - I am trying to establish a native plant garden in my back yard, I have two places where water stands for a few hours after a heavy rain, and the soil is black clay. Can you recommend any perennials 3...
view the full question and answer

Instructions for composting in southeast Texas
February 18, 2008 - Do you ever offer composting classes? I live in Houston and would like to start composting in my backyard... are there any particular books you would recommend for composting in SE TX? Thank you!
view the full question and answer

Browning leaves on recently planted chinkapin oak in Rockwall TX
June 09, 2010 - I just planted a chinkapin oak that is about 1 1\2 inches thick last week and now some of the leaves are turning brown. Does that mean its dying? Do you have any tips that I could use to protect it?
view the full question and answer

My newly planted Mountain Laurel isn\'t doing well.
March 13, 2009 - My mountain laurel was planted from a container in Dec. It is in part sun, clay soil, and its leaves are turning yellow. should I move it or will that kill it?
view the full question and answer

Soil for native Chilopsis linearis and Salvia greggii
February 08, 2010 - I want to plant a desert willow and a salvia greggii in my small lot. The developer used sandy loam to fill in the small garden in the front. I am 73 and a bit impaired. Do I really need to remove ...
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