En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Yellow bands around edges of leaves in Whitney 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
Not Yet Rated

Monday - July 20, 2009

From: Whitney, TX
Region: Southwest
Topic: Non-Natives, Compost and Mulch, Diseases and Disorders, Watering, Shrubs
Title: Yellow bands around edges of leaves in Whitney TX
Answered by: Barbara Medford

QUESTION:

How can you tell whether esperanzas are getting too much water or not enough - ours have a small yellow band around the edges of the leaves - crape myrtles - same question

ANSWER:

Tecoma stans (yellow trumpetbush) (Esperanza) is native to North America and to Texas, but most of the areas where it is growing are in far south and southwest Texas. It thrives in rocky, alkaline soils and needs watering only about every one or two weeks. We are not sure what kind of soil you have in your area of the state, but if  you have a clay soil, and have not amended the soil for better drainage, that could be the problem. While Texas has been uncommonly dry this year, you have probably been watering your garden, and water may simply be standing on the roots of the bush. If your Yellow Bells has been planted recently, continuing to water is probably important, but drainage is even more important. Work some compost into the soil around the roots and avoid watering with an automatic sprinkler system. Overhead watering (except rain) can cause problems for some desert plants. It also does not need fertilizer, since it is native.

We frequently find that chlorosis can cause yellowing leaves. In the case of the Esperanza, the overwatering of the roots may be preventing the roots from accessing some of the vital trace elements in the soil, especially iron, and this can cause chlorosis. In the case of Lagerstroemia indica, Crape myrtle) there may be the same problem, but in this case we have no information on it in our Native Plant Database because it is non-native. At the Lady Bird Johnson Wildflower Center we are committed to the growth, care and propagation of plants native not only to North america, but to the spot in which they are being grown. 

We checked on the possibility of leaf spot diseases, and found none that fit the description you gave. This Floridata site can give you more information on Lagerstroemia indica but, again, good drainage is about the only recommendation.  Both plants would likely benefit from composting and mulching, and both should be in full sun, 6 or more hours of sun a day.


Tecoma stans

Tecoma stans

Tecoma stans

Tecoma stans

 

 

 

More Non-Natives Questions

Can lantana be grown in British Columbia from Vernon BC
October 20, 2012 - Can I grow lantana in Vernon B.C. Canada?
view the full question and answer

Problems with non-native peach trees from Lago Vista TX
April 06, 2011 - I have two peach trees that are setting fruit. Last year the small fruit had sap coming out of most of them. When they ripened there was a rotten spot in each of them. I had to throw most of them aw...
view the full question and answer

Non-native, invasive creeping fig in Webster TX
May 26, 2013 - We've recently moved into a new home in the southeast Houston area. The back of our property has a long concrete wall (gets quite a bit of sun), which we thought we could cover with a spreading vine....
view the full question and answer

Weeds invading non-native Asian Jasmine in Dallas
April 26, 2011 - Weeds have invaded my Asian Jasmine. What can I do to kill the weeds and not the Asian Jasmine?
view the full question and answer

Help with non-native plants in California
January 14, 2014 - I am growing some beads of pearl in my front yard in front of a pepper tree that has been around for over 150 years. My question is what can I do to get my beads of pearl to grow without cutting down ...
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