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
1 rating

Thursday - October 18, 2007

From: San Angelo, TX
Region: Southwest
Topic: Diseases and Disorders, Shrubs
Title: Nutrient imbalance in Tecoma stans
Answered by: Jimmy Mills

QUESTION:

I have two Tecoma stans on the north-east side of my yard. They have grown very tall (5') but have not bloomed all summer. Last summer they bloomed profusely. Any idea what the problem might be?

ANSWER:

Tecoma stans (yellow trumpetbush) aka Esperanza or Yellow Bells is a popular landscape plant that is native to Texas and Northern Mexico, and the cultivar "Gold Star", developed by a plant breeder in San Antonio, TX, has become a favorite in Texas due to its abundant flower production and its shorter height.

Since you had profuse blooms last summer, but none this summer, the question to ask yourself is what am I doing differently this summer? Flowering is a complex process that is influenced by several factors including amount of sunlight, amount of water, and nutrient balance, particularly the nitrogen to phosphorous (N/P) ratio. Unless you have transplanted the Tecoma or have had an unusual amount of rainfall, you can probably eliminate the first two. Austin has had a really wet summer, and the Tecoma here are blooming spectacularly.
That leaves nutrient levels. If you fertilized in the spring with a fertilizer that had higher nitrogen content relative to phosphorous, this may be your problem. I'm including links to Texas A&M and Penn State that do a great job of explaining the N/P ratio and its effect on flowering.

You might also check to make sure that there aren't any insects that are attacking the immature buds. 

 

From the Image Gallery


Please ignore this too
Please ignorePlease ignoreTecoma stans

More Shrubs Questions

Plants that are deer resistant for high desert climate in Utah
January 23, 2008 - We are building in a high desert climate in Dammeron Valley, Utah. We want plants that are both deer resistant and require little watering. Can you advise which plants (shrubs, flowers, cacti) that ...
view the full question and answer

Failure to bloom of lantanas in San Antonio
July 22, 2010 - Mr. Smarty Plants, We have lantanas in our front yard. This summer the leaves have turned white and they die to a brown color all the while the leaves are "crispy". At the beginning of the season...
view the full question and answer

Care of non-native Buddha Belly bamboos
November 08, 2014 - I have several budha belly bamboos. They froze down last winter. I have got them back to 5 ft. I need them around 8-10 for privacy. Any suggestions? Also how to I protect them this winter?
view the full question and answer

Is Sabal minor juglone tolerant?
October 13, 2014 - Is Sabal minor or any other small and shade tolerant palm juglone tolerant? Id like to plant one in an area near a pecan tree but I am not sure if they will play well together.
view the full question and answer

More information on Malvavaceae from French botanical garden
September 04, 2011 - hello thanks for the reply in your garden all of yours Malvaceae interested us but priority for this species could you help us ? regards Fabrice Absous Allowissadula holosericea Bastardia ...
view the full question and answer

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