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 - May 23, 2007

From: Austin, TX
Region: Southwest
Topic: Trees
Title: Caterpillars on catalpa trees and hardiness of catalpas
Answered by: Damon Waitt

QUESTION:

A volunteer catalpa tree has recently popped up near the edge of our swimming pool. The foliage is lovely, so I'm considering allowing it to stay. This one has already proven to be a fast grower . . . but how do they do long term. Do they really get covered in worms all summer?

ANSWER:

There are two species of Catalpa in North America, Catalpa speciosa (northern catalpa) and Catalpa bignonioides (southern catalpa). Northern catalpa is a 75-100 ft., deciduous tree with a narrow, oval crown. Southern catalpa reaches 25-40 ft. in height with an equal or greater spread. Both species are fast growing and relatively short-lived. Either species may become weedy or invasive in some regions or habitats. Larva of the catalpa sphinx caterpillar (Ceratomia catalpae) eat the leaves and complete defoliation may occur in some years.

The biggest management problem with catalpa used as an ornamental is litter. They will drop a heavy load of flowers in the spring, then leaves in the fall and finally a lot of large seedpods in the winter. In other words, you will be spending a lot of time cleaning your pool.

For all these reasons, many people (Mr. Smarty Plants included) consider this nearly indestructible tree to be a bit of a nuisance despite its large showy flowers and tropical foliage.

Read this USDA Plant Fact Sheet to learn more about Catalpa.


Catalpa bignonioides

Catalpa speciosa

 

 

 

 

More Trees Questions

What fertlilizer for live oaks under drought conditions?
July 01, 2011 - In your June 7 answer about helping live oaks survive the drought, you state that additional fertilization may help as well. What kind of fertilizer to you recommend and how should it be applied? Th...
view the full question and answer

Plants associated with Acer rubrum (Red maple)
August 21, 2014 - What plants are commonly associated with Acer rubrum in its natural habitat?
view the full question and answer

Laurel oak tree not leafing out in Pasadena TX
April 13, 2010 - Hurricane Ike blew down our red bud in the backyard. Had a large 25' laurel oak planted early March 2010. When it was put in the ground, the leaves were on it, but they were all brown and dried. T...
view the full question and answer

Baby mountain laurels are ready to move, in Lockhart Texas
October 19, 2011 - I want to harvest the baby mountain laurel plants which are growing under a large bush. What height would be best for the young plants survival? Please recommend a soil mixture for the pots.
view the full question and answer

Tree for area around patio in East Texas
December 31, 2008 - What is the best type of tree to plant around my patio which faces the southeast
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center