Contact Us Host an Event 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
Not Yet Rated

Saturday - January 05, 2013

From: Austin, TX
Region: Southwest
Topic: Non-Natives, User Comments, Trees
Title: Non-native avocado trees in Rio Grande Valley from Austin
Answered by: Barbara Medford

QUESTION:

I just read the article in the Austin American Statesman about growing avocados outdoors. Don't know if they grow here, but they certainly don't just grow in south Florida. I used to live in Weslaco, in the Rio Grande Valley and there are avocado trees as high as houses all over town.

ANSWER:

Here is the previous Mr. Smarty Plants question to which you are referring. It was published first in the Ask Mr. Smarty Plants section of our website and then reprinted in the Austin American Statesman, which we very much appreciate.

You are correct, southern Florida is not the only place in North America where an avocado will grow. If it were in our Native Plant Database, which it is not because it is not native, we could go to our webpage on the plant and discover which states it would grow in and, again, follow the link to the USDA Plant Profile Map to see if it grew in Travis County.

The original question was "will it grow outside in Travis County?" From GardenGuides.com., here is an article on Hardy Avocado Trees in Austin. As you said, they point out:

"Traditional cultivation of avocado trees (Persea americana) takes place in the lower Rio Grande Valley in the southern tip of Texas around Corpus Christi and Brownsville. Austin is much farther north, and typically gardeners there deal with thin alkaline soil--much more challenging for successful cultivation of the subtropical avocado. Avocado can be grown in containers but inevitably becomes a tree taller than 30 feet. Austin is in U.S. Department of Agriculture Hardiness Zone 8b, although a warm winter may temporarily make it zone 9--cautiously good for avocado culture."

To take this just a step further, Austin, TX is in USDA Hardiness Zone 8b, the southern tip of Florida is in Zone 10b, and Weslaco, in Hidalgo, right down in the southern tip of Texas, is in 9b to 10a. If you notice in the quotation above, the thin alkaline soil of Travis County is also difficult for the avocado. We don't pretend to be right about everything (a tough thing for Mr. Smarty Plants to admit), but we just answer the questions, and our answer was basically, we don't know. We told that customer that if the only choices were keep it inside where it had outgrown its space or move it to Travis County, then there was very little to lose in transplanting it outside in Austin, but we did not guarantee that it would survive our soils and winter temperatures.

 

 

More User Comments Questions

Why do we exclude Mexican plant species?
November 17, 2008 - Thanks for all your great help and your wonderful website. I have been wondering why you exclude Mexico from "North American" native plants? I live in Austin and it seems like the flora and fauna ...
view the full question and answer

You are welcome
May 25, 2013 - Dear Mills, You are right. My elm has elm finger galls. Thank you
view the full question and answer

Plant database correct!
June 27, 2008 - Wrong taxonomy for bald cypress tree family in your plant database?
view the full question and answer

Would like a "try instead of" list for non-native plants in Austin, TX.
June 19, 2012 - It would be so helpful if, when asked about a non-native plant, you would do a "try instead of" list. I have about 45 plants to reseach from my landscaping firm, and it's wearing me out to try to...
view the full question and answer

Wrong photo in Native Plant Database
August 18, 2008 - The picture to the left of the information for Rudbeckia laciniata L. shows a plant with a dark center. This is not the Cutleaf Conflower with which I am familiar. What is it? Thank you.
view the full question and answer

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