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
4 ratings

Sunday - January 31, 2010

From: Austin, TX
Region: Southwest
Topic: Non-Natives
Title: Non-native Dietes bicolor leaves brown after freeze in Austin
Answered by: Barbara Medford

QUESTION:

I live in Austin, and my butterfly iris (Dietes bicolor) that I've had for the last 6 years are all turning brown after the most recent freeze. Should I cut them back, with the thought being they would sprout new growth? Or are they dead, and should be dug up and replaced?

ANSWER:

Dietes bicolor, Butterfly or African iris, is a native of South Africa, and therefore out of the purview of the Lady Bird Johnson Wildflower Center, where we are dedicated to the use, care and protection of plants native not only to North America but to the area in which they are being grown.  Both it and members of the genus Iris are related distantly by being part of the family Iridaceae. We can tell you that the Dietes is hardy from Zones 8b through 11; they are evergreen through the winter unless the temperature goes below 25 deg. F., at which time the leaves will turn brown. Since this plant regenerates from a rhizome, it will no doubt come back in warmer weather. We would suggest simply trimming down those browned leaves and not fertilizing.
 

More Non-Natives Questions

Non-native Asclepias curassavica
March 09, 2005 - I have some plants given to me by a neighbor, here in Florida. She says they are called Butterfly Reel or by another name Asclepias Curassavica. I have been unable to locate any info. on this plant. ...
view the full question and answer

Plants not native to North America in Hawaii
February 18, 2009 - Do not know if you have any experience for Hawaii but here it goes. I live on Maui and have some coco palms, a line of 12, two of them right next to each other (15-20 ft). They are a decent shade of ...
view the full question and answer

Pruning of Grape Kool Aid Plant in California
August 03, 2008 - I have a Grape Kool Aid plant and was told it would grow to 6 or 7 feet tall, but it is well over that and I need to know if I can prune it and if so how?
view the full question and answer

Failure to bloom of tropical plumeria
July 04, 2008 - I have had my plumeria for the past five years. The first three years it bloomed but has not the past two. The plant is healthy and continues to grow but will not flower. It seems to be very health...
view the full question and answer

Problems with non-native navel orange
October 03, 2008 - Hello Green Guru, Question: Why hasn't Navel Orange Tree grown or sprouted new branches? It's 3 years old and is about 5 feet tall and has remained this size. It hasn't grown at all. It only ha...
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