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 Sago palm roots damaging house foundation from Keystone Heights FL
July 03, 2013 - Will sago palms roots hurt a house's foundation if too close?
view the full question and answer

Non-native Star Jasmine poisonous to dogs from Dallas
May 20, 2013 - Is star jasmine poisonous to dogs?
view the full question and answer

Non-native Boulevard Cypress Pom Pom trees in Princeton NJ
October 29, 2011 - I just had some landscaping done near my front door and front yard. I have two Boulevard Cypress B&B (4-5') Pom Pom. The pom poms are turning brown. What should I have been doing? I am watering them ...
view the full question and answer

Dwarf evergreen heath plant from Norcross GA
February 01, 2010 - I was reading a book that mentioned a "dwarf evergreen heath plant and wondered if such a plant exist. It is suppose to have leathery leave blooms with white flowers that produce red berries used fo...
view the full question and answer

Plant ID from Woodcreek TX
January 27, 2012 - I would like to attach a photo of a weed in my lawn and have you identify it. How do I send a photo? I have been told it may be ground ivy. Please tell me how to kill it without damaging the lawn.
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