Explore Plants

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
    
 

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
Not Yet Rated

Tuesday - February 09, 2010

From: Austin, TX
Region: Southwest
Topic: Non-Natives, Herbs/Forbs
Title: Dietes bicolor(Bicolor Iris) winter-hardiness in Austin
Answered by: Jackie OKeefe

QUESTION:

I have many bi-color irises (dietes bicolor), the freeze in Austin turned them brown. Can I trim them back without harming the plants? If trimming is acceptable, can you give me tips?

ANSWER:

Dietes bicolor(Bicolor Iris) , an African native which is rated to zone 8B (15 to 20F), isn't wintering so well this year in Austin and yours are among many that have frozen to the ground.  This answer was recently given to a similar query. In my central-Austin neighborhood they are sprouting new greenery already, but I would either wait to cut them back, or mulch after doing so to protect the tender new growth until we are past danger of another hard freeze.

 

More Non-Natives Questions

Pruning Cuphea Plants
February 04, 2013 - The David Verity cuphea (cigar plants) that I planted last spring are now 3-4 feet high. I would like to move them, but before I do they seem to need pruning. All the branches are brown and dry lookin...
view the full question and answer

Problems with non-native African violets in Des Moines
January 08, 2010 - My violets have stopped blooming after years and have developed a growth in the middle of the plant. Can I save these plants and how can I revive them. Thank you, I am desperate to salvage them as the...
view the full question and answer

Taking stock in where and what you grow in Denver Colorado
December 22, 2011 - I have two year old stock plants growing in a container in my home and they are finally starting to bloom. However, the buds open but don't produce any petals. Also they are experiencing yellow leave...
view the full question and answer

Death of non-native eleaegnus from Austin
March 30, 2013 - We have a long hedge of elaeagnus, about 5 ft tall. Four of them died in the middle of the hedge. Where can we find such big plants? Is it advisable to unroot and transplant from another area?
view the full question and answer

Replacing non-native boxwood in Austin
October 03, 2011 - I have a large maze garden, possibly boxwood, originally planted in the 1950's, in Austin, Texas. About 1/3 of it has died out, probably due to drought, heat and age. Should I attempt to replant ju...
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.