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

Saturday - October 06, 2007

From: Round Rock, TX
Region: Southwest
Topic: Herbs/Forbs
Title: Difficulties in growing iris in Central Texas
Answered by: Barbara Medford

QUESTION:

I live in Round Rock TX. I would like to plant Irises and have failed before. What type of irises grow best here? When should I plant them and should I add something to the soil to help them grow?

ANSWER:

Let's talk first about native or non-hybridized iris. There are 26 irises native to North America in our Native Plant Database. Of these, only 4 were shown to be found in Texas. Most of them seemed to favor the West Coast, or cool, wet areas. The four irises tough enough to grow in Texas are Iris brevicaulis (zigzag iris), Iris fulva (copper iris), Iris hexagona (Dixie iris), and Iris virginica (Virginia iris).

But, perhaps you were thinking of the Iris germanica, bearded iris. This USDA Plant Profile link refers to the I. germanica as "introduced"; that is, not native to North America. The USDA Plant Distribution Map at the same web location does not show Texas as one of the states where it is distributed. Of course, we know that many gardeners grow it here, but that perhaps gives us a clue to why it seems hard to do so. This site from Floridata will give you more information on the culture of I. germanica. It apparently began as a natural hybrid between I. pallida and I.variegata. Iris germanica is thought to be native to Southern Europe and the Meditteranean, and other species from Europe and Asia have been brought into the breeding, but it has become established all over the temperate world and can be found on road shoulders and old home sites throughout much of the United States and Europe. There are literally thousands of different irises, many of them with commercial cultivar names.

Now, we begin to see the value of using native plants, as promoted by the Lady Bird Johnson Wildflower Center. When you are dealing with a hybridized and/or non-native plant, you have no idea what characteristics it has bred into it, nor of the ideal way to grow it. With plants native to the area in which you are gardening, you don't have to make as many adjustments in water, fertilizer or even soil content, because you likely already have good conditions for the native plant to flourish.

 


Iris brevicaulis

Iris fulva

Iris hexagona

 

 

More Herbs/Forbs Questions

Red pods on Canna Lilies from Windsor VA
July 21, 2013 - What are the dark red pods on my canna lilies?
view the full question and answer

Something eating holes in Texas Betony from Austin
June 06, 2012 - What pest is eating holes in the leaves of my Texas Betonys? They look healthy but almost all leaves have various sizes of round holes in them. What is the best cure for this? Thanks
view the full question and answer

Cutting Garden Plants for TN
July 16, 2014 - I would like to know what would be in a year round cutting garden in Nashville, TN for a novel I am writing.
view the full question and answer

Groundcover for Sunny Slope in CT
May 11, 2013 - I need a plant to use as groundcover and for erosion control on a sunny slope in southwestern Connecticut. Any suggestions other than juniper?
view the full question and answer

Is the Obedient Plant a bog plant?
August 16, 2008 - I purchased 2 obedient plants at a farmer's market in Michigan. As I was unfamiliar with this plant, the merchant told me it did well in full sun. It was just what I needed. When I got home I look...
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