En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Drooping leaves on iris in Phenix City, AL

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
Not Yet Rated

Saturday - May 02, 2009

From: Phenix City, AL
Region: Southeast
Topic: Non-Natives, Herbs/Forbs
Title: Drooping leaves on iris in Phenix City, AL
Answered by: Barbara Medford

QUESTION:

I had a bed FULL of iris rhizomes so I thinned them out and made two beds. They flowered perfectly but some of the flower stalks and some of the leaves began drooping over. The flowering is over. The plants are all green, but some of the leaves are "perky" but some are still "droopy". What can I do about this? Can I cut the droopy leaves?

ANSWER:

If we may use some material  from previous questions, it will save some time:

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, seven were shown to be native to Alabama. These are: Iris brevicaulis (zigzag iris), Iris cristata (dwarf crested iris), Iris fulva (copper iris), Iris hexagona (Dixie iris), Iris verna (dwarf violet iris), Iris virginica (Virginia iris) and Iris virginica var. shrevei (Shreve's iris).

But, perhaps you are growing 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 The same map shows the Iris germanica NOT growing in Alabama, but we think that information is a little out of date. 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 plants native not only to North America but to the area in which they are being grown, 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.

We found a National Gardening Association website All About Iris that can probably give you better information than we can.We are assuming you have Iris germanica, or bearded iris. There has been so much hybridization of most of the irises that nativity would be almost impossible to determine. It is a very popular old garden flower and you should enjoy it. They are pretty tough and forgiving as we know from personal experience. One thing we would emphasize is no mulch. That rhizome needs some exposure to air, and will rot if it is completely covered. Organic compost in the ground, as it decomposes, will help keep the rhizome warm, but you don't want it to rot. We always made it a point to cut off a blooming stalk as soon as it had finished all the buds on the stalk, right down to the ground. Any leaves that are actually browned can come off, too but we don't think a little drooping is anything to be concerned about. 


Iris brevicaulis

Iris cristata

Iris fulva

Iris hexagona

Iris verna

Iris virginica

 

 

 

 

More Non-Natives Questions

Cutting back of non-native Salvia Elegans in Portland OR
December 31, 2011 - I did not trim back my pineapple sage in the fall. It is now winter and the plants are bare sticks. Should I cut them back or leave them alone?
view the full question and answer

Non-native Merremia tuberosa
August 07, 2006 - Respected Sir, I have been trying to find the scientific name and a sapling of a plant which had "flowers that look like rose flowers but are brown in color and have a paper like...
view the full question and answer

Male or female Jatropha curcas from Brownsville TX
August 16, 2012 - How do know the sex of a young Jatropha C. plant? how many weeks before you can tell a boy/girl plant ?
view the full question and answer

Pruning non-native oleanders
September 28, 2011 - I have an oleander that has become to "leggy". I read the pruning instructions, but where I want to prune, there are not any leaf nodes. Can I trim below at the base, or will I hurt the plant? I ...
view the full question and answer

Firecracker plants not growing in Ft. Worth
June 09, 2010 - I live in Fort Worth, TX and last fall planted several firecracker plants. It's now June and they're not growing. How can I tell if they are still alive?
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