CULT: can iris colors change?


>I just joined this group.  This question has probably come up many
>times, but please indulge me.  Many people believe that irises change
>color from time to time.  I contend that they are genetically
>programmed to be a certain color and maintain that color without any
>changes.  I don't want to be right necessarily; I just want to know
>what the facts are.
>Thanks
>J Storrs

Welcome to the list.
This topic has been much discussed. You are correct, but there are 
conditions under which irises can .......
1. change colour ......
Roundup and other weedicides can cause temporary colour changes.
Blooms usually vary a little in colour as they age.
Some soil deficiencies or differences may result in minor variations of 
colour.

2.Appear to change colour .........
You planted 2 different cultivars, and they are blooming in alternate years.
You started with lots of colours, and now have only one because the 
strongest grower has taken over the bed.
The picture on the walmart iris packet was incorrect - you were expecting it 
to be accurate.
Your irises produced seed pods and now you have seedlings of a different 
colour, blooming amongst them.
etc.etc.

If you go to:
www.Mallorn.com/lists/iris-talk/
and do a search, you will find much interesting reading matter on this 
topic. You will also find lots of other interesting topics to read up on.
Always ask questions. There are plenty of people here to discuss irises 
with.
Cheers, Jan Clark, Australia, zone 8ish

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