Iris unguicularis

Jane McGary
Fri, 20 Nov 2009 15:00:36 PST
Kathleen, who lives on the coast while I live inland near the 
mountains,  wrote:
>My own Iris unguicularis doesn't flower until later in the winter. Is
>someone with an earlier-flowering clump interesting in trading or
>selling a start from an early flowering clump to me?

I don't think it's so much the clone that determines the flowering 
time of I. unguicularis as the climate. I have two clones here, and 
neither flowers before the end of December. I also have the closely 
related (perhaps a subspecies) Iris cretensis, which flowers later 
too. One of mine, I. unguicularis 'Walter Butt', is a popular clone 
and produces flowers intermittently from late December to mid-March. 
I suspect the flowering time is determined by when the plant is 
watered. Those reported to flower in the eastern United States would 
have received summer water, while mine and perhaps Kathleen's would not.

Jane McGary
Northwestern Oregon, USA

More information about the pbs mailing list