Iris ventricosa bloom - finally!

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I'm attaching a photo of a bloom on Iris ventricosa. I planted seeds
more than 9 years ago and have been trying to figure out how to get it
to bloom. Putting the container in a refrigerator for 3 months did the
trick! I also have a second clone from another collection in bud. These
iris grow in arid regions of central Asia. They protect themselves from
the elements by locating their rhizomes 6 inches underground and have
extensive root systems below that. For that reason, they need rather
large planters; I can only fit one planter this large in a refrigerator.
I have a total of four clones, but don't have room in my garage for two
more refrigerators...

Ken Walker
Concord, CA USA