I got the plant for $10 at Bunnings last year, planted it and waited. I had an unfortunate cull a month or two ago, where I mistakenly lopped a flower head off, but it came good. And this is a miracle of nature.
Exquisitely beautiful, and functional. The pollen available only to whatever bird is clever enough to sit on the end of the blue flower.
For some reason. The reason can be someone else's mystery.