When I saw it in a nursery this spring in the flesh and blood, I grabbed it immediately, actually a few. But once in my possession and I realized that C. 'Diamond Head' (by the way, why didn't they call it Black Diamond, so much more descriptive) was very different. Instead of having a dull matte finish it is shiny sort of like an oil slick with that oily rainbow of color.
I have them growing in two situations, one at the edge of a pond (in the water) and one in a pot, both in full sun. The one at the edge of Whiskey Creek is doing best though the potted specimen is no slouch. It would also be great in a bog pot. An excellent addition to a garden noir!
Now I wait to see how it will do or what it will do this winter.
Over and out.