This plant is not for neat gardens: Its growing habit is a bit messy at times as the stems go out in all directions, not standing firmly. It is possible to stake them, however.
But the flowers are truly gorgeous and the bees are very fond of them! :)

I have some in pots and one in the full ground. It proved to be hardy in my zone, withstood hard frost down to -12C for an extended period, and when it came back in spring with full vigor, it had doubled in size!
The ones I left in their pots outside didn't make it, though, probably because the wet and the frost have done them in.
They are very easy to propagate through cuttings.
Some of them in pots were in full shade and kept blooming very well, when planted in good soil with lots of organic material, they are drought resistant too.
It can have morning or evening sun, but avoid exposing it to hot midday sun.

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