The flowers (all colors) are beautiful. Mine are in a flower bed where they get a half day's sun and they bloom heavily. They like a lot of water, but when they are in the ground instead of a pot, they don't need nearly as much. When they start to get dry, the get a little wilted, then perk up shortly after being watered. The are very brittle, and can be broken by a water hose or stepping around them when it seems you barely touched them. For me, they do better if rooted in water; when put directly in the ground they lose all their leaves and look like the are dead. They will eventually come up, though.
I was told they did well in shade, and planned to put some in a small fenced-in garden that's all shade. Do they bloom at all in shade?