Here's one in the foreground with newly planted mimulus and California poppy (coastal variety, which I recommend whole heartedly over the inland variety) in the background.
Stylomecon in pots seemed to fare better, but I have only small number statistics. I think it due to the tailored drainage and water that I could give them in pots.
They seem to need quite well drained soil, so I'd guess that most garden beds are too moist. The flowers are prolific and bright, however they attach to the ground with a fragile tap root that can easily break.
I liked this plant and collected seeds for next year. Hopefully I can get it together and turn my California bland garden into a California grand garden.
- Posted at great expense from my iPhone