A young Kalmiopsis plant:
It was grown from a small plant purchased from Leach Botanic Garden in Portland, Oregon, two years ago. Growing in full sun on a raised bed of sandy loam soil. Occasional summer watering. Doesn't seem difficult.
That's an interesting species. I've been looking for someone selling plants here but they aren't easy to find :-\
Rogaland, Norway - with cool, often rainy summers (29C max) and mild, often rainy winters (180 cm/year)!