I forgot to say it takes some shade too like in an open wood.
Rogaland, Norway - with cool, often rainy summers (29C max) and mild, often rainy winters (180 cm/year)!
Today I picked up a Polygonatum with the advertised name of "'Gao Dan Bai".
Here are a couple of pictures of it that I took just before planting.
(Doing a search I see no mention of it except from the one nursery from which I bought it! Might it go by a different name?)