Just bumping to see if anyone has a clue!
Zoozue

I don't know, but it is pretty, isn't it?

Looks like borage.

Thanks ginibee but after looking up borage it doesn't quite fit the bill. It could be a wild origin plant, not a cultivar so perhaps it is in that family. It has come back two years in a row now and the bees and butterflies love it, doesn't last all summer but drops seeds that come back in spring.

I will keep trying, perhaps someone will recognize it.
Zoozue

Could we see a picture of the leaves? Maybe that would help ID it.