"Bob Hobden" wrote in message
...
This tropical plant is sometimes said to be an annual in the UK yet others
say it is a herbaceous perennial. So which is it, and has anyone grown it
and overwintered it successfully outside or does it have to be taken into
a frost free greenhouse.

Had a couple for several years at base of a SW-facing wall. Also several in
pots have survived in a coldframe - even last winter. OK, I'm in the Sussex
weald, but it still got very cold here last winter for an extended time.

Mind you, haven't seen a flower now for a few years...

--

Jeff