Martin Brown muttered:

Worth noting that they are fairly poisonous plants. The perfume from a
couple of flowers will fill a greenhouse and hover flies love them.

The scent is just heavenly. When I went around the corner of our house to
the terrace the first evening, wow! My mother used to live in Jamaica and
some friends of hers had a courtyard full of them... imagine. I'm going to
get a few more next year.