I am trying to find seed for the above plant (not sure if it is annual or
perrennial). It is quite rare (not even listed in Mabberley) but it is also
quite lovely. It is grown at the Chelsea Physic Garden but they have no
more seed. I wonder if anyone might be able to let me know any good seed
nurseries that I might be able to try (I have tried the main ones, Thompson,
Chiltern etc but with no success)....

Many thanks

Philip