Jennifer Trehane's book says it grows outdoors in sheltered gardens in
the south of England. In China it gets cold but dry winters, so likes
good drainage and good air circulation. FWIW (which isn't much in the
UK) the Americans rate it's hardiness as zone 6 - 8, but they have a
continental climate.


--
Chris

E-mail: christopher[dot]hogg[at]virgin[dot]net