In article ,
Sacha wrote:

We grow it but only in a glasshouse. Nick's account makes me feel we should
try it in a sheltered place outside.

Here is what I think I have discovered!

It isn't protection from cold it needs but summer warmth, so a sun
trap is the best location. That is where I saw it, but can't now
remember which botanic garden. It doesn't start growing until the
soil gets really quite warm - i.e. VERY late.

It didn't do at all well until I started covering it in winter with
a 2' square pyramid made of wood, double-glazed with polythene.
An ordinary cloche would probably do as well :-) The point of that
is more to protect it from the wet than the cold as such, though
reducing the latter doubtless helps.

And, of course, I put a few buckets of gravel 1-2' down when I
planted it, to ensure good drainage.


Regards,
Nick Maclaren.