Hi David,
The information above is really interesting...
The point is that the specimen in the image i initially posted is from my roof terrace in Dublin, I grow them in a well drained pot in full sun. I have never tried to grow them in Greece though..
I really like the C mackenii, I have a pot growing indoors here in Dublin but I would love to grow some of them outdoors in Greece. Are they evergreen or behave as bulbs? Moreover do you grow them in sun or shade?
From your picture i can see that you are also growing a Mahonia plant. Is it doing well in Rome?
Regards,
Periklis