The message
from "Franz Heymann" contains these words:

There are a number of different Hellebores. Not all are equally hardy.
We have three H niger (Christmas rose) in a small garden in North Yorkshire
which do moderately well, and we never do anything specifically aimed at
protecting them, so I suspect your will be quite OK. I have to add that
they flower quite a bit later than Christmas.

Could they be Orthodox Christmas roses?

--
Rusty
Open the creaking gate to make a horrid.squeak, then lower the foobar.
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