HI Iris
Nina answered the question
I agree with you that there are limits to everything I do not think
that a wither like the Canadian one is suitable for Serissa
but Japn is a long cluster of islands with a climate ranging form
Newfoundland to Florida , so you find all temp zones you like and
Beside of Japanese Variety of Serissas that I do not from which part
of japan are native theh others will come most probably from Taiwan
mainland China or Korea and climate there is not always sub tropical
either
4 fingers of snow as I said were on a picture but some people had it
frozen and survived .. and reported a vigorous growth in spring and a
deep greening of leaves plus a bonanza of flowers.....
I was willing to buy one again to make a personal test .. and the
chunk( the cutting gave me a possibility to test without spending 20 $)
I really must be reasonable I have a balcony and the room available
is shrinking you know we are all the same ... just one more the last
one I swear! :-)
Theo


Iris Cohen wrote:
The chunk is inside a pot with no roots just peat and sand will be outside
all winter Geneva Switzerland zone 7
outside for the moment makes 0° C (32 F)
I have seen pics of serissas under 4 fingers of snow and it seems they are
great! many french people leave them outside and in belgium too
Of course. That is what I keep telling people who keep them too warm and wonder
why they don't thrive. In this country they are naturalized in the state of
Georgia (Zone 7 to 8).
You can't go by latitude. UK is at the 49th Parallel, but it has a climate
similar to our Pacific Northwest, which is further south. Most of central
Europe is in Zones 5 & 6, even as far north as Finland. Upstate New York is
around the 43rd Parallel, but much colder. Here in Zone 5, our average minimum
winter temperature is -10 to -20 F, -23 to -29 C. Even in Zone 6, which is 10
degrees warmer, I doubt that Serissa would survive outdoors. 4 fingers of snow?
Try a meter or more, with the ground frozen solid.

Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)