In article ,
says...
Is anyone growing this 'up country'? I'm curious to know how well it
does in frosty winters. It comes through with us usually but we did
lose some of it last year.

Came through here, and flowered all through, been in flower now 2 years
without a break, looking great as I write.
We do grow it in very free draining compost bang up against a greenhouse
and through an evergreen senna so its well protected.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea