Had several new ones last year which I brought in for the winter (until I
have bulked them up and can risk them out) Thing is they have not died back
as I expected, should I cut them down anyway or leave the new unflowered
shoots and only remove the old?

--
Charlie, gardening in Cornwall.
http://www.roselandhouse.co.uk
Holders of National Plant Collection of Clematis viticella (cvs)