" We have had some very low temperatures this year and have lost a few plants including a clematis Montana which was very healthy and over 30 years old"
That may well just come back, GP...
Our 'President' has had a few bad years, but always fights back, even though it looks like the proverbial Dodo around Feb!
I thought we'd lost all our outdoor fuchsias, but right down at the bottom of the stems, there are signs of life, so let's hope you'll see something soon!
(ps - would you like some of our rain? It's pouring down here)!