Now would be the best time i think. We have had frost here in the midlands and my dhalia's have started to turn black. I was going to lift them today but did not have the time. Will definately be lifting them tomorrow.

I have lost them in the past after packing them with compost but last year i packed all my dhalia tubersand begonia corms in paper from my paper shredder and didn't lose a single one, so am doing the same this year. I packed them with the shredded paper in cardboard boxes and left them in my cold conservatory.