Protecting a passion flower

This summer I put a Constance Elliott passion flower into a north easterly facing border. The label says to protect during the winter, but please could someone advise whether I have to cover the whole plant, which has covered a goodly part of a hideous neighbour's fence, or just the root section at ground level?

 

Depends a lot on where you are and how cold the winter gets.

It reputed to be as hardy as cerulea, so minimal protection is required unless it gets very cold.
Must admit a north east aspect would not be my choice for a passion flower.

Just keep some fleece handy and perhaps peg a couple of thicknesses to the fence some how, should it get really cold.
Just protect the lower growth, the upper thin growth may well die back anyway.

 

My passion flower (which was already here when we moved to this house) is as tough as old boots. I cut it back every winter and put a bit of mulch around the roots and it's fine.

 

I would just protect the root area with a good thick mulch.
If the top growth is killed off it will come back from below the ground.