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Thanks for replies.Had no problem with the ivy that I but it grew so thick,,should have given it a trim every year,I suppose.
Having now removed it,there is a great possibility it will grow back..did a few years back when it was removed ..but thought I would like something with flowers.Course would have kill off the ivy roots first.
Have got Ceanothus in the garden which is also facing North plus on a windy corner..has grown huge.
On reading about Hydrangea Petiolaris ,seems that it would be OK on the wall,so will probably try it.
Thank You