We have to demolish a dangerous boundary wall, and are thinking of replacing it with a rose hedge. One side of the wall is block paved and leads to a garage - I can plant well within the border on the other side, but would still prefer a thornless rose if possible. The boundary runs north-south and only gets sun in the summer. Does anyone have any recommendations, warnings etc? Will they be adversely affected by the quantity of spalled brick and crumbled mortar in the border? There are already 4 rose bushes in the border, they've only been there for 3 years so would there be a problem with rose sickness?
And if roses are a no-no, what other hedging would work? The rest of the area is bordered by privet, and I really don't want to put any more of that in!