It is amazing how some roses can survive the worst of care. In my town (Sebastopol), many empty lots and roadside drainage ditches are full of huge
Rambling Rose (Rosa 'Dorothy Perkins') and
Rose (Rosa 'Madame Alfred Carriere') bushes. I imagine the ones in empty lots are left over from a time when someone planted them there and cared for them, and the ones in drainage ditches must have originated as wayward pruning debris.