Posted: 17/08/2016 at 22:30
Depending how deep the border is ie. going down the way (rather than wide), you may get away with planting some Juniper Skyrocket - slim growing trees that will give you a bit of interrupted privacy. They will not give a full screening effect but will break up the space, but they will probably have to be taken out after 10 years or so when they grow too big. There is not an awful lot of plants that will give you the height you want with the size of the border.