Our back garden fence is overlooked by a row of 3 terraced houses. A gardener suggested we screen ourselves by planting Amelanchier lamarckii which I think is a lovely idea.
Question is we have cats who are unable to get out due to cat protection rollers I don't want them to suddenly be able to scale trees and get out or other cats get in.
How far away from the fence should we plant them and what do we then do with the space left between the trees and fence?