Virtually any plant can be used to delineate a border or property line. If you want to create a solid hedge, whether formally sheared or informally left to a plant’s natural growth habit, there are select species that can fill this request.
Informal hedges have a naturally rounded character and generally reach the mature height of the plant. Some limited pruning can be used to maintain a somewhat shorter height.
Formal hedges have a specific shape such as squared off edges. They require frequent maintenance to retain the desired shape. Hedge height can vary from 2-3' up to 15'.