| My own experience has been that Murrayas can be trimmed to almost any height and width that you desire - I'm not aware of any root issues. If you want a low hedge which wont cause problems, have you considered one of the Syzygium Australe cultivars such as 'Tiny Trev' ? The guys at GA have written an excellent article on the subject of hedges: |
Here is a link that might be useful: Hedges - exotic and native