I have a tiny garden 20 x 15. I want to plant a genie Magnolia in the lawn and under plant with naturalized bulbs that flower spring and Autumn with a couple of box balls in containers outside the conservatory. I am not sure that the genie Magnolia will look like a specimen tree or just a shrub misplaced from a border. I need an experienced Gardeners advice. What do you think? The garden has to be low maintenance because of health problems.