This is where containers come into their own. A good deep 12-18 inch pot should comfortably hold at least five different plants, preferably with contrasting textures and characteristics.
An easy way to ensure it thrives with little care and attention is to create stunning container displays. From cyclamen (winter heroes that can be brought to flower from autumn to spring) to sedums ...
While this is happening, dig a planting hole twice the diameter of the container and slightly deeper, so that the rootball of the tree sits at the same level as the surface of the soil.