Magnolia, Royal Star MagnoliaThe Royal Star Magnolia is a deciduous tree that typically grows to a height of 10 15 feet (3 4. 5 meters) with a similar spread. It has a compact, rounded form and dense branching. The star shaped flowers are the highlight of this magnolia variety. They are large, white, and fragrant, with multiple petals that give them a star like appearance. This magnolia variety thrives in full sun to partial shade. It prefers moist, well draining soil that is