Alexander palm (King palm) is an attractive palm specimen. It is a medium sized, solitary palm tree with a gray trunk and bright green crownshaft. The fronds are pinnate and siver underside. It is a very nice and fast growing palm tree. It is highly priced for tropical and subtropical gardens. King palm species are from Australia. King palm is a very handsome specimen when planted in groupings of two or three. They grow well in full sun and require well drained soils and moderate moisture.