Known as the Mediterranean fan palm, Chamaerops humilis is a clump-forming palm that grows in groups of several trunks in the wild. The key to success is soil that quickly drains, especially in the winter, so that the palm is kept on the dry side. A cactus-type growth mix on raised beds is suitable. This fan palm is a sluggish grower that seldom outgrows its area, with a height and width of 10 to 15 feet. Hardy in Zones 7b-11 but may be able to live in colder zones with sufficient winter drainage.