King Palms King Palms (Archontophoenix) are one of the most elegant palms with smooth, ringed green trunk and dark green foliage. Native to Australia, they are fast growing and cold hardy to 27 degrees. Height: 20-40 feet; Spread: 10-15 feet; Foliage: Arching 8-15 foot leaves; Exposure: Sun to partial shade; Watering: Regular watering with good drainage; but do not over water or allow to dry out for extended periods; Maintenance: Minimal.