The Alexandra King Palm (Archontophoenix alexandrae) is a fast-growing, elegant, self-cleaning palm native to Australia, often used for tropical, slender, and stately landscaping. It thrives in USDA zones 10-11, growing 30-50 feet tall with a 10-15 foot spread, requiring full to partial sun, regular watering, and rich, well-drained soil. It is cold hardy to approximately 26°F-28°F, making it suitable for warmer temperate climates.