Yucca whipplei. Syn: Hesperoyucca whipplei. Recommended Temperature Zone: Sunset: 2-24; USDA: 8-12. Columnar or multi branched rosette, up to 20 feet tall, 12 feet wide at altitudes of 0–2500 m. Hardy to 10°F Full sun to light shade, will take reflected sun in summer in hot location. Little to moderate water, good drainage. Origin: Southern California and Baja California, Mexico