Perhaps few people make soap from Yucca elata these days, but soaptree yucca's quirky appearance remains universally charming. Carefree and drought tolerant, the soaptree yucca thrives in Sunset Climate Zones 7 to 24. The small trees or large shrubs grow up to 10 feet tall and as wide, making them ideal plants for your front entrance or to frame a patio view. Although generally drought tolerant, the high desert natives need a bit more water in the hottest months than some of their relatives in lower, dryer regions.