Yucca plants with advancing age can grow into trees and some specimens have been dated to grow to more than one thousand years old in the arid deserts of the Western United States and Mexico. The yucca plant is a xericape evergreen plant that grows as a native tree in the tough environment of the desert.
Yucca plants when grown outside as specimens in the landscape, require no attention or applications of fertilizers or water. The thick leaves are prickly and resistant to drought and cold, most yuccas are cold hardy to zone 5 and 6. In the US yucca trees grow from Texas up to Virginia, and many gardeners now are experimentally planting them successfully further North in States as cold as Massachusetts, New York and New Jersey, where they have survived during the past few years.