An extremely cool plant in every way and highly ornamental and extremely hardy, 'Sapphire Skies' differentiates itself from other Yucca rostrata cultivars with its more noticeable silvery blue foliage color. Commonly known as Big Bend Yucca or Beaked Yucca, it is a tree-like North American native species. Though it naturally inhabits western Texas and northern Mexico, where it can be found thriving on rocky slopes and ridges, it does well in other regions of the country in USDA Zones 5 to 11, which means it'll handle temperatures down to -20F, or the most heat you can throw at it to Zone 11. When young, it looks more like a rounded shrub, but as it grows it forms an upright tree with a beautiful pom-pom-like, perfectly symmetrical globe of hundreds of soft, narrow, 2 foot long light silver-blue leaves atop a tall trunk. As it grows taller the old leaves fall off, or can be removed, which exposes the fibrous soft gray covering on the trunk. Large clusters of white, bell-shaped flowers on sturdy stalks tower above the foliage in late spring to early summer, depending on location. Performing best in well-drained to even rocky and sandy soils, Sapphire Skies Yucca makes for a fine vertical accent tree or grouping in sunny to partially shaded rock gardens, landscape borders, and home foundation plantings. We suggest a minimum of 3 hours direct sunlight and good soil drainage. Get all the details below