The Yucca 'Sapphire Skies', 'Yucca rostrata 'Sapphire Skies', is a beautiful Adam's Needle with short, narrow, flexible needles in a shade of powder blue which will mature to an upright, unbranched tree at 5 feet tall. The pointy needles radiate out in every direction from the center of the plant; plant holds color all year long. Over time 'Sapphire Skies' will form an unbranched tree trunk to 4inches in diameter. 'Sapphire Skies' is the hardiest of all the trunk forming Yucca. Use as a bold architectural element in containers or low water borders. White flowers appear on a spike. Once this easy care yucca is established, it needs only occasional watering.