Yucca filamentosa NEEDLE PALM A trunkless, rosette forming species hardy to zone 5.  Foliage is thick and swordlike, providing a sharp textured foliar contrast and focal point within the garden.  Older plants bloom more frequently with panicles rising 5 feet above the plant adorned with numerous bell shaped flowers, similar to Digitalis.  Yucca’s have taproots which can hold food and water in reserve, so water sparingly and plant in full sun.