Perennial Herb or Tree: Evergreen. Tolerates drought, deer, humidity, wind and fire. Border, container and cut flower plant. Has sword-like blue-green leaves with ivory margins. Attracts hummingbirds. Bloom time: summer. Bloom color: fragrant, ivory white bell-shaped blooms. Height: 3-4 feet. Width: 3-4 feet. Flower spikes to 6 feet. Exposure: sun. Water: moderate. USDA Z4-9.