Herbaceous Perennial: Tolerates drought, seasides, deer, rabbit, and hot, dry sites. Long-lived. Good in borders, containers, rock gardens and as a cut flower. Spiny foliage holds thistle-like flowers that can be used fresh or dried. Attracts butterflies and pollinators. Bloom time: summer. Bloom color: steel blue. Dwarf variety. Height: 8-12 inches. Width: 12 inches. Exposure: sun. Water: moderate/dry. USDA Z4.