|This is a hardy, upright, highly-branched perennial, to 3' tall and 24" wide. Leaves are lanceolate to oblong, wrinkled, medium green, to 4" long. Widely grown for its dense, dark violet-blue, spiked summer flowers, to 18" tall, with bracts of similar color. Outstanding for mass plantings, borders, or containers. Thrives in full sun. Heat and drought tolerant. Native to Europe and Central Asia.