TENDER PERENNIAL. The long, broad leaves of this unique rosemary extend from thick, rigidly upright stems blushed with a reddish brown. Its leaves are fat and long, double the size of other varieties. Light blue flowers cluster along tall, unpruned stems. While the aroma of the leaves is not overpowering, it is gentle, sweet, and a bit gingery. This plant, unique in its coarse vigor, is hardy to about 15°F.