Its fun to have some contrast to all the warm autumnal shades. Russian sage does the trick with its airy blue flowers and silvery foliage. Another reason we love it: Its tough as nails and both the foliage and blooms have a great scent. Name: Perovskia atriplicifolia Growing Conditions: Full sun and well-drained soil Size: To 5 feet tall Zones: 5-9 Native to North America: No