2nd Year Maturity. Non-GMO, Heirloom Blue Steel Russian Sage Perovskia Herb Garden Seed from True Leaf Market. Perovskia atriplicifolia. Blue Steel Russian Sage is known for its ornamental benefits as one of the most attractive flowering herbs! With bright indigo flowers, drought-tolerant sage develops as a versatile evergreen subshrub during its second year. This variety has inedible leaves, but striking and silver-green foliage that can be dried into fragrant potpourrI'making this decorative sage ideal to have in your garden as a hardy companion or perennial border. 100 seeds.