Perovskia (Russian Sage)
Admired for its silvery gray, fragrant foliage as much as its lavender-purple flowers, Russian sage (Perovskia) makes a bold statement in the garden. The abundant, spiky clusters of flowers bloom from late spring until autumn, almost completely obscuring the leaves. Use Russian sage as a ground cover for open areas or as a specimen plant. Choose a location with very well-drained soil of average fertility in full sun. Growing Russian sage in partly shaded locations may cause the plants to sprawl. Set out new plants in early spring, spacing them 2 to 3 feet apart. Water the plants occasionally during dry spells until they are established and growing. If you would like to apply mulch around the plants, gravel is a better choice than organic mulch because it allows better moisture evaporation.