Height: 2′-4′ Spread: 2′-3′. Soft, fragrant, silvery-green foliage and upright branches with light blue flowers appearing in July and August. In exposed locations or harsh winters, this plant will die to snow line and should be pruned to about 8″ each spring. Flowers are a favorite with bees, so avoid planting along entryways. Drought tolerant. Full sun. Zone 5.