'Royal Raspberry' has rosy, purple flowers with burgundy calyxes. New foliage emerges with a burgundy cast in spring. Best performance comes in full sun with well drained soils. Agastache are well-adapted to thrive in dry soils and are right at home in rock gardens where it will attract hummingbirds, butterflies, and honeybees. This is one of the easiest perennials to grow.