A compact ornamental onion prized for its tidy, upright clumps of strappy grey-green foliage and rounded, two-inch flower clusters that emerge pale pink and deepen to purple as they mature. Blooming through the heat of summer, it makes a long-lasting addition to borders and rock gardens and pairs well with other sun-loving perennials. Its neat, clumping habit keeps it from spreading aggressively, and the dried seed heads add texture to the fall garden.