Allium Summer Beauty is a compact ornamental onion with a dense clump of slender green leaves and rounded pale lavender-pink flower heads in midsummer. Mature flowering clumps stand about 18 inches tall and spread 12 to 18 inches, fitting naturally along sunny border fronts, paths, and patio containers. The persistent foliage stays attractive through the growing season while the flowers draw pollinators and provide useful stems for cutting.
Give this bulbous perennial full sun or partial shade and fertile soil that drains freely. Water after planting and during dry spells, allowing the soil to drain freely. Apply a balanced liquid fertilizer every few weeks during active growth, and divide established clumps every few years. Remove old flower stems and foliage after flowering.