Summer Beauty ornamental onion sends up airy, two-inch globes of pale lavender-pink flowers on wiry stems well above its neat clump of grassy foliage, providing color through the heat of midsummer when many perennials are between bloom cycles. It is a magnet for bees and butterflies and the flowers hold their color for weeks, making them excellent as cut or dried flowers. Unlike some ornamental onions, it is sterile and will not self-seed into a nuisance.