Easy to grow, lilies add cheer to the summer garden and fresh floral displays. Both Asiatic and Oriental lilies are available for sale online. Asiatic lilies bloom in early to midsummer while Oriental lilies bloom in mid to late summer. Grown from bulbs, lilies are sun-loving perennials that grow best in well-drained soil. They look best when grown in groups and are available in an array of colors, including red, pink, orange, white and other hues. Some lily varieties are very fragrant. Most lilies are suitable for growing in zones 3-8. When selecting lily bulbs for sale online, consider their mature height and spread, bloom time and flower color.