Peruvian lily plants (Alstroemeria), also known as Lily of the Incas, are striking late spring or early summer, half-hardy perennial bloomers that are available in a myriad of colors including pink, white, orange, purple, red, yellow and salmon. Flowers resemble azaleas and make a beautiful addition to an indoor bouquet. Keep reading to learn more about how to plant a Peruvian lily in the garden.