Azaleas, once known as genus Azalea, are now included in genus Rhododendron, although most people usually consider rhododendrons and azaleas to form two separate groups. In this case, the name azalea is usually applied to small rhododendrons with small leaves and small five-stamened flowers that are often grown as indoor plants. The name azalea includes several species and numerous hybrids. They are sold as potted flowering plants and rarely grow to more than 50 cm indoors. The many cultivars have single, semi-double or double blooms in shades of white, pink, red and salmon. The flowers appear from December to May depending on the cultivar (early, mid-season or late).