Azaleas are a very popular flowering shrub often used in borders, foundation planting and for naturalizing. They are a form of rhododendron and can be either evergreen or deciduous (lose their leaves in winter). Azaleas can be low and trailing, tall and upright, or anything in between. They are prolific bloomers with flowers in almost every color. Depending on the variety, they will produce single, semi-double or double flower forms and can begin blooming as early as late March or as late as mid-June. Some of the newest varieties will bloom in spring and again in late summer or early fall. The double bloom time variety is the Encore Azalea.