The Encore series of azaleas grows back every year in the fall and spring. Other series’ of azaleas do not grow back every year, unless you prune them before mid-summer.Click to see full answer. Correspondingly, are azaleas an annual or perennial?Azaleas are neither perennials or annuals. They are shrubs with woody branches that last from year to year. Some azaleas, however, are not cold-hardy and will freeze below 25 degrees F and are treated as single-season plants like annuals. Annuals are plants that sprout, flower, set seed and die within a year.One may also ask, how do you winterize azaleas? To properly winterize your Azaleas, saturate their root structure with water when you start seeing frost and the ground starts to freeze. Do this early in the morning, and then again in the evening. This will help your Azaleas acclimate to freezing during the winter. Just so, will my azalea flower again? There is a variety of Azaleas that blooms more than once; it is called the Encore series. If you have this type of azalea it can bloom again in the summer and in the fall. If you do not have this type of azalea it will not bloom again, and you need to prune them before July.Do azaleas need pruning? When To Prune Azaleas Prune azaleas soon after they bloom in the spring or early summer. The perfect time is when spent flowers begin to discolor and shrivel. Cutting them back in late summer, fall, or winter will remove flowerbuds and keep them from blooming.