Azaleas require constantly moist soil. Do not allow your azalea to dry out too much or it will lose many of its leaves and flowers. It is equally important that your plant has good drainage and is not left standing in water.
Bright light is needed, especially for azaleas to re-bloom. In lower light, an azalea will thin out by dropping many of its leaves. To prolong the bloom period , keep your plant out of direct sun, and away from hot or cold drafts.
Feed your azalea often. Fertilizing throughout the year will keep your azalea actively growing. An all purpose, or high acid fertilizer will work best.
Azaleas respond well to pruning. Cut back after bloom and continue to trim and shape as needed. While in bloom, flowers will last much longer if the plant is kept cool (around 60F degrees).