A new cultivar of hybrid Azalea named ‘AZ 15’ that is characterized by its repeat blooming habit, its bright red flowers with deeper red flecks on the upper surface of the petals, its mature foliage that is dark green and pest free with the new growth very pubescent, its strong and disease free root system, its stems and flower buds that are resistant to cold damage, its cold hardiness at least to U.S.D.A. Zone 7, and its ability to be readily propagated by softwood stem cuttings.