Genus Azalea Species x Cultivar 'Western Lights' Common Name Western Lights Deciduous Azalea Patent ID Height 4 to 5 Feet Spread 4 to 5 Feet Habit Large, rounded shrub. Moderate growth rate. Zone 4 to 8 Culture Full sun to partial shade. Flower Pink flowers in May. Flower Color Pink Foliage Medium to dark green. Deciduous. Categories: Azalea Deciduous Shrub Description The ‘Northern Lights’ series was developed at the University of Minnesota for extreme cold hardiness and excellent flowering.