Genus Azalea Species x Cultivar 'Lemon Lights' Common Name 'Lemon Lights' Azalea Patent ID Height 4 to 5 Feet Spread 3 to 4 Feet Habit Upright, rounded habit. Moderate growth rate. Zone 4 to 8 Culture Full sun to partial shade. Flower Lightly fragrant, yellow flowers. Blooms late spring, early summer. Flower Color Lemon yellow Foliage Medium 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.