Azalea, Northern Lights Overview Category: Shrubs Common Name: Azalea, Northern Lights Botanical Name: Rhododendron 'Northern Lights' Sun Exposure: Part to full sun Height: 4-5 ft. Spread: 5-6 ft. See notes | Back to shrubs Notes Flowers of medium size in beautiful shades of light to deep pink. Prefers light shade, but also does well in full sun. Plants are reliably hardy with flower buds surviving -40°F. From the University of Minnesota.