A Gene Aromi hybrid - yes he developed Evergreen Azaleas too! 

• Showy clusters of large, deep purple-red double flowers. Hose-in-hose ('stacked' whorls of petals) with a dark red eye blotch
• Early to mid spring
• Dense rounded form to 5-7ft 
• Part shade best
• Organic well-drained acidic soil
• If needed, prune directly after the flowers fade