Genus Azalea Species x Cultivar 'Roblex' Autumn Lilyâ„¢ Common Name Autumn Lilyâ„¢ Encore Azalea Patent ID PPAF Height 4 to 4.5 Feet Spread 3 to 4 Feet Habit Strong, upright growth habit. Moderate growth rate. Zone 6 to 9 Culture Full sun to partial shade. Flower White, with occasional single purple stripes, single flowers. Spring, summer and again in fall. Flower Color White, with occasional single purple stripes Foliage Deep green foliage. Evergreen. Categories: Azalea Encore® Evergreen Shrub Description Photo courtesy of Encore Azalea.