Clusters of tubular orange-yellow flowers bloom continuously, starting in springtime through summer and into fall. At times, the plant is engulfed in floral brilliance. If grown in warm zones, or outside on the summer patio, the flowers attract hummingbirds, bees and other pollinators. Cestrum Orange Zest is a rapid grower and can be pruned to maintain size and shape at any stage of its growth. The flowers are lightly fragrant at night.