Hibiscus syr Blue Angel #3A vigorous, compact, deciduous shrub producing sky? blue, red? throated trumpet flowers from summer into fall. Prefers full sun to part shade and well? drained, moderately fertile soil. Extreme heat, drought, and deer tolerant with low pest disease susceptibility. Works well as a flowering hedge or accent. Attracts bees, butterflies, hummingbirds and other pollinators.