Blue False Indigo is a perennial flower that looks like a shrub during the growing season. Slow-growing in its first few years, Blue False Indigo eventually becomes a 4 foot mound of pale blue-green foliage. In early summer, before many other flowers bloom, it bursts with large blue-purple flowers on tall spikes. The flowers attract the occasional hummingbird. Attractive dark seedheads replace flowers in the fall, but can droop if not supported by nearby plants. If desired, prevent flopping by cutting back a third of the foliage after flowering or removing stalks of spent flowers.