Verbena bonariensis produces lavender flower heads formed from tightly-clustered florets, held stiffly upright on branching stems. These long-lasting blooms are a magnet for bees & butterflies, & this elegant perennial is at its most effective when planted in large swathes. Verbena bonariensis is enjoying a resurgence in popularity, associating beautifully with grasses in a tranquil planting scheme, or adding a touch of architectural style to the back of herbaceous borders.