Verbena officinalis, the common vervain or common verbena, is a perennial herb native to Europe. It grows up to a metre/yard high, with an upright habitus. The lobed leaves are toothed, the delicate spikes hold mauve flowers.
Beautiful climber with truly bell-like deep velvet-blue flowers. The unusual buds open creamy green then change to rosy-violet and finally mature to a deep purple, from late Summer to early-mid Fall.