Robust, hardy, drought-tolerant plants that will delight you with their tall, bottle-brush-like spikes of scented flowers over rich green foliage. Supplied in a 9cm pot. Black Adder
- violet-blue. Flowers July-October. Height 70-120cm (2-4'). Back of border variety. Supplied as large, well established potted plants that can be planted straight into their final positions in borders or patio containers.