One of my personal favorites, with strong sturdy growth, a lovely compact habit , masses of sumptuous, arching purple flowers complimenting the light green downy leaves and stems. One metre or 3ft high and wide. Needs a sunny position, enjoy watching the butterflies fly about. Quite tender, it will put up with -5 C so therefore for most gardens its best to lift and bring under cover before replanting the following spring. Well worth the effort.