Evergreen shrubs or sub-shrubs grown for their panicles of showy, tubular flowers, produced over a long period in summer and into autumn. The lance-shaped, dark green leaves mostly in opposite pairs. Best in a shrub or herbaceous border, or against a wall. can spread by means of suckers. Grow in full sun and fertile, moist, well-drained soil. may need some protection in very cold, frost prone areas.