24-48" tall and 24-48" wide. Caryopteris × clandonensis 'Longwood Blue' is a fantastic mid-sized shrub for landscape beds, perennial borders, and as a mass foundation planting. Hardy in zones 5-9, ‘Longwood Blue’ can be pruned hard to the ground each year to produce evenly-rounded, fresh growth. In colder zones, low winter temperatures can kill the top growth to the ground; otherwise, cut plants back in the spring. Plant in full sun in average to moist, but well-drained soil. 'Longwood Blue' is drought tolerant once established. For maximum impact, plant in groups of three or more. Will sometimes sucker and spread in warmer climates.