|'Tardiva' is a panicle type hydrangea that is becoming increasingly available in American nurseries. It is similar in appearance to 'Floribunda' but sepals appear in 4's more often than 5's. The flowers are 6 inches long and it blooms well into fall.
H. paniculata is a large growing, deciduous shrub or small tree that reaches a height of 15 feet to 25 feet tall and 10 feet wide. Form is upright and texture is coarse. Mid July flowers are white and turn pinkish to almost purple with age. Flowers are borne in panicles and may be 8 inches long. Thrives in rich, loamy soil that is moist, but well-drained. Does well in full sun or part shade. Flowers on new wood. Because of this lovely plant's size and texture, many designers have a hard time using it correctly in the landscape. It is most at home along the edge of a sunny wooded border or where the landscape is loose and informal.