Position: Full sun or partial shade.
Soil: Moist yet well drained, fertile soil.
Flowering Period: July - September.
Rate of Growth: Moderate.
Habit: Hydrangea macrophylla 'Mariesii Perfecta' grows to be a medium sized, rounded shrub.
Height: 2 m (6 ft)
Spread: 2.5 m (8 ft)
Notes: The flowers will be a lilac-blue colour in acidic soils and turn purple or pink on neutral or slightly alkali soils. This was formerly called Hydrangea macrophylla 'Blue Wave'.