Hydrangea macrophylla 'Nikko Blue' (hydrangea 'Nikko Blue') is a member of the Hydrangeaceae family. This deciduous shrub exhibits a bushy growth habit and is characterised by its deciduous foliage. It has a hardiness rating of hardy (cold winter [-15 to -10ºc]) and is hardy throughout most of the UK, even in severe winters. May not withstand open or exposed sites or central/northerly locations, with many evergreens suffering foliage damage and plants in pots being at increased risk.
When fully mature, Hydrangea macrophylla 'Nikko Blue' can reach an ultimate height of 1–1.5 metres and a spread of 1–1.5 metres. For optimal growth, it prefers an east–facing, north–facing, or west–facing aspect and a sheltered position. It thrives best in clay or loam soil types and should be placed in partial shade.
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