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The Plant Guide

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Bigleaf hydrangea

Hydrangea macrophylla 'Nikko Blue'

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This is a well-loved and vigorous cultivar with large, rounded flower heads of a rich, gorgeous blue.

Noteworthy CharacteristicsThis is one of the most widely recognized species of hydrangeas, and boasts a plentiful number of cultivars. The species is divided into two groups: the Hortensias (or "mopheads") have globe-shaped flowers made up of large male flowers, and the Lacecaps have flattened flower heads, with central, female blossoms ringed in larger, male blossoms. 

Care'Nikko Blue' flowers on the previous season's wood, and can be maintained by cutting back just to the first pair of buds beneath the old flower in spring.  Grow in moist, but well-drained soil, in sun to partial shade. Provide shelter from drying winds.

PropagationSow seed in cold frame in spring; take softwood cuttings in early summer, hardwood cuttings in winter.

ProblemsGray mold, slugs, powdery mildew, rust, ringspot virus, leaf spots.

  • Genus : Hydrangea
  • Plant Height : 3 to 6 feet
  • Zones : 6, 7, 8, 9
  • Plant Width : 6 to 10 feet
  • Uses : Containers
  • Tolerance : Frost Tolerant
  • Light : Full Sun to Partial Shade
  • Maintenance : Low
  • Moisture : Medium Moisture
  • Growth Rate : Moderate
  • Characteristics : Showy Seed Heads
  • Plant Type : Shrubs
  • Bloom Time : Summer
  • Plant Seasonal Interest : Summer Interest
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