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Blue HydrangeaHydrangea macrophylla 'Nikko Blue'

  • Blue Hydrangea - Hydrangea macrophylla 'Nikko Blue'

 

The blue hydrangea is the image most of us conger up in our heads when we think of hydrangeas in general. It is a timeless landscape plant that beloved by many, including Martha Stewart.

Giant, long-lasting, mophead blooms appear in the summer, adding lovely color to the landscape. These shrubs work well as stand-alone specimens or as a hedge.


Hardiness Zones

The blue hydrangea can be expected to grow in Hardiness Zones 6–9. View Map

Tree Type

This is a flowering shrub, typically planted for its profusion of flowers.

Mature Size

The blue hydrangea grows to a height of 3–6' and a spread of 3–6' at maturity.

Growth Speed Fast Growth Rate

This shrub grows at a fast rate, with height increases of more than 24" per year.

Sun Preference

Full sun and partial shade are best for this shrub, meaning it prefers a minimum of 4 hours of direct, unfiltered sunlight each day.

Soil Preference

The blue hydrangea grows in acidic, loamy, moist, rich, sandy, silty loam and well-drained soils.

Attributes

This shrub:
  • Produces giant, long-lasting blue mophead blooms measuring 4–8" in diameter. It will typically flower July through August.
  • Features large, medium to dark green leaves--4–8" long--with coarsely serrated margins.
  • Grows in a rounded shape.
  • May bloom more than once a season.
  • Should be pruned after flowering because buds form on the previous season's growth.
  • May produce blooms with a pink hue in more alkaline soils.

History/Lore

There is an overabundance of Hydrangea macrophylla cultivars, and many of them have been renamed because the original names were lost over time.