Hydrangea macrophylla ‘Nikko Blue’
Big Leaf Hydrangea

• This rounded shrub grows to 3-6 feet tall and wide.

• It is native to China and Korea and can be notoriously hard to grow well in the Cincinnati area.

• Big Leaf hydrangea requires afternoon shade and rich, consistently moist, deeply mulched soil.

• Nikko Blue is a cultivar that produces enormous round flowers in the summer. 

• Horticulturist’s Notes: These hydrangeas will produce blue flowers in low pH soil and pink flowers in high pH. Amend with ammonium sulfate and lots of organic matter to achieve blue flowers.