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Nikko Blue Hydrangea
The classic, large-flowered, blue mophead Hydrangea, 'Nikko Blue' is prized for its vigor and the LOADS of large blue to pink flower clusters it produces during summer. The flowers will be a rich blue in acidic soil and pink in alkaline soil. The prolific blooms appear on rounded, bushy plants that grow to about 4 to 5 feet tall and wide. The cut flowers are carried on strong stems making them great for fresh or dried cut flower arrangements. So make sure to plant one in your cut flower garden! More details below

Nikko Blue Hydrangea

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Nikko Blue Hydrangea
Hydrangea macrophylla 'Nikko Blue'

USDA Plant Hardiness Zones: 5a-9b  Find Your Zone > 

Note: For our customers who live and garden north of USDA Cold Hardiness Zone 5a, where this Hydrangea is not reliably winter hardy, you'll be happy to know that it can be grown in containers that can be brought indoors during winter and place back outside when temperatures warm up in spring.



Special Attributes

The classic, large-flowered, blue mophead Hydrangea, 'Nikko Blue' is prized for its vigor and the LOADS of large blue to pink flower clusters it produces during summer. The flowers will be a rich blue in acidic soil and bright pink in alkaline soil. The cut flowers are carried on strong stems making them great for fresh or dried cut flower arrangements. 




Landscape & Garden Uses

Growing naturally 4 to 5 feet tall and wide in a rounded mound, Nikko Blue Hydrangea can be grown in garden beds or containers. It is ideal for use as a specimen or accent in home foundation plantings, flowering shrub borders and perennial gardens. In larger landscape spaces it is especially dramatic in small to large groupings or in straight or staggered rows as a colorful hedge.

Spacing:  3-4' for solid hedges;  8' or more for space between plants





Cultural Preferences

Nikko Blue Hydrangea is very easy to grow in most any moist but well-drained soil with average fertility and full sun to part shade in northern zones and part shade (morning sun with afternoon shade or filtered sun) in southern zones. For best flowering, we suggest 4 hours of direct sun light per day. As with so many other ornamental plants, a constantly soggy or wet soil is problematic. Flower color is your choice. Acidic soils will make blue flowers while a neutral to slightly alkaline soil will make pink flowers.

Note:  Nikko Blue is a Hydrangea macrophylla species that produces its flowers from buds that formed on "old wood" (during the previous year). This means that even though it is tempting to cut them back in the winter, when they are only bare sticks jutting out of the ground, don't do it. The flower buds are already formed and hidden in those bare sticks, so don't cut them off if you want flowers.

Get tips for proper pruning time and technique in our article titled How To Prune Various Types Of Hydrangea 




Helpful Articles

Click on a link below to get helpful advice from our experts on how to plant and care for mophead Hydrangeas.






Plant Details 

USDA Plant Hardiness Zones: 5a-9b  Find Your Zone > 
Shrub Type:  Deciduous Flowering Shrub
Height at Maturity:  4-5'
Width at Maturity: 4-5'
Spacing:  3-4' for hedges; 7' or more for space between plants
Growth Habit / Form:  Bushy, Dense, Rounded
Flower Color:  Blue or Pink depending on soil pH
Flower Size:  Large - up to 8" inch diameter
Flowering Period:  Summer
Flower Type:  Single in large, round clusters
Fragrant Flowers:  No
Foliage Color:  Green
Fragrant Foliage:  No
Berries:  NA
Berry Color:  NA
Sun Needs:  Part Shade (South) - Sun or Part Shade (North)
Water Needs:  Average
Soil Type:  Clay (amended), Loam, Sand (amended), Silt 
Soil Moisture / Drainage:  Well Drained Moist
Soil pH:  6.0 - 8.0 (Moderately Acid to Moderately Alkaline)
Maintenance / Care:  Low
Attracts:  Visual Attention
Resistances:  Disease, Heat, Humidity, Insect



Plant Long & Prosper!

Questions?  Contact Us >


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