Nikko Blue Hydrangea – Classic Blue Summer Blooms
Nikko Blue Hydrangea is a beloved mophead variety known for its stunning, sky-blue blooms. These large, rounded flower clusters appear in early summer and continue into fall, especially in acidic soil conditions where their vivid blue is most intense.
This hydrangea is perfect for foundation plantings, borders, or as a colorful specimen in shaded gardens. Low maintenance and highly ornamental, it's a must-have for cottage-style or woodland landscapes.
- Iconic blue mophead flowers
- Blooms from early summer to fall
- Ideal for shade gardens and borders
- Excellent cut flowers for arrangements
- ☀️ Prefers morning sun and afternoon shade
Design Tip: Plant alongside hostas or ferns for a layered, shady garden effect.
Growing Zones: 5–9 outdoors
| Mature Height: | 4–6 ft. |
| Mature Width: | 4–6 ft. |
| Sunlight: | Part Shade |
| Botanical Name: | Hydrangea macrophylla 'Nikko Blue' |
| Growth Rate: | Moderate |
| Type: | Deciduous Shrub |
| Bloom Color: | Blue (in acidic soil) |
FAQ's
How do I get blue flowers on my Nikko Hydrangea?
To maintain blue blooms, grow it in acidic soil with a pH between 5.2 and 5.5. Adding aluminum sulfate can help.
Can Nikko Blue Hydrangea grow in full sun?
It prefers partial shade—especially afternoon shade to protect blooms from fading and leaves from scorching.
Is Nikko Blue a reblooming hydrangea?
No, it typically blooms on old wood in early to mid-summer, not throughout the season like some newer varieties.
When should I prune it?
Prune immediately after flowering to avoid cutting off next year’s flower buds, which form on old wood.
