| Size | |
|---|---|
| Common Name | |
| Type | |
| Family | |
| Native? | Non-Native |
| Zone | 5, 5b, 6, 7, 8, 8b, 9 |
| Height Range (ft.) | 3.00 to 6.00 |
| Spread (ft.) | 3.00 to 6.00 |
| Bloom Time | |
| Bloom Description | large, Mophead flowers, Vibrant blue |
| Sun | |
| Water | |
| Maintenance | |
| Suggested Use | Border, foundation plantings, specimen shrub, Woodland Garden |
| Tolerate | |
| Growth Rate |
Hydrangea macrophylla ‘Nikko Blue’ is a classic mophead hydrangea with large blue flower clusters and lush foliage, ideal for shaded borders and foundation beds.
$172.99
Please note: Sizes 1.5 Gallon and up can’t be shipped outside the counties of Nassau, Suffolk, Brooklyn, and Queens.
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| Size | |
|---|---|
| Common Name | |
| Type | |
| Family | |
| Native? | Non-Native |
| Zone | 5, 5b, 6, 7, 8, 8b, 9 |
| Height Range (ft.) | 3.00 to 6.00 |
| Spread (ft.) | 3.00 to 6.00 |
| Bloom Time | |
| Bloom Description | large, Mophead flowers, Vibrant blue |
| Sun | |
| Water | |
| Maintenance | |
| Suggested Use | Border, foundation plantings, specimen shrub, Woodland Garden |
| Tolerate | |
| Growth Rate |
Hydrangea macrophylla ‘Nikko Blue’, commonly known as Blue Hydrangea, is a classic mophead hydrangea cherished for its large, sky-blue flower clusters that bloom in early to mid-summer. This deciduous shrub reaches 4 to 6 feet tall and wide, with a rounded, bushy habit and lush green foliage. The vivid blue color appears in acidic soils, while flowers may turn lavender or pink in neutral to alkaline conditions. ‘Nikko Blue’ blooms on old wood, so protection from harsh winter weather and minimal pruning are key for consistent flowering year to year.
Iconic blue blooms: Produces bold, rounded clusters of flowers in acidic soils
Lush structure: Dense foliage and full form bring beauty even when not in bloom
Classic favorite: A long-standing garden staple for timeless summer color
Sun exposure: Prefers part shade—morning sun with afternoon shade is ideal
Soil needs: Moist, well-drained soil with organic matter; acidic soil keeps blooms blue
Maintenance: Low—prune only after flowering to preserve next year’s buds
Shaded borders: Adds bold color beneath trees or near walls
Foundation plantings: Softens building lines with rounded form and bloom
Cottage gardens: A perfect companion to ferns, astilbes, and native perennials
Pollinator attraction: Fertile blooms support bees and other insects
Seasonal interest: Colorful flowers and textured foliage enhance summer gardens
Low deer impact: Typically not preferred by browsing wildlife
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Nikko Blue thrives in partial sun, preferring morning sunlight with afternoon shade to protect it from intense summer heat. It needs moist, well-drained, rich soil to perform at its best. Regular watering is crucial, especially during hot or dry periods, to maintain lush foliage and abundant blooms.
Yes, it does. Nikko Blue is famous for its true blue flowers in acidic soil (pH below 6). In more neutral or alkaline soils, the blooms may shift toward lavender or pink. To keep the flowers a vibrant blue, you can amend your soil with products like aluminum sulfate.
At maturity, Nikko Blue typically reaches 4–6 feet tall and wide, forming a rounded, full shrub. It makes a bold statement in the landscape with its large, globe-shaped clusters of vivid blue flowers.
Nikko Blue blooms on old wood, meaning its flower buds form the previous growing season. Expect beautiful blossoms in early to mid-summer, usually starting in June and lasting through July or August under good conditions.
Because it blooms on old wood, Nikko Blue should only be lightly pruned immediately after flowering if needed. Heavy pruning in fall or spring can remove the next year’s flower buds. Focus on removing any dead wood and spent blooms after the initial summer flowering.
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