Nikko Blue Hydrangea is a classic bigleaf hydrangea known for its large, rounded clusters of vivid blue flowers. In acidic soil, the blooms develop their strongest blue color, while less acidic soil may produce lavender or pink tones. Its bold summer flowers and lush green foliage make it a beautiful choice for foundation plantings, shaded borders, woodland edges, mixed shrub beds, and large containers. Nikko Blue also makes an excellent cut flower and brings reliable old-fashioned charm to the garden.
Plant Details
Plant Type: Flowering Shrub, Bigleaf Hydrangea
Sun Exposure: Morning Sun, Part Sun, Afternoon Shade
Bloom Color: Blue, Lavender, Pink
Bloom Time: Summer
Mature Height: 4-6 feet
Mature Width: 4-6 feet
Hardiness Zone: 6-9
Soil Moisture: Average, Moist Well-Drained
Deer Resistance: Moderate
Care Level: Easy
Pollinator Friendly: Yes
Pruning Time: After Flowering
Notes
Nikko Blue Hydrangea blooms primarily on old wood, so avoid heavy pruning in late winter or early spring. Prune only after flowering and remove dead or damaged stems as needed. Flower color is influenced by soil pH, with acidic soil producing blue blooms and more alkaline soil producing pinker flowers. In Southern gardens, morning sun with afternoon shade helps protect the foliage and flowers from intense heat. Keep the soil consistently moist, but don’t allow it to remain waterlogged.
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