Hydrangea ‘Nikko Blue’

Hydrangea macrophylla 'Nikko Blue'

Hydrangea ‘Nikko Blue’ (Hydrangea macrophylla ‘Nikko Blue’) is a beloved deciduous shrub known for its vibrant blooms and lush foliage. This classic cultivar produces large, rounded flower clusters, which emerge in early summer and persist through late summer. The blooms display a stunning shade of true blue in acidic soils or transition to pink in alkaline conditions, offering versatility and charm to garden settings. Its glossy, dark green leaves provide a striking contrast to the bright flowers, enhancing the plant’s visual appeal.

This hydrangea reaches 4–6 feet in height and width, forming a rounded, bushy habit ideal for borders, hedges, or as a focal point in mixed plantings. Hardy in USDA zones 6–9, ‘Nikko Blue’ thrives in areas with mild winters and performs best in part shade to full sun. While it tolerates various soil types, the plant prefers moist, well-drained, organically rich soil. Consistent moisture is essential for vibrant blooms and healthy growth. Its elegant form makes it a favorite for cottage gardens, woodland settings, or formal landscapes.

This hydrangea is relatively easy to care for, making it a popular choice among gardeners. Regular watering, especially during dry periods, helps maintain lush foliage and colorful blooms. Mulching around the base aids in retaining soil moisture, suppressing weeds, and regulating root temperature. Fertilize in early spring with a balanced, slow-release fertilizer to encourage robust growth and prolific flowering. Pruning should be done after flowering to shape the plant and remove spent blooms. Avoid heavy pruning, as this shrub blooms on old wood.

Care Instructions

• Light: Part shade to full sun; afternoon shade in hot climates.
• Soil: Moist, well-drained, organically rich; adjust pH for bloom color.
• Watering: Consistent watering, especially in dry periods.
• Fertilization: Use balanced fertilizer in early spring.
• Pruning: Prune lightly after flowering; avoid cutting old wood.
• Winter Protection: Apply mulch to shield roots in colder areas.

Hydrangea ‘Nikko Blue’ adds timeless beauty to any landscape with its striking blooms and adaptability. Its extended flowering season and vibrant colors make it a versatile and rewarding plant for gardeners.