The Nikko Blue Hydrangea (Hydrangea macrophylla) is a compact shrub with vibrant, round flower clusters that shift color based on soil pH—blue in acidic soil, purple in neutral, and pink in alkaline. Blooming from late spring through summer, regular deadheading extends its season. Deep green leaves contrast beautifully with the flowers. Thriving in zones 6-9, it prefers partial sun and moist, well-draining soil. Growing 4-6 feet tall and wide, it suits gardens, foundation plantings, and containers. Annual compost or fertilizer enhances growth, making it a versatile, striking addition to any landscape.
Unique Plant Features:
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Soil pH affects flower color—acidic soil turns flowers blue, neutral soil makes them purple, and alkaline soil turns them pink.
- Flowers from late spring through summer; regular removal of spent blooms encourages new growth.
- Thrives in partial sun (morning sun, afternoon shade) and moist, well-draining soil. Tolerates full sun with daily watering.
- Grows 4-6 feet tall and wide, making it perfect for containers, foundation plantings, or flower beds.
- Suitable for zones 6-9; in colder areas, provide winter protection or move indoors.
Warning: Not for Human or Animal Consumption
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Sunlight Full Sun / Partial Shade
Flower Color
Blue
Foliage Color
Green
Mature Width
4-6 ft
Mature Height4-6 ft
Growing Zones 6,7,8,9
