Hydrangea macrophylla 'Diamond Rouge'Diamond Rouge Hydrangea

The Hydrangea macrophylla ‘Diamond Rouge’, or Diamond Rouge Hydrangea, is a deciduous shrub renowned for its stunning cone-shaped flower clusters. Blooming in midsummer, the flowers transition from pure white to rich pink and then to deep red, creating a spectacular multi-seasonal display. Its compact growth habit, reaching 1–1.2 meters tall, makes it perfect for borders, mixed garden beds, or as a feature in containers.

Low-maintenance and striking, Diamond Rouge adds vibrant color and elegance to gardens and landscapes.

Specifications

• Height1–1.2 meters
• Width1–1.2 meters
• Native toCultivar origin from Hydrangea species native to Japan and Korea
• FoliageMedium green, ovate leaves; deciduous
• Growth rateModerate

Conditions

• SoilPrefers moist, well-drained, slightly acidic to neutral soils enriched with organic matter
• LightFull sun to partial shade; blooms best in partial shade in hot climates
• WaterModerate; water regularly, especially in dry periods
• ClimateThrives in temperate and subtropical regions

Additional Features

• FlowersCone-shaped clusters transition from white to pink to red; blooms midsummer to autumn
• FormCompact, bushy habit with showy flowers
• UsesIdeal for borders, mixed garden beds, hedges, or containers
• SpacingPlant 1 meter apart for dense coverage or individual displays
• Low MaintenanceRequires minimal pruning; remove spent blooms to encourage new growth
• Pest ResistanceHardy and generally pest-free
• Seasonal AppealSpectacular blooms in summer and autumn; foliage provides interest until dormancy
• VersatilityComplements cottage, formal, and modern garden styles

The Diamond Rouge Hydrangea is a bold and versatile shrub, perfect for adding vibrant color, texture, and seasonal beauty to gardens and outdoor spaces.