Botanical profile

Hydrangea paniculata 'Red Diamond'

Latin name
Hydrangea paniculata 'Red Diamond'
Common name
Panicle Hydrangea 'Diamant Rouge'
Type
Ornamental shrub
Family
Hydrangeaceae

Hydrangea paniculata ‘Diamant Rouge’ is a highly prized shrubby hydrangea for the exceptional intensity of its red coloration at the end of its flowering period. This variety is distinguished by its conical panicles, initially creamy white, rapidly evolving to pink, then a deep and luminous red, among the most sustained of the paniculatas. Its overall habit is compact, upright, and well-structured, with a silhouette taller than wide, ideal for ornamental beds, low flowering hedges, and solitary plantings. Like all Hydrangea paniculata, ‘Diamant Rouge’ blooms on new wood, ensuring reliable and abundant flowering every summer, even after harsh winters. The medium green deciduous foliage strongly highlights the spectacular transformation of the flowers and extends ornamental interest into autumn. Robust and very decorative, it makes an excellent choice for Nordic and contemporary gardens.

Care guide

Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 3
Exposure
Full sun to partial shade
Watering
Moderate, drought tolerant once established
Fertilization
Balanced fertilizer (10-10-10), in early spring. One application is sufficient.
Soil type
Ordinary to rich, well-drained, slightly acidic to neutral soil
Minimum temperature
'-34°C
Plant appearance

Blooming, foliage and shape

Blooming period
July to October
Flower color
Red
Fruiting
Brown capsules, barely visible.
Foliage color
Green
Foliage type
Obsolete
Shape
Upright and flared, slightly conical, well-branched
Garden structure

Size and growth

Height
1.5 to 2 m (5 to 7 feet)
Width
1.5 m (5 feet)
Growth rate
Fast — sustained development, ideal for quickly creating volume in a clump or low hedge, strong structure from the 2nd year.
Not recommended for pets
Not recommended for pets

Pets

Pollinators
Attracts or supports pollinating insects

Pollinators

Butterflies
Plants that attract butterflies

Butterflies

The availability of our plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may be offered for a limited time only, depending on their natural cycle or current stock. These plant profiles are designed to guide and inspire you when choosing plants for the garden, landscaping projects, containers or long-lasting outdoor arrangements.