Botanical profile

Clethra alnifolia 'Ruby Spice'

Latin name
Clethra alnifolia 'Ruby Spice'
Common name
Clethra 'Ruby Spice'
Type
Shrub
Family
Clethraceae

Clethra alnifolia ‘Ruby Spice’ is a highly sought-after ornamental shrub for its fragrant summer flowering and its deep pink to rosy red floral hue, more intense than that of other Clethra cultivars. It develops a dense, rounded, shrub-like habit, perfectly suited for beds, informal hedges, and naturalistic plantings, especially in moist soils. In summer, its long, upright clusters of nectar-rich flowers abundantly attract pollinating insects, adding significant ecological value to the garden. Its deciduous dark green foliage turns golden yellow in autumn, extending its ornamental interest into the late season. Very hardy and well-adapted to Quebec conditions, ‘Ruby Spice’ stands out for its robustness, colorful flowering, and excellent tolerance to fresh to waterlogged soils.

Care guide

Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 3
Exposure
Partial shade
Watering
Regular watering
Fertilization
Acid-loving fertilizer in spring. Fertilize monthly or as directed on the bag. Not recommended – use Bionik rooting agent or ground bone.
Soil type
Moist to waterlogged, acidic to neutral
Minimum temperature
'-34°C
Plant appearance

Blooming, foliage and shape

Blooming period
Summer
Flower color
Pink
Fruiting
Small persistent brown capsules
Foliage color
Green
Foliage type
Obsolete
Shape
Shrubby
Garden structure

Size and growth

Height
1.2 to 1.5 m (4 to 5 feet)
Width
1.5 m (5 feet)
Growth rate
average
Pet friendly
Safe 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.