Clethra alnifolia 'Ruby Spice'
Clethra alnifolia 'Ruby Spice' – Ruby Spice Summersweet
Clethra alnifolia 'Ruby Spice' – Ruby Spice Summersweet
Exposure
- Sun
- Part shade
- Full shade
Rusticity
Bloom time
- July
- August
- September
- Intensely fragrant pink flowers
- Spectacular late summer blooms
- Golden yellow autumn foliage
- Perfect for moist soils
- Outstanding full shade tolerance
Ruby Spice summersweet ignites the late summer landscape with its spectacular spikes of deep pink flowers that hold their rich color without fading. This native shrub releases a heavenly, sweet fragrance that perfumes the entire garden just as other blooms begin to fade. It animates shaded corners and moist areas beautifully, thriving with vigour where few other plants can establish successfully.
Characteristics
- Foliage : The deciduous leaves emerge a lustrous dark green during the growing season before transforming into a brilliant golden yellow in autumn.
- Flowering / Fruiting / Stems : Long, dense, upright spikes of a rich, non-fading pink appear from late July through September. The flowers give way to small, decorative seed capsules that persist throughout the winter.
- Light : It tolerates full sun to full shade, offering exceptional versatility for dark garden areas.
- Habit : It deploys an upright, compact, and well-branched dense silhouette.
- Growth : Its moderate growth rate allows it to reach a mature height and spread of approximately 120 cm to 150 cm.
- Soil : It demands an acidic, organic-rich soil that remains consistently fresh to moist. It adapts easily to heavy clay soils and deficient drainage.
- Temperature : Its excellent hardiness corresponds to Canadian zone 4.
- Resistance : It withstands flooding, urban pollution, and salt spray admirably while demonstrating great immunity against major diseases.
Use
- Types of use : Integrate it into shrub borders, mixed flowerbeds, woodland gardens, or along the edges of water features. Its size fits perfectly for large container planting to brighten up a shaded patio.
- Decorative advantages : It provides an impeccable vertical structure, an explosion of late-season pink color, and a flamboyant autumn coloration that extends seasonal landscape interest.
Maintenance
- Watering : Water regularly to maintain a uniformly moist soil at all times, especially during summer heatwaves. Apply an organic mulch at the base to preserve root freshness.
- Fertilization : Spread rich compost or an fertilizer formulated for acid-loving plants early in the spring to support development.
- Pruning : Prune severely in late winter or early spring since flower buds develop on the new wood of the current year. Remove suckers if you wish to limit its spread.
- Planting : Maintain a spacing of 120 cm to 150 cm between plants to ensure a harmonious deployment.
Plant details
Dimensions
Dimensions
Characteristics
Characteristics
Habit:
- Upright
- Bushy
Flowering colours:
- Pink
Plant needs
Plant needs
Watering:
- Tolerates moist soil
- Tolerates wet soil
- Moderate
Maintenance:
- Easy
- Prune in spring
Soil requirement:
- Moist
- Acidic
- Rich
- Clay
Features
Features
Resistance:
- Disease
- Humidity
- Shade
- Salt
Attract:
- Pollinators
- Butterflies
- Beneficial insects
Use:
- Pond side
- Border
- Mass planting
- Flowerbed
- Container
- In ground
Attribute:
- Autumn colour
- Long blooming
- Fragrant
- Native
- Small space landscaping

Related articles
-
Trees and shrubs for small space landscaping
Read the articleHaving an exceptional garden is possible, even in the city! Discover our selection of trees and shrubs perfect for small lots, and transform your outdoor space into a green oasis.
-
When and how to plant shrubs: successful planti...
Read the articleDiscover our complete guide to mastering shrub planting and care. Learn the best planting times, essential techniques, along with tips for watering, fertilizing, and managing common issues. Our practical advice...
-
Choosing shrubs to plant
Read the articleIn exterior design, shrubs represent furniture. They set the scene and set the tone for the flower bed. Shrubs constitute the living architectural elements of the landscaped garden. As proof,...
-
Shrubs: beautiful all year long
Read the articleLe grand choix d’espèces fournit l’occasion de varier les formes, les feuillages, et de créer des floraisons successives, bref, de composer un jardin magnifique à longueur d’année. Pour toutes ces...