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Clethra delavayi (Delavay summersweet)

Beginner
skill rating
1 hour care
per year
4m
Max height
4m
Max spread
10-20 years
To maturity

Plant details

Botanical name

Clethra delavayi

Other names

Delavay summersweet

Genus

Clethra Clethra

Species

C. delavayi - C. delavayi is an erect, deciduous shrub with lance-shaped, veined, toothed, dark blue-green leaves turning orange and red in autumn and, in summer, dense, racemes of pink buds opening to fragrant, nodding, cup-shaped, white flowers.


Clethra delavayi is: Deciduous

Fragrance

Flowers have a spicy fragrance.

Habit

Erect

Flower

White in Summer

Foliage

Dark-green in Spring; Dark-green in Summer; Orange, Red in Autumn

How to care

Watch out for

Pests

Generally pest-free.

Diseases

Generally disease-free.

General care

Pruning

Pruning group 1. Remove some of the oldest, weakest stems from the base in winter.

Propagation

Surface sow thinly at 25C in spring or autumn.

Propagation methods

Seed, Softwood cuttings


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Where to grow

Clethra delavayi (Delavay summersweet) will reach a height of 4m and a spread of 4m after 10-20 years.

Suggested uses

Waterside, Low Maintenance, Cottage/Informal, Beds and borders, Wildlife, Woodland

Cultivation

Grow in fertile, moist but well-drained, acid soil in partial shade. Do not allow soil to dry out. Tolerates clay.

Soil type

Clay, Loamy, Sandy

Soil drainage

Moist but well-drained

Soil pH

Acid

Light

Partial Shade, Full Shade

Aspect

North, South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

Companion plants

Botanical name

Clethra delavayi

Other names

Delavay summersweet

Genus

Clethra Clethra

Species

C. delavayi - C. delavayi is an erect, deciduous shrub with lance-shaped, veined, toothed, dark blue-green leaves turning orange and red in autumn and, in summer, dense, racemes of pink buds opening to fragrant, nodding, cup-shaped, white flowers.

Foliage

Deciduous

Fragrance

Flowers have a spicy fragrance.

Habit

Erect


Colour

Flower

White in Summer

Foliage

Dark-green in Spring; Dark-green in Summer; Orange, Red in Autumn


How to care

Watch out for

Pests

Generally pest-free.

Diseases

Generally disease-free.

General care

Pruning

Pruning group 1. Remove some of the oldest, weakest stems from the base in winter.

Propagation

Surface sow thinly at 25C in spring or autumn.

Propagation methods

Seed, Softwood cuttings


Monthly care advice


Where to grow

Clethra delavayi (Delavay summersweet) will reach a height of 4m and a spread of 4m after 10-20 years.

Suggested uses

Waterside, Low Maintenance, Cottage/Informal, Beds and borders, Wildlife, Woodland

Cultivation

Grow in fertile, moist but well-drained, acid soil in partial shade. Do not allow soil to dry out. Tolerates clay.

Soil type

Clay, Loamy, Sandy

Soil drainage

Moist but well-drained

Soil pH

Acid

Light

Partial Shade, Full Shade

Aspect

North, South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 10, Zone 9, Zone 8, Zone 7, Zone 6

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This plant likes... Garden match
Soil types: Clay, Loamy, Sandy Tell us...
Soil drainage: Moist but well-drained Tell us...
Soil pH: Acid Tell us...
Light: Partial Shade, Full Shade Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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