Overview

Clethra tomentosa 'Cottondale' is a bushy shrubs in the genus Clethra, part of the Clethraceae family, with deciduous foliage. Clethra tomentosa 'Cottondale' grows best in partial shade, and tolerates loam and sand soils and acid pH. Its UK hardiness is rated H5. Suggested uses include cottage and informal garden and low maintenance.

About

Clethra tomentosa 'Cottondale', known as woolly white alder 'Cottondale', is a bushy, deciduous cultivar of the Clethra genus. These shrubs are noted for their simple leaves and small, fragrant, white bell-shaped flowers arranged in racemes or panicles. 'Cottondale' thrives in partial shade with a sheltered aspect, preferring fertile, moist but well-drained acidic soils such as loam or sand. Hardy to UK zone H5, it is suitable for cottage and informal gardens and is low maintenance, flowering in spring and summer.

About the genus

Clethra is a genus of flowering shrubs or small trees erected as a genus by Linnaeus in 1753.

Wikipedia contributors, "Clethra", CC BY-SA 4.0Clethra

Growing conditions

Best soil and position for Clethra

Sunlight
Partial shade
Soil type
Loam, Sand
Soil pH
Acid
Soil moisture
Moist but well-drained
Aspect
South-facing, North-facing, West-facing, East-facing
Exposure
Sheltered
UK hardiness
H5

Plant details

Clethra tomentosa 'Cottondale' size, habit and characteristics

Plant type
Shrubs
Habit
Bushy
Foliage
Deciduous
Suggested uses
Cottage and informal garden, Low Maintenance

Care notes

Pruning and caring for Clethra tomentosa 'Cottondale'

Propagation
Seed in spring or autumn, Softwood cuttings in early summer
Pest resistance
Generally pest-free
Disease resistance
Generally disease-free

Frequently asked questions

Where is the best place to plant Clethra tomentosa 'Cottondale'?

Clethra tomentosa 'Cottondale' prefers partial shade. It suits sheltered positions.

What soil does Clethra tomentosa 'Cottondale' need?

Clethra tomentosa 'Cottondale' grows best in loam and sand soil. It prefers acid soil. Aim for soil that stays moist but well-drained.

Is Clethra tomentosa 'Cottondale' hardy in the UK?

Clethra tomentosa 'Cottondale' has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.

How do I propagate Clethra tomentosa 'Cottondale'?

Seed in spring or autumn, Softwood cuttings in early summer.