Reference specimenAccession  SKU-01348

Clethra tomentosa 'Cottondale'

Clethra 'Cottondale'

At a glance
Hardiness
USDA Zones 6–9
Sun
Full Sun, Part Shade
Soil
Well-drained, Moist, Acid
Mature size
Height 6–8 Feet · Spread 6–8 Feet
Growth rate
Moderate
Seasonality
Deciduous
Clethra tomentosa 'Cottondale'
Clethra tomentosa 'Cottondale', Clethra 'Cottondale' at Woodlanders
A plant Woodlanders once offered on our catalogue

This variety is no actively in production in our propagation house and may not return to our catalogue. We maintain this page purely for reference and archival purposes. If you would like to grow this plant, tell us. Your interest helps guide what we bring back.

For a larger installation or commercial project, write hello@woodlanders.net.

Clethra alnifolia and the southern Clethra tomentosa are stoloniferous deciduous shrubs commonly called Summersweet or Sweet Pepperbush. They form colonies in moist acid soil and make good garden subjects. They are valued for their terminal spikes of fragrant white flowers in summer. Plant in sun or semi-shade and provide adequate moisture. This clone of the southern species has light colored backs of leaves and amazing flower racemes up to 16 inches long! This Woodlanders introduction is a plant we selected from the wild in the Florida Panhandle. It was the highest rated Clethra clone tested in trials at Longwood Gardens. Clethra tomentosa is native to the southern U.S.

Flower, Fruit & Foliage

14 inch long racemes, unknown color

Flower Structure: Produces fragrant, white flower spikes.

Blooming Season: Blooms in mid to late summer, usually from July to August.

Color: The flowers are white, creating a striking visual display against the dark green foliage.

Care

Light Requirements: Prefers partial shade to full sun. While it can tolerate full shade, flowering is more prolific in full sun to partial shade.

Soil Requirements: Thrives in moist, acidic, well-draining soil. Prefers a pH range of 5.0 to 6.5. Incorporating organic matter such as compost can improve soil fertility and structure. It can tolerate wet soils and is suitable for rain gardens and boggy areas.

Watering: Requires regular watering, especially during dry periods. Keep the soil consistently moist but not waterlogged. Adequate moisture is crucial, particularly during the first growing season to establish a deep root system.

Temperature and Humidity: Hardy in USDA zones 6-9. Prefers moderate temperatures and can tolerate both humid and dry conditions. It is adaptable to a range of climates within its hardiness zones.

Fertilization: Apply a balanced, slow-release fertilizer in early spring to support healthy growth and abundant flowering. An annual application of compost or well-rotted manure can further enhance soil fertility.

Pruning: Prune in late winter or early spring to remove dead or damaged branches and to shape the shrub. Light pruning can help promote a denser growth habit and more prolific flowering. Remove spent flower spikes after blooming to maintain a tidy appearance.

Pests and Problems: Generally pest-resistant but can occasionally attract aphids, spider mites, and caterpillars. Ensure good air circulation to prevent fungal diseases like powdery mildew. If pests are detected, treat with insecticidal soap or neem oil.