Moderate to grow

woolly white alder

Clethra tomentosa 'Cottondale'

Overview

Woolly White Alder (Clethra tomentosa 'Cottondale') is an amazing plant that has a great deal to offer to gardeners. This versatile shrub grows up to six feet tall and its dense mounded habit makes it ideal for a variety of uses. Its fragrant white flowers bloom from July to August and attract pollinators to the garden. The evergreen foliage is covered in a coat of furry "wool" that give it a unique and attractive look. Its deep roots make it a drought-tolerant variety and it is also tolerant of a variety of soil types. It is a great addition to any lawn or garden and the striking look and fragrance of the blooms will certainly enliven any space.

Care Guide

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Watering

For the Woolly White Alder, it’s best to water thoroughly once a week in the summer and every 10 days during the cooler months. Be sure to water deeply until the soil is moist and water reaches the root zone, then allow the soil to dry out in between waterings. The Woolly White Alder will prefer slightly moist soils at all times, but avoid overwatering as this could cause root rot or fungus.

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Light

Woolly white alder (Clethra tomentosa 'Cottondale') grows best in sites with full sun to part shade. In full sun, the plant will produce more flowers for longer periods. When planted in shady spots, the flowers will have a reduced bloom time but will still look attractive. When grown in full sun, the plant should be given 4-6 hours of direct sunlight per day. When grown in part sun, 2-4 hours of direct sunlight in the morning or late afternoon is ideal for this plant species.

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Temperature

Hardiness zone 7-9.

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Pruning

Woolly White Alder (Clethra tomentosa 'Cottondale') should be pruned in late winter or early spring. Prune the plant to maintain its desired size and shape. Remove weak and damaged branches, and any branches that are growing excessively. Be careful not to remove too much of the plant, as it can cause stress. If needed, lightly prune any new growth after flowering in late summer.

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Propagation

Stem Propagation, Layering Propagation, Division, Grafting Propagation, Seed Propagation

Uses & Symbolism

Attracts: Butterflies.

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