Slender deutzia

Sun

Full sun to partial shade. Give it afternoon shade in hot climates; heavy shade reduces flowering.

Water

Moderate; keep the root zone evenly moist during establishment and water during prolonged dry spells. Avoid waterlogged soil.

Soil

Well-drained soil enriched with organic matter. Tolerates clay, loam and sandy soil, provided drainage and moisture are adequate.

Height

2-5 ft (0.6-1.5 m)

Spread

2-5 ft (0.6-1.5 m)

Flowers

White, five-petalled flowers in upright clusters in late spring to early summer.

Foliage

Opposite pairs of pointed, finely toothed green leaves; autumn colour is usually modest.

Growth

Moderate

Care needed

Low

• Water deeply during dry weather through the first growing season.
• Apply 2-3 in (5-8 cm) of organic mulch, keeping it clear of the stems.
• Top-dress with compost in spring; use a balanced fertiliser only if growth is weak or the soil is poor.
• Water established shrubs during prolonged drought, especially in hot, exposed positions.
• Allow room for the arching stems rather than repeatedly shearing the shrub.

Pruning. Prune immediately after flowering because next year's flowers form on older growth. Shorten flowered shoots to a strong side shoot and, on established shrubs, remove up to one-third of the oldest stems at ground level.

Autumn

Plant while the soil is workable and moist; in very cold regions, wait until spring.

Late winter

Check for broken or dead stems and remove them without trimming healthy flowering wood.

Spring

Refresh mulch and top-dress with compost before vigorous growth begins.

Late spring to early summer

After flowering finishes, prune flowered shoots and thin out the oldest stems.

Early summer

Take softwood cuttings from healthy, non-flowering shoots.

Summer

Water during prolonged dry spells and check for leaf scorch in hot positions.

• Plant as a loose, low flowering hedge beside a path or along a border.
• Place at the front of a shrub border with taller shrubs behind its arching stems.
• Combine with spring bulbs and hardy geraniums for flowers before and after its main display.
• Use beside a lightly shaded woodland edge, where white flowers stand out against darker foliage.

Garden styles it suits: Cottage garden, English country, Traditional, Woodland, White garden and Small-space.

Plant it with: Hardy geraniums, Hostas, Japanese painted ferns, Daffodils, Columbines and Spireas.

Wildlife: The flowers attract bees and other visiting insects. Dense branching can provide cover for small birds.

• Few flowers: avoid winter or early-spring trimming, which removes flower buds, and move the shrub to better light if heavily shaded.
• Brown leaf edges or wilting in summer: water deeply, maintain mulch and provide afternoon shade in hot climates.
• Root decline in wet soil: improve drainage or replant in a better-drained position; do not leave the roots standing in water.
• Aphids on young shoots: wash small colonies off with water and encourage natural predators; use insecticidal soap if an infestation persists.

Not known to be toxic to people, cats, dogs or horses. No part is recognised as poisonous, but it is not an edible plant and eating substantial amounts may cause digestive upset.

• Fuzzy deutzia (Deutzia scabra)

  Usually a much taller shrub, with larger, conspicuously rough or hairy leaves and denser flower clusters; many garden forms have double flowers.

• Sweet mock orange (Philadelphus coronarius)

  Usually taller, with larger, strongly fragrant flowers bearing four petals rather than deutzia's five.

• Bridal wreath spirea (Spiraea prunifolia)

  Has alternate leaves rather than opposite pairs, and its familiar garden form carries small, double white flowers along the branches.

Deutzia honours the Dutch botanical patron Johann van der Deutz, while gracilis means slender or graceful, referring to the plant's habit.

Propagation. Take softwood cuttings in late spring or early summer and root them in a moist, free-draining propagation mix under cover. Low branches can also be layered.

Accepted botanical name

Deutzia gracilis

In the US and Canada

Introduced in the lower 48 states.

Native range

Japan.

Measured

Soil pH 5 to 7. Average height 91 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.