Sweet box

Sun

Partial to full shade. Tolerates some sun where summers are cool and the soil stays moist; avoid hot afternoon sun.

Water

Water regularly while establishing, keeping the root zone moist but not waterlogged. Established plants tolerate some dry shade, but benefit from deep watering during prolonged drought.

Soil

Humus-rich, well-drained soil; tolerates clay, loam and sandy soil improved with organic matter, and acidic to alkaline conditions.

Height

3-5 ft (0.9-1.5 m), occasionally taller with age

Spread

3-5 ft (0.9-1.5 m)

Flowers

Winter to early spring; small creamy-white flowers tucked into the leaf axils, strongly fragrant.

Foliage

Evergreen. Glossy, dark green, pointed oval leaves on dense, gently arching stems.

Growth

Slow

Care needed

Low

• Plant in shelter from cold, drying winds, especially near the colder end of its hardiness range.
• Water deeply during dry spells through the first two growing seasons.
• Apply 2-3 in (5-7.5 cm) of leaf mould or compost annually, keeping it clear of the stems.
• Feed lightly in spring only if growth is weak or the soil is poor.
• Keep the root zone shaded and avoid planting where water collects in winter.

Pruning. Prune lightly after flowering to shorten stray shoots and remove dead or damaged wood. Avoid routine hard clipping, which spoils its natural shape and can reduce the following winter's flowers.

Winter

Enjoy the flowers and check that nearby plants or stored items do not obstruct access to the scent.

Late winter to early spring

After flowering, remove damaged wood and lightly shorten any shoots that overhang paths.

Spring

Plant in colder districts once the soil is workable, then water thoroughly.

Spring

Refresh the organic mulch and feed lightly if growth is weak.

Summer

Water young plants during dry weather; take semi-ripe cuttings if you want more plants.

Autumn

Plant in mild districts while the soil is still warm, and check drainage before winter.

• Place beside a shaded entrance or frequently used path so the winter fragrance is easy to enjoy.
• Use as a low, informal evergreen hedge along a sheltered boundary or walkway.
• Plant beneath deciduous trees with hellebores, snowdrops and ferns for a layered woodland border.
• Use its dark foliage as a quiet backdrop to pale flowers and variegated shade plants.
• Grow in a large, well-drained container in a sheltered shaded courtyard, protecting the roots from severe frost.

Garden styles it suits: Woodland, Sensory garden, Winter interest, Modern courtyard, Traditional and Low-maintenance.

Plant it with: Hellebores, Snowdrops, Epimediums, Japanese painted ferns, Brunnera and Hardy cyclamen.

Wildlife: Flowers can provide nectar and pollen for bees and other insects active during mild winter weather. Birds may eat the berries, and the dense evergreen growth offers cover.

• Yellowing or scorched leaves in exposed sites: provide afternoon shade and shelter from drying winds, and check soil moisture.
• Wilting or root rot in waterlogged soil: improve drainage or move the plant to a raised position; do not keep watering saturated ground.
• Scale insects on stems or leaf undersides: remove small colonies by hand and use a locally approved horticultural oil if needed, following the label.
• Winter leaf burn or shoot dieback: shelter from cold winds, maintain mulch over the roots and prune damaged growth once new growth reveals what is alive.

Not known to be toxic to people, cats, dogs or horses; no specific toxic part is established. The berries are not regarded as edible, so discourage eating them. Any plant material can cause stomach upset if eaten in quantity.

• Himalayan sweet box (Sarcococca hookeriana)

  Usually has narrower, more elongated leaves and often spreads by suckers; its flowers commonly have pinkish or purplish tones at the base.

• Red-berried sweet box (Sarcococca ruscifolia)

  Produces red ripe berries rather than the black ripe berries of Sarcococca confusa; foliage and flowers can otherwise look very similar.

Sarcococca comes from Greek words meaning 'fleshy berry', while confusa means 'confused', referring to the plant's historically uncertain identity.

Propagation. Take semi-ripe cuttings in summer and root them in a sheltered propagating area. Fresh seed from ripe berries can also be sown, but germination is slow and irregular.

Accepted botanical name

Sarcococca confusa

Native range

China South-Central.

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