Sweet box

Sun

Partial to full shade; protect from strong afternoon sun, especially in hot or dry gardens.

Water

Keep evenly moist while establishing. Established plants tolerate some dry shade, but water during prolonged drought, particularly beneath trees.

Soil

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

Height

1-2 ft (0.3-0.6 m)

Spread

3-5 ft (0.9-1.5 m), eventually wider through suckering

Flowers

Winter to early spring; tiny, creamy-white flowers with a strong, sweet fragrance, followed by glossy black berries.

Foliage

Evergreen. Narrow, pointed, leathery dark-green leaves held on low, arching stems.

Growth

Slow, spreading steadily once established

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Heat tolerant
• Wildlife
• Low allergen
• Fragrant

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1.5 ft (0.45 m)

   full size

About 8 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

In the garden

Spreads vigorously: plan to contain it.

Growth rate

Slow

• Water regularly through the first growing season, allowing excess water to drain away.
• Mulch in spring with leaf mould or compost, keeping it clear of the stem bases.
• Water established plants during prolonged dry spells if leaves begin to curl or lose their sheen.
• Apply a light, balanced shrub feed in spring only if growth is weak or the soil is poor.
• Remove or transplant rooted suckers if the patch spreads beyond its allotted space.

Pruning. Prune after flowering in spring, removing dead or damaged stems and shortening stray shoots. Avoid routine shearing; the natural low, arching shape needs little correction.

Winter

Enjoy the fragrant flowers; check plants in exposed sites for drying winds and frost damage.

Early spring

After flowering, remove damaged stems and trim only where needed.

Spring

Mulch with compost or leaf mould and transplant unwanted rooted suckers.

Summer

Check soil moisture beneath trees and water during prolonged drought.

Late summer

Take semi-ripe cuttings from healthy, non-flowering shoots.

Autumn

Plant in mild climates while the soil is moist; in cold regions, wait until spring.

• Plant beside a shaded entrance or path so the winter fragrance is easy to notice.
• Use as an evergreen groundcover beneath deciduous trees and tall shrubs.
• Combine with hellebores, ferns and spring bulbs for a layered woodland planting.
• Use its dark foliage as a quiet backdrop to pale flowers in a sheltered courtyard.

Garden styles it suits: Woodland, Winter interest, Sensory garden, Low-maintenance, Secret garden and Green on green.

Plant it with: Hellebores, Snowdrops, Hardy cyclamen, Epimediums, Japanese painted ferns and Solomon's seal.

Wildlife: Flowers provide pollen and nectar for insects active during mild winter weather. Birds may eat the berries, and established patches offer low evergreen cover.

• Yellowing or scorched leaves in strong sun: provide afternoon shade and check soil moisture.
• Wilting or root rot in waterlogged soil: improve drainage or move the plant; do not keep the roots saturated.
• Winter leaf burn in exposed sites: shelter from cold, drying winds and remove damaged growth in spring.
• Occasional scale insects: inspect stems and leaf undersides, remove small colonies by hand, and use a locally approved horticultural oil if needed, following the label.

Not known to be toxic to people, cats, dogs or horses. The berries are ornamental, not edible fruit; discourage eating them, as swallowing plant material can cause stomach upset.

• Sweet box (Sarcococca confusa)

  Usually grows into a much taller, rounded shrub with broader, glossy leaves rather than a low, suckering groundcover; its ripe berries are also black.

• Fragrant sweet box (Sarcococca ruscifolia)

  Forms a taller, bushier shrub with broader leaves and red ripe berries, rather than the black berries of dwarf sweet box.

• Japanese spurge (Pachysandra terminalis)

  Has toothed leaves clustered near the shoot tips and upright terminal flower spikes; sweet box has smooth-edged leaves and tiny flowers tucked into the leaf axils.

Sarcococca comes from Greek words meaning fleshy berry, hookeriana honours the botanist Joseph Dalton Hooker, and humilis means low-growing.

Propagation. Separate rooted suckers in spring or autumn and replant promptly. Alternatively, take semi-ripe cuttings in late summer; rooting can be slow.

Accepted botanical name

Sarcococca hookeriana digyna Sarcococca hookeriana var. humilis is an older name for Sarcococca hookeriana digyna.

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