Common boxwood

Sun

Full sun to partial shade; afternoon shade helps in hot climates. Shelter from drying winter winds, especially near its cold limit.

Water

Keep the root zone evenly moist while establishing. Established plants tolerate short dry spells, but need deep watering during prolonged drought; avoid waterlogged soil.

Soil

Well-drained loam, clay or sandy soil with organic matter; neutral to alkaline soil is ideal, though mildly acidic soil is tolerated.

Height

15-20 ft (4.6-6.1 m) if left unclipped; occasionally taller with age

Spread

10-15 ft (3-4.6 m) if left unclipped

Flowers

Small, inconspicuous yellow-green flowers in spring.

Foliage

Evergreen. Small, opposite, oval, leathery leaves, usually glossy dark green above and paler beneath. Foliage may bronze in winter and has a distinctive musky smell.

Growth

Slow, usually about 3-6 in (8-15 cm) a year, depending on conditions.

Care needed

Medium

• Plant with the root flare at soil level; do not bury the base or plant in a wet hollow.
• Water deeply during dry weather for the first two growing seasons, directing water onto the soil rather than the foliage.
• Apply 2-3 in (5-8 cm) of organic mulch, keeping it clear of stems; avoid digging around the shallow roots.
• Feed lightly in spring only if growth is weak or a soil test indicates a deficiency; avoid late-season nitrogen.
• Check regularly for caterpillars, webbing and sudden leaf loss; clean tools between plants and remove fallen diseased leaves.
• Water container plants during dry winter spells and protect their roots from severe freezing.

Pruning. Clip after the main spring flush has firmed, once frost risk has passed; choose a dry, overcast day and keep hedge bases wider than their tops. Thin crowded branches selectively to admit air and light, and avoid hard clipping during drought or late enough to encourage tender growth before frost.

Late winter

Check for wind scorch, frost damage and loose roots; wait until spring growth reveals which branches are dead.

Spring

Refresh mulch, water if the soil is dry, and feed lightly only where needed.

Late spring

Clip hedges and topiary after new growth firms; clean tools before moving to another plant.

Summer

Inspect for box tree moth caterpillars and leafminer damage; water deeply during prolonged dry spells.

Early autumn

Remove fallen diseased foliage and check drainage before wetter weather.

Late autumn

Water before the ground freezes if conditions are dry, and shelter exposed containers from cold winds.

• Clip into low edging around rose beds or kitchen-garden plots to give planting a clear outline.
• Use as parterre or knot-garden hedging, contrasting its dark foliage with gravel and low herbs.
• Place clipped cones, balls or other topiary beside entrances and along paths for repeated architectural shapes.
• Grow as an informal evergreen backdrop to spring bulbs, hellebores and flowering perennials.

Garden styles it suits: Formal, English country, French parterre, Tudor knot garden, Topiary garden and Winter interest.

Plant it with: Roses, Lavender, Catmint, Hellebores, Snowdrops and Hardy geraniums.

Wildlife: Spring flowers provide pollen and nectar for visiting insects. Dense, unclipped growth offers shelter for birds and small animals; tightly clipped plants provide fewer flowers and less cover.

• Box blight: brown leaf spots, black stem streaks and rapid defoliation can spread in damp conditions. Remove affected material and fallen leaves, avoid overhead watering, disinfect tools and improve airflow; replace repeatedly affected plants with another species.
• Box tree moth: caterpillars produce webbing and can strip plants quickly. Inspect inside the canopy, hand-pick small infestations, or use a locally approved caterpillar treatment while larvae are young, following its label.
• Boxwood leafminer: larvae cause swollen, blistered leaves, often with yellow patches. Remove affected shoots before adults emerge; seek locally appropriate treatment advice for severe infestations.
• Root rot: persistently wet soil causes yellowing, decline and root death. Improve drainage, stop excessive watering and replace badly affected plants rather than replanting boxwood in the same wet conditions.

All parts contain toxic alkaloids, including the leaves and bark. Ingestion can poison people, cats, dogs and horses, causing vomiting or diarrhoea and, in larger amounts, serious neurological or heart effects; poisoning can be fatal, particularly in horses. Keep clippings away from animals and seek medical or veterinary advice after ingestion. Sap may irritate sensitive skin.

• Japanese holly (Ilex crenata)

  Leaves are alternate, usually with fine rounded teeth, rather than opposite and smooth-edged. Female plants may carry black berries; boxwood produces dry capsules.

• Japanese boxwood (Buxus microphylla var. japonica)

  Leaves are generally broader and rounder, often lighter green and sometimes notched at the tip. Cultivars overlap in appearance, so a reliable label may be needed.

• Box honeysuckle (Lonicera nitida)

  Has thinner leaves on slender, arching shoots and grows much faster. It can produce paired small cream flowers and purple berries, unlike boxwood's dry capsules.

Buxus is the Latin name for box, and sempervirens means 'always green', referring to its evergreen foliage.

Propagation. Take semi-ripe cuttings in late summer or early autumn and root them in a free-draining medium under humid, sheltered conditions. Use healthy stock because cuttings can carry pests and disease; seed is slow and does not preserve cultivar characteristics.

Accepted botanical name

Buxus sempervirens

In the US and Canada

Introduced in the lower 48 states.

Native range

Albania, Algeria, Austria, Belgium, Corse, France, Germany, Great Britain, Greece, Iran, Italy and Libya.

Measured

Soil pH 7.5 to 8. Average height 338 cm.

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