False holly

Sun

Full sun to partial shade; afternoon shade is helpful in hot climates. Protect from cold, drying winds.

Water

Water regularly while establishing; once rooted, it tolerates short dry spells but grows best with occasional deep watering during prolonged drought.

Soil

Well-drained, humus-rich soil, preferably slightly acidic to neutral. It tolerates clay if drainage is good, but not persistently waterlogged ground.

Height

8-15 ft (2.4-4.6 m), occasionally taller with age

Spread

6-10 ft (1.8-3 m)

Flowers

Small, fragrant white flowers in autumn, sometimes continuing into early winter; partly hidden among the leaves.

Foliage

Evergreen. Glossy, leathery, dark green leaves in opposite pairs. Young growth often has sharply toothed, holly-like leaves; older branches may carry leaves with few teeth or smooth edges.

Growth

Slow to moderate

Care needed

Low

• Water deeply during dry weather for the first two growing seasons.
• Spread 2-3 in (5-8 cm) of organic mulch over the root area, keeping it clear of the stems.
• Apply a balanced slow-release fertiliser in spring only if growth is weak or the soil is poor.
• Keep the root area well drained; do not allow irrigation to leave the soil constantly wet.
• Shelter young plants from drying winter winds, especially near the colder end of their range.

Pruning. Prune in spring after the risk of severe frost has passed, removing dead or damaged wood and shortening misplaced shoots. For hedges, trim lightly in late spring; repeated summer clipping can reduce autumn flowering.

Early spring

Check for winter damage and remove dead shoots once healthy growth is easy to identify.

Spring

Plant in workable soil, water thoroughly and mulch the root area.

Late spring

Trim hedges lightly and selectively shorten shoots that spoil the outline.

Summer

Water young plants during dry spells and check leaf undersides and stems for scale insects.

Late summer

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

Autumn

Enjoy the fragrant flowers and water before winter if the soil is dry.

• Plant as a dense evergreen boundary hedge or screen where a slower-growing alternative to vigorous hedging is wanted.
• Use behind hydrangeas and shade perennials to provide a dark, year-round backdrop.
• Place near a path or seating area where the autumn scent can be noticed, allowing room so spiny leaves do not obstruct passage.
• Use a lightly shaped specimen in a courtyard or Japanese-style garden for permanent structure.

Garden styles it suits: Formal, Traditional, Japanese, Woodland, Sensory garden and Winter interest.

Plant it with: Japanese maple, Camellia, Hydrangea, Hellebore, Japanese forest grass and Autumn fern.

Wildlife: The flowers provide late-season forage for visiting insects. Dense evergreen growth offers shelter for small birds; dark fruits may develop when suitable pollination occurs, but are often sparse in gardens.

• Scale insects can cause sticky honeydew and black sooty mould; remove small infestations by hand or use a labelled horticultural oil at the appropriate stage.
• Root rot can develop in saturated soil; improve drainage and move affected plants out of persistently wet sites.
• Cold, drying winds can brown leaves and kill shoot tips; provide shelter, maintain soil moisture and prune damaged growth in spring.
• Leaf scorch can follow drought or intense afternoon sun; water deeply and provide afternoon shade in hot locations.

Not known to be toxic to cats, dogs, horses or people. No part is generally recognised as poisonous, but the leaves and fruits should not be treated as food; the stiff leaf spines can scratch skin.

• English holly (Ilex aquifolium)

  English holly has alternate leaves, while false holly has opposite pairs. Female English hollies commonly bear red berries; false holly has small dark fruits when it fruits.

• Fortune's osmanthus (Osmanthus × fortunei)

  This hybrid usually has larger leaves with more numerous, regularly spaced teeth and makes a larger shrub. False holly generally has smaller leaves with fewer, coarser spines, though cultivated forms vary.

• Sweet olive (Osmanthus fragrans)

  Sweet olive usually has larger, unarmed leaves with smooth or finely toothed margins, rather than the coarse holly-like spines typical of young false holly growth.

Osmanthus means 'fragrant flower' in Greek, heterophyllus means 'different-leaved', and false holly refers to its resemblance to true holly.

Propagation. Take semi-ripe cuttings in late summer and root them in a free-draining medium with gentle bottom heat if available; rooting can be slow. Seed is possible but germination is slow and variable, and named cultivars do not come true from seed.

Accepted botanical name

Osmanthus heterophyllus

Native range

Japan, Korea, Nansei-shoto and Taiwan.

Measured

Soil pH 5 to 6.5. Average height 457 cm.

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