Camellia

Sun

Partial shade or bright, filtered light; protect from hot afternoon sun and cold, drying winds. Avoid exposed sites where early morning sun hits frost-covered flowers.

Water

Keep the root zone evenly moist but never waterlogged. Water deeply during dry spells, especially while flower buds develop in summer; containers need more frequent checks.

Soil

Acidic, humus-rich, well-drained soil, ideally pH 5.0-6.5. On chalky or alkaline ground, grow in a container of ericaceous potting mix.

Height

10-20 ft (3-6 m), sometimes taller with age

Spread

6-12 ft (1.8-3.7 m)

Flowers

Late winter to spring, with timing varying by climate and cultivar. Flowers are white, pink, red or variegated, in single, semi-double or double forms.

Foliage

Evergreen. Leathery, glossy, dark green leaves with finely toothed edges; new growth is lighter green.

Growth

Slow to moderate; size and vigour vary considerably by cultivar.

Care needed

Medium

• Plant with the top of the root ball level with, or slightly above, the surrounding soil; do not bury the stem base.
• Water deeply during dry weather, including summer when next season's flower buds are forming.
• Apply 2-3 in (5-8 cm) of leaf mould or fine bark mulch, keeping it clear of the stems.
• Feed lightly with a fertiliser for acid-loving shrubs after flowering, following the label rate; avoid late-season feeding.
• Use collected rainwater where tap water is hard, especially for plants in containers.

Pruning. Prune just after flowering, before new flower buds develop: remove dead or crossing branches and shorten shoots only where needed. Avoid routine shearing, which spoils the natural shape and can remove future flowers.

Late winter

Check container moisture and shelter flowering plants from cold winds; use horticultural fleece during sharp frosts if practical.

Spring

Collect fallen and blighted flowers promptly, especially where camellia petal blight occurs.

After flowering

Prune lightly if needed, apply a modest feed and refresh the mulch.

Summer

Water consistently during dry spells to support flower-bud formation; inspect leaf undersides for scale insects.

Early autumn

Plant in mild areas while the soil is warm, provided you can keep the root ball moist.

Late autumn

Move containers to a sheltered position and insulate pots where prolonged freezing is likely.

• Plant beneath high, open tree canopies with ferns and hostas for evergreen structure and spring colour.
• Use as a specimen beside a sheltered entrance, allowing room for its mature spread.
• Grow in a large container on a shaded patio where garden soil is alkaline.
• Combine with rhododendrons and pieris in an acidic-soil border for successive flowering and contrasting foliage.

Garden styles it suits: Woodland, Japanese, Traditional, Southern, Modern courtyard and Winter interest.

Plant it with: Rhododendrons, Japanese pieris, Japanese maples, Hostas, Hellebores and Japanese painted ferns.

Wildlife: Single and semi-double flowers with exposed stamens can provide pollen and nectar for visiting insects during mild weather. Densely double flowers offer much less access; mature shrubs also provide shelter for small birds.

• Scale insects: pale mottling and scales on leaf undersides can weaken growth. Prune badly affected shoots and use a horticultural oil labelled for camellias, following temperature restrictions.
• Camellia petal blight: rapidly spreading brown patches spoil flowers. Remove affected blooms and fallen flowers promptly; replace contaminated surface mulch and avoid moving it elsewhere.
• Root rot: wilting despite wet soil often indicates poor drainage. Correct drainage, reduce watering and keep the stem base uncovered; severely affected plants may need replacing.
• Bud drop or poor flowering: summer drought, waterlogging and abrupt weather changes can cause buds to fall. Keep moisture steady, improve drainage and avoid pruning after flower buds have formed.

Not known to be toxic to cats, dogs, horses or people. Leaves, flowers and seeds are not recognised as poisonous, though eating plant material can still cause mild digestive upset.

• Sasanqua camellia (Camellia sasanqua)

  Usually flowers in autumn to early winter, with smaller leaves and often smaller, fragrant flowers whose petals fall separately. Japanese camellia generally flowers later and has larger, glossier leaves.

• Williams camellia (Camellia × williamsii)

  Often has smaller, less glossy leaves and sheds spent flowers more readily. Cultivars overlap in appearance, so a label or reliable planting record may be needed.

• Tea plant (Camellia sinensis)

  Has small, usually white flowers with conspicuous yellow stamens, generally in autumn, rather than the large ornamental blooms typical of Japanese camellia.

Camellia honours the Jesuit missionary and botanist Georg Joseph Kamel, while japonica means 'of Japan'.

Propagation. Take semi-ripe cuttings in late summer and root them in an acidic, free-draining medium with humidity and gentle bottom heat; rooting can be slow. Layering is another option. Seed-grown plants vary and may take many years to flower.

Accepted botanical name

Camellia japonica

In the US and Canada

Introduced in the lower 48 states.

Native range

China North-Central, China Southeast, Japan, Korea, Nansei-shoto and Taiwan.

Measured

Average height 560 cm.

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