How to grow camellia
Overview
Camellia japonica is an evergreen shrub prized for its glossy foliage and formal, rose-like flowers in winter and early spring. It thrives in part shade and acidic soil, making it a classic structural plant for cool-climate gardens.
Varieties
- Camellia japonica 'Alba Plena' — Classic white double flowers, very hardy and reliable in cool climates.
- Camellia japonica 'Lady Loch' — Large soft-pink blooms with a formal shape, popular in Australian gardens.
- Camellia japonica 'Nuccio's Gem' — Pure white, peony-form flowers on a compact bush, excellent for pots.
Soil Preparation
Camellias demand acidic soil with a pH of 5.5–6.5. Before planting, incorporate composted pine bark or peat moss to lower pH and improve drainage. Avoid alkaline soils or liming; add sulphur if needed to correct pH.
Growing Guide
Plant camellias in a sheltered spot with morning sun and afternoon shade, especially in warmer zones. Space 1–2 m apart and plant with the root ball slightly above soil level to prevent collar rot. Water deeply after planting and maintain even moisture through the first two summers. Avoid heavy clay soils; improve drainage with gypsum and organic matter if needed.
Care
Feed with a slow-release azalea/camellia fertiliser in early spring and again after flowering. Prune lightly after bloom to shape and remove dead wood; avoid heavy pruning as camellias set next year's buds on current growth. Mulch with pine bark or peastraw to keep roots cool and moist.
Companion Planting
Camellias pair beautifully with azaleas, rhododendrons, and hydrangeas for a layered shade garden. Avoid planting near eucalypts or other deep-rooted trees that compete for moisture and create dry root zones.
Common Pests & Risks
Scale insects and mites can cause yellowing leaves and sooty mould; treat with horticultural oil in early spring. Petal blight appears as brown spots on flowers; remove fallen blooms and avoid overhead watering to reduce spread.
Troubleshooting
Yellow leaves: caused by alkaline soil or iron deficiency; treat with iron chelate and check pH. Brown leaf edges: result of dry air or wind burn; increase humidity and shelter from hot winds. Bud drop: often from overwatering or sudden temperature changes; water consistently and avoid drastic swings. Sooty mould: indicates scale or aphid infestation; control pests first, then wash leaves with mild soapy water.