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Adolphe Audusson Camellia (Japanese Camellia) care

Camellia japonica 'Adolphe Audusson'

Also called Japanese Camellia, Adolphe Audusson.

RHS H4USDA 7-9Pet-safeIndoor 2-4 m tall

Watering rhythm

5-7days

Every 5-7 days in the growing season; keep consistently moist but not waterlogged

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Light

Bright indirect light (just back from a sunny window)

Soil

Moist, well-draining ericaceous (acid) compost or loam

Humidity

50-65%

Temp

0-25°C

Pet safety

Pet-safe

Mature size

2-4 m tall

Care at a glance

Light

Bright but filtered. Adolphe Audusson Camellia burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Prefers dappled light or morning sun with afternoon shade, particularly in warmer regions. Avoid harsh midday sun, which bleaches flowers and scorches foliage. North- or west-facing walls in the UK are ideal. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering adolphe audusson camellia: every 5-7 days in the growing season; keep consistently moist but not waterlogged. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Camellias are sensitive to drought during bud formation (late summer to autumn). Use rainwater or soft water where possible, as lime in hard tap water can raise pH and cause chlorosis over time.

Soil and pot

Adolphe Audusson Camellia grows best in moist, well-draining ericaceous (acid) compost or loam. Requires acidic soil with a pH of 5.0-6.0. In neutral or alkaline garden soils, grow in a container using ericaceous compost. Avoid planting in frost pockets, as flower buds are vulnerable to late frosts. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Adolphe Audusson Camellia sits happiest at around 50-65% humidity and 0-25°C (32-77°F). Tolerates the typical outdoor humidity of temperate gardens. Regular misting benefits container plants kept in sheltered spots. Avoid placing near heating vents indoors, which cause bud drop. If you keep the room above 0 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed adolphe audusson camellia sparingly. Feed with a specialist camellia or ericaceous fertiliser in early spring after flowering and again in early summer. Avoid feeding after midsummer, as this can hinder bud hardening and increase frost vulnerability. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on adolphe audusson camellia in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Bud drop — Sudden bud loss is usually caused by drought during bud set (summer-autumn), over-watering, or rapid temperature fluctuations. Keep soil consistently moist through late summer and shelter from cold winds.
  • Petal blight (Ciborinia camelliae) — Brown, water-soaked patches on flowers that spread rapidly. Remove affected blooms promptly and clear fallen petals; the fungal spores overwinter in soil.
  • Chlorosis — Yellow leaves with green veins signal iron deficiency from alkaline soil or hard water. Apply chelated iron feed and switch to rainwater for irrigation.
  • Scale insects — Brown lumps on stems causing sticky honeydew and sooty mould. Treat with horticultural oil in spring when scales are in the crawler stage.
  • Frost damage to buds — Frosted buds turn brown and fail to open. Protect with horticultural fleece during sharp frosts, and avoid east-facing positions where rapid thawing damages buds.

Companion plants

Adolphe Audusson Camellia pairs well with Rhododendron, Pieris japonica, Skimmia japonica, and Hellebores. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Take semi-ripe cuttings of 8-12 cm in mid-summer, dip in rooting hormone, and insert into a 50:50 perlite and ericaceous compost mix with gentle bottom heat. Rooting takes 8-12 weeks. Alternatively, layer a low branch in late summer for transplanting the following year. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Adolphe Audusson Camellia is pet-safe. The ASPCA lists Camellia (common camellia, Camellia japonica) as non-toxic to cats, dogs and horses. Ornamental camellias pose no known poisoning risk, though any plant can cause mild stomach upset if a pet eats a large amount. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Adolphe Audusson Camellia care — frequently asked questions

What is the common name for Camellia japonica 'Adolphe Audusson'?

Camellia japonica 'Adolphe Audusson' is most commonly called Adolphe Audusson Camellia, but it is also known as Japanese Camellia, Adolphe Audusson. The names refer to the same species, so care instructions for Adolphe Audusson Camellia apply identically to anything sold as Japanese Camellia.

How much light does adolphe audusson camellia need?

Adolphe Audusson Camellia grows best in bright indirect light (just back from a sunny window). Prefers dappled light or morning sun with afternoon shade, particularly in warmer regions. Avoid harsh midday sun, which bleaches flowers and scorches foliage. North- or west-facing walls in the UK are ideal.

How often should I water adolphe audusson camellia?

Water adolphe audusson camellia every 5-7 days in the growing season; keep consistently moist but not waterlogged. Camellias are sensitive to drought during bud formation (late summer to autumn). Use rainwater or soft water where possible, as lime in hard tap water can raise pH and cause chlorosis over time. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is adolphe audusson camellia toxic to cats and dogs?

Adolphe Audusson Camellia is pet-safe. The ASPCA lists Camellia (common camellia, Camellia japonica) as non-toxic to cats, dogs and horses. Ornamental camellias pose no known poisoning risk, though any plant can cause mild stomach upset if a pet eats a large amount.

What USDA hardiness zone does adolphe audusson camellia grow in?

Adolphe Audusson Camellia is rated for USDA zone 7-9 and RHS hardiness H4. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Adolphe Audusson Camellia deep-dive guides

Every aspect of adolphe audusson camellia care, each with its own calibrated guide:

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Adolphe Audusson Camellia is also commonly called Japanese Camellia or Adolphe Audusson.