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Plant care

Amboina Kauri (Dammar Kauri) care

Agathis dammara

Also called Dammar Kauri, Amboyna Kauri, Manila Copal.

RHS H1cUSDA 10-12Mildly toxic to petsIndoor Up to 40 m in the wild

Watering rhythm

7-10days

Every 7-10 days when the top few centimetres of soil are dry

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Light

Direct sun (at least 4-6 hours)

Soil

Well-drained, moderately fertile loam or sandy loam

Humidity

60-80%

Temp

15-32°C

Pet safety

Mildly toxic to pets

Mature size

Up to 40 m in the wild

Care at a glance

Light

Most houseplants will scorch where amboina kauri thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Best in full sun to bright light. In its native habitat it grows as a forest emergent receiving abundant direct sunlight. Container-grown specimens need the brightest possible position; direct outdoor sun is ideal in tropical to subtropical gardens. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for every 7-10 days when the top few centimetres of soil are dry for amboina kauri, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Maintain consistently moist but well-drained soil. Do not allow roots to sit in standing water. Reduce watering frequency in cooler months when growth slows.

Soil and pot

Amboina Kauri grows best in well-drained, moderately fertile loam or sandy loam. Prefers slightly acidic to neutral soil (pH 5.5–7.0). Incorporate grit or perlite into container mixes to ensure excellent drainage. A mix of loam, bark chips, and coarse sand works well for container culture. 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

Amboina Kauri sits happiest at around 60-80% humidity and 15-32°C (59-90°F). Being a tropical species, it thrives in high humidity. In dry indoor or conservatory conditions, mist foliage regularly or use a humidity tray. Good air circulation helps prevent fungal issues despite high humidity. If you keep the room above 15 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 amboina kauri sparingly. Feed monthly during the growing season (spring to early autumn) with a balanced liquid fertiliser diluted to half strength. Avoid feeding in winter when growth is minimal. 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 amboina kauri in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Yellowing leaves — Often indicates overwatering, poor drainage, or nutrient deficiency. Check soil drainage and resume a balanced feeding programme.
  • Root rot — Caused by consistently wet soil. Ensure excellent drainage and let the soil surface partially dry between waterings.
  • Spider mites — Can attack foliage in dry, warm conditions. Increase humidity and treat with an insecticidal soap spray.
  • Scale insects — Brown or white scales may colonise stems. Remove by hand or treat with horticultural oil at crawler stage.

Companion plants

Amboina Kauri pairs well with Livistona rotundifolia, Medinilla magnifica, Heliconia psittacorum, and Zingiber officinale. 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

Propagate from fresh seed sown in warm (25–28°C), moist compost as soon as seeds ripen; viability drops quickly. Semi-hardwood cuttings are difficult to root reliably but can be attempted in humid propagating conditions with bottom heat. 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

Amboina Kauri is mildly toxic to pets. Agathis dammara is not individually listed by the ASPCA. Conifer resins can cause mild irritation or gastric upset if ingested by pets. Treat with caution and keep out of reach of pets as a precautionary measure. 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.

Amboina Kauri care — frequently asked questions

What is the common name for Agathis dammara?

Agathis dammara is most commonly called Amboina Kauri, but it is also known as Dammar Kauri, Amboyna Kauri, Manila Copal. The names refer to the same species, so care instructions for Amboina Kauri apply identically to anything sold as Dammar Kauri.

How much light does amboina kauri need?

Amboina Kauri grows best in direct sun (at least 4-6 hours). Best in full sun to bright light. In its native habitat it grows as a forest emergent receiving abundant direct sunlight. Container-grown specimens need the brightest possible position; direct outdoor sun is ideal in tropical to subtropical gardens.

How often should I water amboina kauri?

Water amboina kauri every 7-10 days when the top few centimetres of soil are dry. Maintain consistently moist but well-drained soil. Do not allow roots to sit in standing water. Reduce watering frequency in cooler months when growth slows. 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 amboina kauri toxic to cats and dogs?

Amboina Kauri is mildly toxic to pets. Agathis dammara is not individually listed by the ASPCA. Conifer resins can cause mild irritation or gastric upset if ingested by pets. Treat with caution and keep out of reach of pets as a precautionary measure.

What USDA hardiness zone does amboina kauri grow in?

Amboina Kauri is rated for USDA zone 10-12 and RHS hardiness H1c. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Amboina Kauri deep-dive guides

Every aspect of amboina kauri care, each with its own calibrated guide:

Featured in these plant shortlists

Amboina Kauri qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Amboina Kauri is also known as Dammar Kauri, Amboyna Kauri, and Manila Copal.