Growli

Plant care

Norfolk Island Pine (Star Pine) care

Araucaria heterophylla

Also called Star Pine, Triangle Tree, Living Christmas Tree.

RHS H2USDA 10-11Mildly toxic to petsIndoor 1-2 m indoors

Watering rhythm

7-10days

When the top 2-3 cm of soil is dry, roughly every 7-10 days in spring and summer

Light

Bright indirect light (just back from a sunny window)

Soil

Well-drained, slightly acidic sandy loam or peat-free multipurpose mix

Humidity

50-70%

Temp

15-24°C

Pet safety

Mildly toxic to pets

Mature size

1-2 m indoors

Care at a glance

Light

Norfolk Island Pine is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Thrives in bright indirect or gentle direct light indoors — a south- or east-facing window is ideal. Insufficient light causes the lower branches to drop and the tree to become leggy. Rotate regularly for even growth. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water norfolk island pine when the top 2-3 cm of soil is dry, roughly every 7-10 days in spring and summer. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Water thoroughly until it drains from the bottom, then allow the top layer to dry before watering again. Reduce frequency in winter. Overwatering causes root rot; underwatering causes needle drop and branch dieback.

Soil and pot

Norfolk Island Pine grows best in well-drained, slightly acidic sandy loam or peat-free multipurpose mix. Use a free-draining potting mix with added perlite (approx. 20%). A slightly acidic pH (5.5–6.5) is ideal. Ensure the pot has good drainage holes and never allow the plant to sit in standing water. 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

Norfolk Island Pine sits happiest at around 50-70% humidity and 15-24°C (60-75°F). Appreciates higher humidity than most homes provide. Mist foliage regularly, use a pebble tray with water, or run a humidifier nearby. Low humidity causes needle tips to brown and lower branches to shed. 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 norfolk island pine sparingly. Feed with a balanced liquid fertiliser at half strength once a month from spring through early autumn. Avoid fertilising in winter. Too much fertiliser causes salt build-up and root burn. 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 norfolk island pine in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Needle and branch dropUsually caused by low humidity, underwatering, or sudden temperature changes; stabilise conditions and increase humidity.
  • Root rotOverwatering in poorly drained soil; improve drainage and reduce watering frequency.
  • MealybugsWhite cottony clusters in leaf axils; remove with a cotton swab dipped in rubbing alcohol or treat with neem oil.
  • Leaning growthCaused by uneven light; rotate the pot a quarter turn weekly to promote straight, balanced growth.
  • Brown needle tipsUsually due to dry air or fluoride in tap water; increase humidity and switch to filtered or rainwater.

Companion plants

Norfolk Island Pine pairs well with Ficus elastica, Schefflera arboricola, Howea forsteriana, and Dracaena fragrans. 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

Best propagated from seed sown fresh; viability drops quickly so sow as soon as possible. Cuttings do not produce symmetrical trees. Only the terminal shoot produces a true upright tree. 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

Norfolk Island Pine is mildly toxic to pets. Not individually listed by the ASPCA as toxic, but Araucaria sap and foliage are reported to cause mild gastrointestinal upset and skin irritation in pets if ingested in large amounts. Keep away from cats and dogs as a precaution. 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.

Norfolk Island Pine care — frequently asked questions

What is the common name for Araucaria heterophylla?

Araucaria heterophylla is most commonly called Norfolk Island Pine, but it is also known as Star Pine, Triangle Tree, Living Christmas Tree. The names refer to the same species, so care instructions for Norfolk Island Pine apply identically to anything sold as Star Pine.

How much light does norfolk island pine need?

Norfolk Island Pine grows best in bright indirect light (just back from a sunny window). Thrives in bright indirect or gentle direct light indoors — a south- or east-facing window is ideal. Insufficient light causes the lower branches to drop and the tree to become leggy. Rotate regularly for even growth.

How often should I water norfolk island pine?

Water norfolk island pine when the top 2-3 cm of soil is dry, roughly every 7-10 days in spring and summer. Water thoroughly until it drains from the bottom, then allow the top layer to dry before watering again. Reduce frequency in winter. Overwatering causes root rot; underwatering causes needle drop and branch dieback. 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 norfolk island pine toxic to cats and dogs?

Norfolk Island Pine is mildly toxic to pets. Not individually listed by the ASPCA as toxic, but Araucaria sap and foliage are reported to cause mild gastrointestinal upset and skin irritation in pets if ingested in large amounts. Keep away from cats and dogs as a precaution.

What USDA hardiness zone does norfolk island pine grow in?

Norfolk Island Pine is rated for USDA zone 10-11 (indoor-only in most climates) and RHS hardiness H2. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Norfolk Island Pine deep-dive guides

Every aspect of norfolk island pine care, each with its own calibrated guide:

Featured in these plant shortlists

Norfolk Island Pine qualifies for 2 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Norfolk Island Pine is also known as Star Pine, Triangle Tree, and Living Christmas Tree.