Growli

Plant care

Triangle Fig (triangle-leaf fig) care

Ficus triangularis

Also called triangle fig, triangle-leaf fig.

RHS H1bUSDA 10-12Toxic to petsIndoor Typically 0.6-1.5 m tall indoors

Watering rhythm

7-12days

When the top 3-5 cm of soil is dry, roughly every 7-12 days

Light

Bright indirect light (just back from a sunny window)

Soil

Well-draining houseplant mix

Humidity

40-60%

Temp

16-29°C

Pet safety

Toxic to pets

Mature size

Typically 0.6-1.5 m tall indoors

Care at a glance

Light

In the wild triangle fig grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Bright indirect light keeps growth compact and, in variegated forms, preserves the cream margins; a little gentle morning sun is tolerated. Too little light produces sparse, leggy growth, while harsh direct sun can scorch the leaves. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for when the top 3-5 cm of soil is dry, roughly every 7-12 days for triangle fig, 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. Water thoroughly and let it drain, allowing the top few centimetres to dry first. The thick leaves store some water, so it tolerates brief dryness better than thin-leaved figs; avoid soggy soil, which causes root rot, and reduce watering in winter.

Soil and pot

Triangle Fig grows best in well-draining houseplant mix. A free-draining mix of potting compost with perlite and bark or orchid mix. Drainage matters more than richness — soggy roots quickly rot. Slightly acidic to neutral pH suits it. 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

Triangle Fig sits happiest at around 40-60% humidity and 16-29°C (60-84°F). Handles average household humidity but does best with moderate moisture; very dry air may brown leaf tips. Group with other plants or run a humidifier in dry, heated rooms and keep it away from drafts and radiators. If you keep the room above 16 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 triangle fig sparingly. Feed every 2-4 weeks during spring and summer with a balanced liquid houseplant fertiliser at half strength; stop feeding in autumn and 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 triangle fig in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Leaf drop from stressLike other figs, it sheds leaves after sudden moves, cold drafts or erratic watering. Keep it in a stable, warm position with consistent care.
  • Loss of variegationIn variegated forms, low light fades the cream margins and reverts growth to green. Provide brighter indirect light to keep the contrast.
  • Overwatering and root rotThe thick leaves mask water needs, so it is easily overwatered. Let the top few centimetres dry, ensure free drainage, and ease off in winter.
  • Mealybugs and scaleSap-sucking pests hide on stems and leaf undersides, leaving sticky residue. Inspect regularly and treat with isopropyl alcohol on a swab or insecticidal soap.

Propagation

Propagate by stem-tip cuttings in spring or summer. Take a cutting with at least one node, rinse the sap, allow it to callus, and root in moist, well-draining mix or water in a warm, bright spot; variegated forms root more slowly. 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

Triangle Fig is toxic to pets. Toxic to cats and dogs. The ASPCA classifies Ficus as toxic, with toxic principles ficin (a proteolytic enzyme) and ficusin (psoralen) in the milky sap. Chewing the plant or contact with the sap can cause mouth and skin irritation, drooling, vomiting, diarrhoea and reduced appetite. Keep out of pets' reach. 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.

Triangle Fig care — frequently asked questions

What is the common name for Ficus triangularis?

Ficus triangularis is most commonly called Triangle Fig, but it is also known as triangle fig, triangle-leaf fig. The names refer to the same species, so care instructions for Triangle Fig apply identically to anything sold as triangle-leaf fig.

How much light does triangle fig need?

Triangle Fig grows best in bright indirect light (just back from a sunny window). Bright indirect light keeps growth compact and, in variegated forms, preserves the cream margins; a little gentle morning sun is tolerated. Too little light produces sparse, leggy growth, while harsh direct sun can scorch the leaves.

How often should I water triangle fig?

Water triangle fig when the top 3-5 cm of soil is dry, roughly every 7-12 days. Water thoroughly and let it drain, allowing the top few centimetres to dry first. The thick leaves store some water, so it tolerates brief dryness better than thin-leaved figs; avoid soggy soil, which causes root rot, and reduce watering in winter. 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 triangle fig toxic to cats and dogs?

Triangle Fig is toxic to pets. Toxic to cats and dogs. The ASPCA classifies Ficus as toxic, with toxic principles ficin (a proteolytic enzyme) and ficusin (psoralen) in the milky sap. Chewing the plant or contact with the sap can cause mouth and skin irritation, drooling, vomiting, diarrhoea and reduced appetite. Keep out of pets' reach.

What USDA hardiness zone does triangle fig grow in?

Triangle Fig is rated for USDA zone 10-12 (indoor in most US and UK homes) and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Triangle Fig deep-dive guides

Every aspect of triangle fig care, each with its own calibrated guide:

Featured in these plant shortlists

Triangle Fig 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

Triangle Fig is also commonly called triangle fig or triangle-leaf fig.