Anthurium faustomirandae (giant anthurium) care

Light

Bright but filtered. Anthurium faustomirandae burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Bright, indirect light fuels its large leaves and keeps petioles strong. It tolerates some direct morning sun once established, but intense midday sun scorches the broad blades; insufficient light leaves the heavy leaves weak and prone to flopping. 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 anthurium faustomirandae: when the top 3-4 cm of mix is dry, about every 6-9 days. 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. Water deeply to saturate the large rootball, let it drain fully, then allow the upper layer to dry before watering again. Its substantial roots want consistent moisture in summer but rot quickly in a soggy or poorly draining medium.

Soil and pot

Anthurium faustomirandae grows best in coarse, fast-draining aroid mix. Use a chunky blend of orchid bark, perlite, coarse coco, and some compost to support the thick roots with plenty of air and quick drainage. Given its size, a heavier-bottomed mix or pot helps with stability without sacrificing aeration. 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

Anthurium faustomirandae sits happiest at around 55-80% humidity and 18-29°C (65-84°F). Enjoys high humidity but is reasonably adaptable, growing well above about 50% in a bright room. Higher humidity produces larger, cleaner leaves; in dry air the giant blades can develop brown edges, so supplement with a humidifier where possible. If you keep the room above 18 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 anthurium faustomirandae sparingly. Because it builds large foliage, feed every 3-4 weeks in spring and summer with a balanced liquid fertiliser at half strength. Flush the pot periodically to prevent salt accumulation, and reduce feeding sharply over winter. 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 anthurium faustomirandae in the Growli community. Each is annotated with the most common cause so you know where to start.

• Floppy, weak petioles — Usually too little light for such large leaves; move to brighter indirect light to firm up the stalks.
• Brown leaf edges — Dry air or mineral buildup on the big blades; raise humidity and water with filtered water, flushing salts.
• Root rot — A waterlogged or compacted mix overwhelms the thick roots; use a coarse medium and let the surface dry between waterings.
• Tipping over — Top-heavy growth in a light pot; repot into a wide, heavy container to anchor the large crown.

Propagation

Propagate by division of basal offsets, each separated with its own roots and a growth point. Seed propagation is possible from fresh berries but slow; for home growers, dividing established clumps at repotting is the practical method. 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

Anthurium faustomirandae is toxic to pets. Toxic to cats and dogs. The ASPCA classifies Anthurium as toxic owing to insoluble calcium oxalate crystals. Ingestion causes immediate oral burning, intense irritation of the mouth and throat, drooling, oral swelling, vomiting, and difficulty swallowing. 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.

Anthurium faustomirandae deep-dive guides

Every aspect of anthurium faustomirandae care, each with its own calibrated guide:

• Anthurium faustomirandae watering schedule
• Anthurium faustomirandae light requirements
• Best soil mix for anthurium faustomirandae
• Anthurium faustomirandae fertilizing guide
• When to repot anthurium faustomirandae
• How to propagate anthurium faustomirandae
• Anthurium faustomirandae growth rate & size
• Anthurium faustomirandae cold hardiness
• Anthurium faustomirandae temperature & humidity
• Is anthurium faustomirandae toxic to cats & dogs?
• Is anthurium faustomirandae toxic to cats?
• Is anthurium faustomirandae toxic to dogs?

Featured in these plant shortlists

Anthurium faustomirandae qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Anthurium faustomirandae is also commonly called giant anthurium.

• Types of anthurium — varieties identified, with care and pet-safety
• Monstera care — light, water and common problems
• Pothos care — light, water and common problems
• Fiddle leaf fig care — light, water and common problems
• All 2464 plant care guides in the Growli library