Arrow Arum (Tuckahoe) care

Light

In the wild arrow arum 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. Grows well in full sun to moderate shade; in very deep shade flowering and berry production are reduced, but the foliage remains vigorous — part shade suits container ponds in hot climates. 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 permanent shallow flooding — plant in up to 15 cm of water for arrow arum, 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. Place in standing water 5–15 cm (2–6 in) deep, or in perpetually waterlogged soil at pond margins; it will not tolerate any period of dryness and is ideal for wildlife ponds and rain gardens.

Soil and pot

Arrow Arum grows best in heavy clay loam, pond mud, or aquatic compost. Plant directly into pond silt or in baskets of heavy loam or specialist aquatic compost; avoid peat-based or free-draining mixes that dry out — root anchorage in firm substrate is important. 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

Arrow Arum sits happiest at around High (65–100%) humidity and -20°C to 32°C (-4°F to 90°F). A natural inhabitant of marshes and swamp edges; ambient outdoor humidity in pond-side conditions is usually ideal — no supplemental misting required when grown in the ground. If you keep the room above 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 arrow arum sparingly. Apply a slow-release aquatic fertiliser tablet pushed into the root zone once in spring; avoid releasing excess nutrients into the water column which can cause algal blooms. 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 arrow arum in the Growli community. Each is annotated with the most common cause so you know where to start.

• Aphid Colonies on New Growth — Aphids frequently colonise the unfurling young leaves and flower spathes in spring; remove by hand or apply insecticidal soap, avoiding contamination of pond water with chemical treatments.
• Rhizome Rot in Stagnant Water — In poorly circulated, overly warm water during summer, rhizomes can succumb to bacterial or fungal rot; improve water movement and thin congested clumps every 2–3 years to restore vigour.

Propagation

Divide established clumps in spring or early summer, ensuring each division has at least one growing point and a good root section; can also be grown from seed sown in wet compost kept submerged. 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

Arrow Arum is toxic to pets. All parts of Peltandra virginica contain insoluble calcium oxalate crystals (raphides), a hallmark of the Araceae family. Ingestion causes intense oral irritation, burning and swelling of the mouth, tongue, and throat, excessive drooling, vomiting, and difficulty swallowing in both cats and dogs. Keep pets away from all plant parts including the berries, which contain higher concentrations. Contact a vet immediately if ingestion is suspected. 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.

Arrow Arum deep-dive guides

Every aspect of arrow arum care, each with its own calibrated guide:

• Common arrow arum problems & fixes
• Arrow Arum watering schedule
• Arrow Arum light requirements
• Best soil mix for arrow arum
• Arrow Arum fertilizing guide
• When to repot arrow arum
• How to propagate arrow arum
• How to prune arrow arum
• What's eating my arrow arum?
• Arrow Arum growth rate & size
• Arrow Arum cold hardiness
• Arrow Arum temperature & humidity
• Is arrow arum toxic to cats & dogs?
• Is arrow arum toxic to cats?
• Is arrow arum toxic to dogs?
• Getting arrow arum to bloom

Featured in these plant shortlists

Arrow Arum 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 humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• 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

Arrow Arum is also known as Arrow Arum, Green Arrow Arum, Tuckahoe, and Virginia Peltandra.

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• All 10153 plant care guides in the Growli library