Arrowhead plant (nephthytis) care

Light

Arrowhead plant thrives in bright indirect light — the conditions just back from a sunny window, with plenty of ambient brightness but rarely any direct rays on the leaves themselves. Bright indirect light brings out pink and variegated colours. Tolerates medium light at the cost of vibrancy. If you are not sure whether your spot is bright enough, a free phone lux-meter app at midday is the quickest way to check; aim for 800-1,500 lux.

Watering

Water arrowhead plant when the top 2-3 cm of soil is dry, every 7-10 days. The actual day count varies with pot size, light level, and the season — the finger test (or, better, lifting the pot to feel its weight) is more reliable than a calendar. Empty any drainage saucer after watering so the pot is never sitting in water. Likes consistent moisture but rots if soggy. Drooping leaves usually mean thirst.

Soil and pot

Arrowhead plant grows best in aroid mix. Two parts compost, one part orchid bark, one part perlite. A drainage hole is essential. 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

Arrowhead plant sits happiest at around 50-60% humidity and 18-27°C (65-80°F). Higher humidity produces larger glossier leaves. 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 arrowhead plant sparingly. Balanced liquid feed at half strength monthly from spring to early autumn. 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 arrowhead plant in the Growli community. Each is annotated with the most common cause so you know where to start.

• Yellow leaves — Usually overwatering; check that the soil is drying between watering.
• Faded variegation — Move to brighter indirect light.
• Leggy growth — Insufficient light or no support; provide a moss pole to encourage mature leaves.
• Brown crispy edges — Low humidity or tap-water fluoride.

Propagation

Stem cuttings with at least one node root in water in 2-3 weeks. 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

Arrowhead plant is mildly toxic to pets. ASPCA lists Syngonium podophyllum as toxic to cats and dogs due to insoluble calcium oxalates. Chewing causes oral irritation, drooling, and rare vomiting. 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.

Arrowhead plant deep-dive guides

Every aspect of arrowhead plant care, each with its own calibrated guide:

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

Related guides

Arrowhead plant is also known as nephthytis, goosefoot plant, and American evergreen.

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• All 200 plant care guides in the Growli library