Tree philodendron (split-leaf philodendron (large)) care

Light

Tree philodendron 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 with some morning direct sun. 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 tree philodendron 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 in soggy soil. Reduce in winter.

Soil and pot

Tree philodendron grows best in rich aroid mix. Compost with 20% perlite and orchid bark. 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

Tree philodendron sits happiest at around 50-60% humidity and 18-27°C (65-80°F). Higher humidity produces larger 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 tree philodendron sparingly. Balanced liquid feed at half strength monthly in growing season. 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 tree philodendron in the Growli community. Each is annotated with the most common cause so you know where to start.

• Yellow leaves — Overwatering or root-bound — check before watering more.
• Small new leaves — Insufficient light or under-feeding.
• Aerial roots everywhere — Normal; can be tucked into the pot or trimmed.
• Brown leaf tips — Low humidity or tap-water sensitivity.

Propagation

Stem cuttings from the growing tip or air layering for big specimens. 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

Tree philodendron is mildly toxic to pets. ASPCA lists Philodendron and Thaumatophyllum species as toxic to cats and dogs due to insoluble calcium oxalates. 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.

Tree philodendron deep-dive guides

Every aspect of tree philodendron care, each with its own calibrated guide:

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

Related guides

Tree philodendron is also known as lacy tree philodendron, split-leaf philodendron (large), and horsehead philodendron.

• Monstera care — light, water and common problems
• Pothos care — light, water and common problems
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• All 200 plant care guides in the Growli library