Houseplant · Araceae
Xanadu Philodendron
Philodendron xanadu
Give it bright, indirect light and steady moisture, and this self-heading philodendron anchors a corner with quiet, sculptural ease.
Bright indirect
65–75°F · 18–24°C
USDA 9–11
2–5 ft · 0.6–1.5 m
Overview
The Xanadu philodendron is a compact, self-heading houseplant with deeply lobed, glossy green leaves that lend a room an understated, gallery-calm presence. It belongs to the arum family and descends from Philodendron bipinnatifidum, though it holds its place as a patented selection. Indoors it keeps a tidy, rounded silhouette on its own, which makes it an easy partner for a pared-back, considered interior where clutter has no place.
Part of its appeal is how little it asks of a busy home. It favors bright indirect light yet takes gracefully to the shadier corners that defeat more demanding plants, and a missed watering during a hectic week leaves it unbothered. Set it in a warm room beside a chair or at the turn of a hallway, and it slips into the daily routine without fuss.
Scale is worth planning for, and it is part of the charm. A mature plant spreads 3 to 6 feet (91 to 183 cm) across, so it earns a place on the floor rather than a crowded shelf. Give it that room and it becomes a grounding, architectural anchor that shapes the whole corner around it.
Care
The short version: set it in bright indirect light, keep the soil evenly moist but never soggy, and hold the room at a comfortable 65°F to 75°F (18°C to 24°C). Feed monthly through spring and summer, and give it room on the floor to spread.
Light
Place it in bright, indirect light for the fullest, most composed shape. It takes partial shade and even deep shade better than most houseplants, which opens up the dim corners other plants refuse, though in true gloom the leaves spread apart and the form turns leggy. Keep it clear of harsh midday sun, which scorches the foliage.
Water
Keep the soil evenly moist through active growth, letting the surface dry just slightly between waterings so the routine stays forgiving. Its moderate drought tolerance means a brief dry spell during a busy stretch does no harm, while standing water is another matter. Overwatering is the most common reason the leaves turn yellow.
Soil
Set it in a rich, humus-heavy mix that holds moisture yet drains freely. It is unfussy about texture and grows in sand, loam, or clay, and it accepts anything from acidic to slightly alkaline, so almost any good potting choice suits it. The one thing it will not forgive is a pot that stays waterlogged.
Temperature
Indoors it prefers a steady 65°F to 75°F (18°C to 24°C), the comfortable warmth most living rooms already hold. It has no frost tolerance, so keep it away from cold drafts and chilly windowsills through winter.
Humidity
Average household humidity suits it, so there is no number to chase and no gadget to buy. A little extra moisture in the air keeps the foliage looking its best and helps hold spider mites at bay, since those pests favor hot, dry rooms.
Feeding
Feed monthly with a balanced liquid houseplant fertilizer through spring and summer, while the plant is putting on new growth. Ease off through fall and winter as growth slows. Steady, light feeding serves it better than the occasional heavy dose.
Pruning
This is a low-maintenance plant that needs little shaping thanks to its self-heading habit, which keeps it looking curated with almost no effort. Simply lift away old, yellowed, or damaged leaves at the base as they appear. Wear gloves or wash up afterward, since cut stems leak an irritating sap.
Repotting
Repot every 1 to 2 years, or once you see roots pushing through the drainage holes, growth slowing, or water running straight through the pot. Move it up to the next pot size with fresh mix in spring, and choose a vessel that suits the room while you are at it. The wide-spreading clump appreciates the extra root room.
Size & spacing
A mature plant reaches 2 to 5 feet (61 to 152 cm) tall and spreads a generous 3 to 6 feet (91 to 183 cm) across. Give it floor space and room for air to move around the clump so it reads as an anchor rather than a crowded afterthought on a shelf.
Troubleshooting
Most of what unsettles this plant begins at the roots or shows first on the leaves, where it also shows in a room. Overwatering is the usual cause, with a few familiar houseplant pests behind it. Match what you notice below and act early, before the display slips.
Yellowing that begins low and rises through the clump
When the lower leaves fade to yellow and the color drifts upward, the cause is almost always overwatering rather than any lack of feeding. The roots have been left sitting in a sodden mix with nowhere to drain. Let the surface dry before the next watering, choose a pot that empties freely, and lift away the tired leaves at the base to keep the clump looking composed.
Fix:
- Allow soil to dry slightly before next watering
- Ensure the pot and soil drain freely
- Remove badly yellowed leaves at the base
A speckled, bronzed cast with faint webbing
A dull, speckled bronzing across the foliage, threaded with fine webbing, is the mark of spider mites, which arrive when a room runs hot and dry. Turn a leaf to catch the tiny moving specks and the thin webs beneath. Rinse and wipe the foliage back to its usual sheen, treat with insecticidal soap or horticultural oil, and set the plant apart from its neighbors until the room is calm again.
Fix:
- Rinse foliage and wipe leaves clean
- Treat with insecticidal soap or horticultural oil
- Isolate the affected plant
Cottony tufts or brown bumps and a sticky sheen
Soft white cottony tufts betray mealybugs, while the small brown limpet-like bumps riding the stems are scale, and each leaves a sticky honeydew that dulls the display. Touch every insect with an alcohol-dipped swab to lift it away. Follow with insecticidal soap or horticultural oil, and return to the plant until no newcomers appear and it reads clean again.
Fix:
- Dab insects with an alcohol-moistened swab
- Apply insecticidal soap or horticultural oil
- Repeat treatments until clear
New growth losing its line to small insects
Soft-bodied aphids gather on the freshest leaves, and slender thrips leave a silvery haze where they feed, both spoiling the clean lines of new growth. A stream of water sends the aphids off, insecticidal soap settles the rest, and any growth beyond saving can simply be trimmed. Keep feeding light for a while, since a rush of soft new shoots is exactly the tender flush that invites them.
Fix:
- Rinse off aphids with a stream of water
- Treat with insecticidal soap
- Remove heavily infested growth
Dark spotting that interrupts the foliage
Separate brown spots, some encircled by a soft yellow ring, are the work of fungal leaf-spot that settles on foliage left damp. Still, humid air lets it move quickly across the clump. Lift away the marked leaves, open the plant so air moves freely around it, and water at the soil so the foliage stays dry and presentable.
Fix:
- Remove affected leaves
- Improve air circulation
- Avoid wetting foliage when watering
Toxicity
This is a toxic plant, so give it a considered spot in homes with pets, livestock, or children. Every part holds insoluble calcium oxalate crystals that burn the mouth and throat the moment they are chewed, bringing drooling, swelling, and trouble swallowing. No part is edible, and even the sap can irritate skin and eyes, so wash your hands after pruning.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Moderate
A single bite into a leaf frees sharp calcium oxalate crystals that sting a cat's mouth at once. Heavy drooling, pawing at the muzzle, vomiting, and trouble swallowing tend to follow, so place the plant well beyond a curious cat's favorite perch.
Dogs Moderate
Chewing sets off an intense burning of the lips and tongue, with drooling and retching close behind. Most dogs let go quickly, which usually keeps them from taking in much, but a high shelf or a closed room settles the matter.
Horses Toxic
The same crystals inflame a horse's mouth and throat, leaving it drooling and off its feed. Swelling of the tongue and lips can follow a mouthful, so keep the plant to indoor rooms a horse never reaches.
Rabbits Toxic
Those crystals irritate a rabbit's mouth and gut just as readily, so the foliage belongs somewhere a rabbit cannot browse. A rabbit in pain often stops eating, and that alone is cause for concern.
Livestock Toxic
Goats, sheep, and cattle that sample the leaves meet the same burning mouth and digestive upset. They tend to leave it be after the first stinging taste, though it is wiser still to keep it out of their space entirely.
Birds Caution
A bird that pecks the foliage can take on the same oral irritation and drooling from the crystals. Keep cages and perches well clear of the plant when arranging a room.
People Caution
No part of this plant is meant for the table. A chewed leaf burns the mouth and can swell the lips and tongue, and the sap stings skin and eyes, so a rinse of the hands after handling cut stems is a sensible habit.
Sap can irritate skin, eyes and mucous membranes; wash hands after pruning or handling cut stems
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
How to propagate
This philodendron is easy to multiply at home, whether you divide an established clump or root a cutting taken from the base, an inviting way to carry its look into another room.
DivisionEasy
Spring to summer · A few weeks to re-establish roots
For a second plant to place in another room, division is the graceful route, and the clumping, self-heading habit makes it effortless. Ease an established plant from its pot in spring or summer and part it into rooted sections, each carrying its own offsets. Given a few weeks, the divisions settle in and send out fresh roots.
Stem cuttingsModerate
Spring to summer · Several weeks to root
Rooting a stem cutting offers another quiet way to expand the collection, a method the Missouri Botanical Garden records alongside seed. Take a basal cutting that includes a node in spring or summer, then allow several weeks for it to root. Most plants on the shelf are tissue-cultured rather than grown this way, but the approach rewards a little patience at home.
Myths
Since its reclassification, Thaumatophyllum xanadu is the only correct name for Xanadu.
A 2018 study did move several Philodendron species into Thaumatophyllum, yet the matter is far from decided. Kew's Plants of the World Online still lists Philodendron xanadu as the accepted name and files Thaumatophyllum xanadu as a synonym, so the genus placement remains contested between authorities.
Xanadu is only a dwarf form of the split-leaf philodendron.
Far from a scaled-down stand-in, it is a selection entirely its own, trademarked XANADU and patented as 'Winterbourn' under US plant patent PP7030. It was raised from seed of Philodendron bipinnatifidum with unknown parentage, and Kew recognizes it as its own species rather than a shrunken selloum.