Syngonium, also called arrowhead vine, arrowhead plant or nephthytis, is one of the easiest aroids to keep indoors. Young plants are bushy, with arrow-shaped leaves; given time and something to climb, they turn into a vine whose leaves split into several leaflets. Syngonium plant care is simple: bright indirect light, regular watering in the growing season and less in winter, steady warmth, and pruning if you want to keep that compact arrowhead look.
Syngonium Care Snapshot
| Factor | Ideal | Avoid |
|---|---|---|
| Light | Bright, indirect light; variegated types need bright filtered light | Full sun (burns or bleaches leaves); deep shade |
| Temperature | Warm; minimum winter temperature 15 °C (59 °F) | Cold drafts and chilly windows |
| Humidity | Warm setting with high humidity is ideal; average rooms are tolerated | Very dry, heated air |
| Compost | Houseplant compost in a pot with drainage | Waterlogged soil |
| Water | Freely in growth; more sparingly from fall to late winter | Soggy soil in winter |
| Feeding | Balanced liquid fertilizer every 3 to 4 weeks in growth | Feeding in winter |
| Pets | Keep out of reach | Toxic to cats, dogs and horses |
Sources: RHS Syngonium podophyllum plant details; Missouri Botanical Garden Plant Finder; NC State Extension Plant Toolbox; ASPCA.
What Is a Syngonium?
Syngonium podophyllum is an evergreen climbing aroid. Missouri Botanical Garden gives its native range as Mexico, Central America and northern South America, and NC State lists it as climbing to about 6 feet. Its leaves change with age, which is why one plant can look so different from another:
- Juvenile leaves (to about 5.5 inches) are oval with heart-shaped bases, sometimes with silver variegation (MOBOT).
- Arrow-shaped leaves follow as the plant matures, the look most people buy it for.
- Adult leaves on climbing stems become pedate, up to 14 inches long with 5 to 11 leaflets (MOBOT; the RHS also notes 5 to 11 leaflets).
The RHS describes it as an evergreen climber to about 2 m, compact when young, with arrow-shaped leaves veined and suffused with silvery-white, and gives it the Award of Garden Merit. Popular cultivars include ‘White Butterfly’ and the pink types; see our guides to Syngonium Pink Allusion and Syngonium albo.
Care Routine Through the Year
- Spring and summer: water freely and feed with a balanced liquid fertilizer every three or four weeks (RHS). This is the time to prune, repot and take cuttings.
- Fall and winter: water more sparingly (RHS, MOBOT) and stop feeding. Keep it above 15 °C (59 °F).
Bushy or climbing? NC State notes that young plants are shrubby and become vine-like with age, and that if you want to keep the arrowhead foliage, you should cut off the climbing stems as they begin to develop. The RHS says plants can be cut back in height in spring where necessary. If you prefer a vine, give it a moss pole or let it trail from a basket; the RHS notes it can be supported or allowed to trail.
Light, Temperature and Humidity
Light. MOBOT says syngonium prefers bright indirect light and should be protected from direct sun. NC State warns that full sun tends to burn or bleach the foliage. The RHS adds a useful detail: green-leaved cultivars need bright indirect light, while variegated cultivars need bright filtered light to keep their color. A spot near an east window, or back from a brighter window, suits most plants. In low light, stems stretch and new leaves come out smaller.
Temperature. The RHS gives a minimum winter temperature of 15 °C (59 °F). Keep it away from cold windows and drafty doors in winter.
Humidity. NC State describes the ideal location as warm with high humidity, but syngonium copes with average indoor air better than many aroids. If leaf edges turn brown and crispy in heated winter air, group plants or use a humidifier.
Soil, Watering and Feeding
Compost. The RHS simply recommends houseplant compost. Syngonium does not need a chunky orchid-bark mix, although a little perlite helps drainage. Always use a pot with drainage holes.
Watering. Water thoroughly when the top inch or so of compost feels dry, let the excess drain, and empty the saucer. The RHS says to water freely when in growth and more sparingly in winter; MOBOT says to reduce watering from fall to late winter. Wilting with dry soil means it is thirsty; yellowing lower leaves with wet soil means it is getting too much. See our overwatered vs underwatered guide.
Feeding. A balanced liquid fertilizer every three or four weeks while it is growing (RHS) is enough. Too much fertilizer builds up salts, showing as brown tips or a white crust on the soil.
Repotting. NC State notes that repotting every few years and trimming the root system keeps the plant manageable. Repot in spring, moving up one pot size when roots fill the pot.
Propagating Syngonium
NC State lists division, layering and stem cuttings. The RHS recommends softwood stem-tip cuttings and leaf-bud cuttings in summer, with bottom heat.
- Cut a stem with at least one node (the slight bump where a leaf joins the stem) and one or two leaves, using clean scissors. Wear gloves: the RHS notes the sap irritates skin and eyes.
- Remove any leaf that would sit below water or compost.
- Root it in water, moist compost or sphagnum moss in a warm, bright spot out of direct sun. Gentle bottom heat helps in cooler rooms, as the RHS suggests.
- Once it has a few healthy roots, pot it into houseplant compost and keep it lightly moist while it settles.
Plant several rooted cuttings together for a fuller pot.
Is Syngonium Toxic to Pets?
Toxic to cats, dogs and horses
The ASPCA lists nephthytis (arrowhead vine, Syngonium podophyllum) as toxic to dogs, cats and horses because of insoluble calcium oxalates. Clinical signs include oral irritation, pain and swelling of the mouth, tongue and lips, excessive drooling, vomiting (not in horses) and difficulty swallowing. NC State rates it medium severity and notes it can also cause contact dermatitis, and the RHS advises wearing gloves when handling it. If a pet chews it, call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.
Keep it on a high shelf or in a hanging basket out of reach, or choose from our cat-safe plants list.
Common Problems and Diseases
| Symptom | Likely cause | Fix |
|---|---|---|
| Yellow lower leaves, wet compost | Overwatering, especially in winter | Let the top inch dry; water less in winter |
| Long, bare stems, small leaves | Too little light, or the plant is starting to vine | Brighter indirect light; cut back in spring |
| Pale, bleached or scorched leaves | Direct sun | Move out of full sun |
| Brown, crispy edges | Dry air or fertilizer salts | Raise humidity; flush the pot; feed less |
| Very dark green spots turning to foul-smelling soft rot | Bacterial blight and stem rot | Discard infected plants; keep leaves dry (Penn State) |
| Translucent spots at leaf edges with bright yellow halos | Bacterial leaf spot | Remove infected plants; avoid overhead watering (Penn State) |
| Tan to dark brown spots with concentric rings | Myrothecium leaf spot | Avoid excess nitrogen; protect leaves from wounding (Penn State) |
| Cottony clusters, fine webbing, sticky leaves | Mealybugs, spider mites, aphids, scale (MOBOT, NC State) | Isolate and treat early |
Sources: Penn State Extension “Syngonium Diseases” (Moorman, 2023); Missouri Botanical Garden; NC State Extension.
Penn State Extension stresses buying disease-free plants and watering in a way that keeps the leaf surfaces dry, since the bacterial diseases spread with splashing water. For pests, see our guides to mealybugs and spider mites.
For other trailing aroids, see our guides to Scindapsus pictus. It is one of our picks in our guide to plants that grow in water.
Frequently Asked Questions
How do you care for a syngonium plant?
Give it bright, indirect light, houseplant compost, generous watering in the growing season and less in winter, a minimum of about 15 °C, and a balanced liquid feed every three or four weeks while it grows, as the RHS recommends.
Does syngonium need direct sunlight?
No. Missouri Botanical Garden says it prefers bright indirect light and should be protected from direct sun, and NC State warns that full sun burns or bleaches the leaves.
How do I keep my syngonium bushy?
Cut off the climbing stems as they develop, as NC State suggests, and prune in spring. Cuttings can be rooted and planted back into the same pot for a fuller plant.
Why are my syngonium leaves turning yellow?
Most often overwatering, especially in winter when the plant needs less. An occasional old lower leaf yellowing is normal. Check the compost before watering.
Is syngonium toxic to cats?
Yes. The ASPCA lists arrowhead vine (nephthytis) as toxic to cats, dogs and horses because of insoluble calcium oxalates.
Why are my syngonium leaves changing shape?
It is maturing. Missouri Botanical Garden explains that juvenile leaves are heart-shaped, become arrow-shaped, and on older climbing stems turn into leaves with 5 to 11 leaflets.