Japanese aralia (Fatsia japonica) care

Trees · straightforward to keep

Japanese aralia (Fatsia japonica) wants medium indirect light; cool and shady suits it. Water it weekly. Keep evenly damp through spring and summer, drier in winter. Wilting leaves recover, but the leaf edges brown permanently. Pot it in loam-based compost, moisture-retentive. Balanced feed monthly in spring and summer, and repot every 1.5 years. Humidity: above 50%. Mildly toxic to cats and dogs — causes vomiting if chewed.

Japanese aralia: big glossy hand-shaped leaves on a shrubby plant that is hardy outdoors in mild climates. Indoors it wants a cool, bright, shaded spot — a hallway or a cold porch suits it far better than a heated living room, which is the opposite of most of this list.

Quick facts

Water: Water weekly. Keep evenly damp through spring and summer, drier in winter. Wilting leaves recover, but the leaf edges brown permanently.
Light: Medium indirect light; cool and shady suits it.
Humidity: Above 50%.
Soil: Loam-based compost, moisture-retentive.
Feeding: Balanced feed monthly in spring and summer.
Repotting: Repot every 1.5 years.
Toxic to pets: Mildly toxic to cats and dogs — causes vomiting if chewed.
Difficulty: Straightforward.
Mature size: 1–2 m indoors; leaves 20–40 cm across.
Native to: Southern Japan, South Korea and Taiwan.

Watering a Japanese aralia

Water weekly. Keep evenly damp through spring and summer, drier in winter. Wilting leaves recover, but the leaf edges brown permanently.

That cadence is the one PlantParlour sets for this species when you name it, and it is deliberately on the cautious side — a plant that asks a day early is safer than one that asks a day late. Log each watering and the reminder moves with the plant rather than with the calendar.

Light

Medium indirect light and, unusually, a cool room. Fatsia is hardy outdoors in mild climates and struggles in a hot dry lounge more than in a chilly hallway.

Humidity and temperature

Above 50%. Central heating in winter is what turns a comfortable room into a dry one, and it is the usual reason an established plant suddenly browns at the edges or picks up spider mites.

Soil and potting

A loam-based compost that holds some water. Fatsia is not a plant that wants to dry out.

Feeding

Balanced feed monthly in spring and summer. Stop feeding in autumn and start again when you see new growth in spring — feeding a plant that isn't growing just builds up salts in the pot.

Repotting

Repot every 1.5 years. Every second spring. It grows fast and gets large; prune in spring to keep it in bounds.

Common problems

Yellow leaves with brown edges
Too warm and too dry.

Fix: Move it somewhere cooler, raise humidity, keep the compost damp.
Spider mites in a warm room
Dry heat.

Fix: Shower the plant and treat weekly; a cooler spot is the real cure.
Pale washed-out leaves
Too much direct sun.

Fix: Move it into shade.

Propagation

Stem cuttings in spring, or air layering for a tall specimen.

A cutting taken in PlantParlour keeps its link to the plant it came from, so a propagation years later still traces back to the mother plant — which is the point if you ever sell or trade it.

Toxicity and safety

Mildly toxic to cats and dogs — causes vomiting if chewed.

Questions people ask

How often should you water a Japanese aralia?

Water weekly as a starting point — that is the cadence PlantParlour sets for Fatsia japonica. Keep evenly damp through spring and summer, drier in winter. Wilting leaves recover, but the leaf edges brown permanently. Light, pot size and the time of year all move that number, so treat it as a reminder to go and check rather than a rule.

How much light does a Japanese aralia need?