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Alocasia Amazonica
Alocasia x amazonica
Care level: Moderate
Alocasia x amazonica is a man-made hybrid, not a naturally occurring species, first developed by crossing Alocasia plants to produce its dramatic dark, glossy, arrow-shaped leaves with contrasting white-green veins and scalloped edges, a striking combination that has made it one of the most photographed aroids on social media despite its reputation for being fussy indoors.
Bright, indirect light; direct sun scorches the glossy patterned leaves.
Water
Keep soil evenly moist, watering when the top 2-3cm is dry, and avoid letting it dry out fully.
Humidity
Needs high humidity (60%+) to prevent crispy leaf edges.
Soil
Loose, well-draining aroid mix with good moisture retention.
Temperature
Warm. Do not let it drop below 16°C.
Size
30-120cm tall and 30-60cm wide.
Growth speed
Medium
Best position
north / north-east-facing windowanywhere up to about 1 m from the window
east-facing windowabout 1 m from the window or further back
west-facing windowabout 2 m from the window or further back
Watch for strong direct sun at east / west windows.
See every window directionHide window directions
Best position
right by the window
about 1 m
about 2 m
about 4 m
4 m or more
north
works well✓
works well✓
too dark○
too dark○
too dark○
north-east
works well✓
works well✓
too dark○
too dark○
too dark○
east
just about~
works well✓
works well✓
too dark○
too dark○
south-east
too much direct sun☼
just about~
just about~
too dark○
too dark○
south
too much direct sun☼
too much direct sun☼
too much direct sun☼
too dark○
too dark○
south-west
too much direct sun☼
too much direct sun☼
just about~
too dark○
too dark○
west
too much direct sun☼
too much direct sun☼
works well✓
too dark○
too dark○
north-west
too much direct sun☼
just about~
too dark○
too dark○
too dark○
✓works well~just about○too dark☼too much direct sun
A rough guide based on window direction and typical daylight through the year. Window size, curtains and whatever stands outside matter just as much.
!Toxic to pets
Toxic to cats and dogs if eaten.
Chewing it can irritate the mouth, causing drooling and trouble swallowing.
If your pet has eaten some, contact your vet.
Source: ASPCA
Common mistake
Treating this plant like a typical drought-tolerant houseplant is a common error; unlike many aroids it dislikes drying out completely and also dislikes soggy soil, so the real skill is keeping it evenly, lightly moist at all times rather than following a wet-then-dry cycle.
Care by Season
Spring
Resume feeding every 4 weeks as new leaves unfurl.
Summer
Water regularly and boost humidity with a pebble tray or humidifier.
Autumn
Reduce watering slightly and stop fertilizing as growth slows.
Winter
Water sparingly and expect possible dormancy with some leaf loss; keep the tuber slightly moist.
Growing & Maintenance
Soil and pot
A loose aroid mix that drains well but holds some moisture, in a pot with drainage holes.
Fertilising
Feed every four weeks while new leaves are unfurling in spring and summer. Stop in autumn.
Pruning
Remove yellowing old leaves by cutting the stalk at the base.
Propagation
By dividing the offsets from the main plant when you repot.
Pests & Diseases
Common problems
All the leaves drop
Most likely cause: Dormancy, which is common in lower light or cooler months.
What to do: Keep the tuber slightly moist and warm. New leaves return when conditions improve.
Brown, crispy leaf tips and edges
Most likely cause: Low humidity, or compost that has been allowed to dry out.
What to do: Keep the humidity at 60% or more and the compost evenly moist.
Scorched patches
Most likely cause: Direct sunlight.
What to do: Move it to bright, indirect light.
Yellow leaves and a soft stem base
Most likely cause: Overwatering, which leads to root rot and stem rot.
What to do: Let the top 2-3cm dry before watering again, trim rotten roots and repot in fresh mix.
Drooping stems
Most likely cause: Dry compost, or a room colder than 16°C.
What to do: Water if the compost is dry and move the plant somewhere warmer.
Pests & Diseases
Spider mites
Signs: Fine webbing and stippled pale patches on leaves.
Treatment: Raise humidity, rinse foliage, and apply insecticidal soap if needed. Check the undersides of the leaves and the crevices where the leaf stem meets the main stalk.
Mealybugs
Signs: White cottony clumps along stems and leaf joints.
Treatment: Dab with an alcohol-soaked swab and repeat weekly. Check the undersides of the leaves and the crevices where the leaf stem meets the main stalk.
Root rot
Signs: Mushy, blackened roots and wilting despite moist soil.
Treatment: Remove from wet soil, trim rotten roots, and repot in fresh, well-draining mix.
FAQ
Why did all the leaves on my Alocasia Amazonica suddenly fall off?
This species commonly goes into a dormant rest period, especially in lower light or cooler months, during which it can drop most or all of its leaves; as long as the tuber stays firm, keep the soil barely moist and new growth usually returns in spring.
Why are the leaf tips and edges on my Alocasia Amazonica turning brown?
Crispy brown edges usually mean the humidity is too low or the plant has been allowed to dry out between waterings; raising humidity and keeping the soil consistently and lightly moist typically stops new leaves from browning.
Is Alocasia Amazonica toxic to cats and dogs?
Yes, Alocasia Amazonica is toxic to cats and dogs. Chewing it irritates the mouth. Keep it out of reach of pets.
How often should I water Alocasia Amazonica?
When the top 2-3cm of compost is dry. Keep the compost evenly moist, never soggy and never fully dry. Water less in winter.
How big does Alocasia Amazonica get?
Between 30 and 120cm tall and 30 to 60cm wide, depending on the variety. Compact forms such as 'Polly' stay at the lower end.
How do I propagate Alocasia Amazonica?
By division. Separate the offsets from the mother plant when you repot and pot them up on their own.
