Alocasia robusta

One of the largest aroids in the world: a trunkless rosette herb endemic to Borneo, with leaf blades up to 6 m long and nearly 3 m wide on stalks up to 3.7 m, and a dark purple-black spathe. It grows in hot, wet lowland forest and needs constant warmth, high humidity, abundant water and a great deal of space. Only a large tropical glasshouse can hold a mature plant.

At home, aim for

Day Warm-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

No rest periodGrows in the ground

Where it grows wild

Lowland rainforest in Borneo, typically in the understorey to forest edges, gaps and clearings, where a giant rosette can reach up into brighter light. The literature consulted gives no more specific habitat detail.

Recorded elevations are 65–260 m (5 records), and the measured sites are at 31–365 m: a lowland species.

Borneo

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates

✓ Humidity band, and how to hold it

✓ Light as DLI and PPFD for a grow light

✓ Wet and dry seasons, and whether to rest it

✓ Substrate and airflow

✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.