Begonia robusta

Begonia robusta is a large rhizomatous begonia of the cool montane forests of Sumatra, Java, Bali, the Lesser Sunda Islands and Sulawesi, growing at about 1,400-2,500 m, often near streams and in gorges. It needs cool, very humid, shady conditions, and does poorly in hot rooms.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light ShadeDLI and PPFD in Plantistry

No rest periodGrows in the ground

Where it grows wild

A terrestrial begonia of submontane and montane rainforest, often in gorges and along streams, under a canopy of about 10-25 m. Records come from volcanoes such as Gunung Halimun, Salak, Pangrango and Mt Lesung in Bali.

About 1,400-2,530 m in montane forest; some Javan submontane records may be a little lower.

SumatraJavaBaliLesser Sunda IslandsSulawesi

🔒 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. Photo from Wikimedia Commons, used under its Public domain licence, unmodified.