Species library › Begonia › Begonia giganticaulis
Begonias Partly documented

Begonia giganticaulis

The tallest begonia known in Asia: an evergreen, cane-like perennial up to about 4 m tall, with stems up to 12 cm thick at the base. It grows on forested stream banks and valley slopes in Mêdog, southern Tibet, at 450–1400 m. It belongs to section Platycentrum and is dioecious, so separate male and female plants are needed for seed. It wants a large, humid, warm-temperate to subtropical setting with a cooler, drier winter.

At home, aim for
Day IntermediateTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Ordinary room humidityBand in Plantistry
Light Dappled lightDLI and PPFD in Plantistry
Expects a seasonal restGrows in the ground

Where it grows wild

It grows on slopes under forest along streams and at the water's edge in river valleys. The type locality is on the Baimu Xiri River near Beibeng. Mêdog lies in the deep, humid Yarlung Tsangpo valley, a subtropical pocket sheltered by high mountains within otherwise alpine Tibet. The plant has thick, reddish-brown, white-spotted stems with swollen nodes up to 7 cm thick and branches heavily in the upper part.

450–1400 m. The dated type collections are at 1110–1320 m, and older paratypes at 700–1200 m.

Tibet (Xizang)

🔒 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.