Begonia antaisaka

Begonia antaisaka is a rarely collected begonia from south-eastern Madagascar, named after the Antaisaka people of that coast. It was found on wet rocks in humid evergreen forest on granite and lateritic clay in the Mandrare valley, at 300–500 m, and was photographed at the Col de Fitana in 2022. Grow it as a shaded, humid rock-dwelling begonia with a mild winter night drop.

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 on rock (lithophyte)

Where it grows wild

The 1947 collection grew on wet rocks in rain forest on lateritic clay and granite on a mountain south of Tanandava, in the valley of the Mandrare, a tributary of the Manampanihy. The 2022 record is from the Col de Fitana in Anosy.

The specimens are labelled 300–500 m; the measured sites are at about 400 and 555 m.

Madagascar

🔒 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.