Drosera humbertii

A rare Madagascan sundew of the high mountains, known from few collections at about 1400–2100 m on Marojejy and Ankaratra. It lives in a cool, constantly humid climate with heavy rain most of the year and no real dry season. Almost nothing is published about its ecology, so conditions here come from the measured climate and from montane Drosera in general.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

No rest periodGrows in the ground

Where it grows wild

Likely grows in wet, open montane heath, rock seeps or boggy ground on high massifs; habitat detail is not published in accessible sources.

Recorded at 1425–2133 m, median 2017 m.

Madagascar (northern and central highlands)

🔒 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.