Blechnum longipinna

A Madagascan blechnoid fern described by Rakotondrainibe, now usually placed in Lomariocycas as L. longipinna. GBIF records put it in humid evergreen mid-elevation forest of northern and eastern Madagascar at roughly 900 to 1500 m, sometimes beside streams. Grow it like other montane rainforest ferns: shade, steady warmth without heat, constant moisture and high humidity.

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

Recorded in dense humid evergreen forest at middle elevations, including ridge forest with bamboo and stream margins, in reserves such as Montagne d'Ambre, Zahamena and Makira.

Herbarium labels give about 900 to 1500 m, most often 1100 to 1450 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.