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Species library › Blechnum › Blechnum finlaysonianum
Ferns Partly documented

Blechnum finlaysonianum

A stiff, upright ground fern of lowland Malesian forest, from the Andamans and Thailand through Malaysia, Borneo and the Philippines to New Guinea. It wants constant warmth, high humidity and shade, with no seasonal rest. Now often placed in Blechnopsis.

At home, aim for
Day Warm-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Humid airBand in Plantistry
Light Dappled lightDLI and PPFD in Plantistry
No rest periodGrows in the ground

Where it grows wild

Grows on the forest floor and along shaded streams, trails and forest edges in lowland rainforest and older secondary forest, with an erect rhizome and a crown of once-pinnate fronds.

Recorded from 3 to 1,700 m, median about 200 m; mainly lowland.

MalaysiaSingaporeBorneoSumatraBruneiPhilippinesNew GuineaThailand

🔒 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.