Blechnum fraseri

The miniature tree fern: a small fern with a slender trunk up to about a metre, spreading by underground runners into colonies. Almost all wild records are from northern New Zealand lowland forest, so grow it as a cool, humid, shaded temperate-subtropical fern.

At home, aim for

Day Cool-growingTargets 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

Grows in the understory of lowland and lower montane forest, often on banks and along tracks in kauri and podocarp-broadleaf forest; the Malesian populations are on tropical mountains.

Mostly 12–600 m in New Zealand (median 335 m); the tropical Asian populations reach far higher, to about 3,750 m in New Guinea.

New ZealandTaiwanPeninsular MalaysiaSumatraBorneo (Sabah)SulawesiPhilippinesMalukuNew GuineaBismarck Archipelago

🔒 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. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.