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Species library › Blechnum › Blechnum fluviatile
Ferns Well documented

Blechnum fluviatile

A cool-temperate rosette fern of shaded stream banks in New Zealand and south-eastern Australia, with ladder-like sterile fronds and upright dark fertile fronds. It needs constant moisture, deep shade and cool temperatures; warm, dry rooms kill it.

Blechnum fluviatile
Photo: Cordyceps, Public domain, via Wikimedia Commons
At home, aim for
Day Cool-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Very humid airBand in Plantistry
Light Deep shadeDLI and PPFD in Plantistry
No rest periodGrows in the ground

Where it grows wild

Damp, shady stream banks and boggy ground in mixed broadleaf and podocarp forest, in acidic soil.

Recorded from sea level to 3,300 m, median 520 m; the high records come from New Guinea mountains.

New ZealandTasmaniaVictoriaNew South WalesAustralian Capital TerritoryPapua New GuineaSabahSulawesiSumatra

🔒 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 Public domain licence, unmodified.