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Species library › Blechnum › Blechnum patersonii
Ferns Well documented

Blechnum patersonii

The strap water fern, with undivided or lobed strap-like fronds, grows in wet, shaded rainforest gullies, often beside streams or on dripping rock faces. It needs shade, constant moisture and high humidity, and tolerates cool winters.

Blechnum patersonii
Photo: Raffi Kojian, CC BY-SA 3.0, via Wikimedia Commons
At home, aim for
Day Cool-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Humid airBand in Plantistry
Light Deep shadeDLI and PPFD in Plantistry
No rest periodGrows in the ground

Where it grows wild

Shaded, wet rainforest gullies, creek banks and seeping rock faces where the air stays saturated.

Lowland to montane; the single measured site is near sea level on the Illawarra escarpment.

QueenslandNew South WalesAustralian Capital TerritoryVictoriaTasmaniaLord Howe IslandSabahTahiti

🔒 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 3.0 licence, unmodified.