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Species library › Blechnum › Blechnum ambiguum
Ferns Partly documented

Blechnum ambiguum

A small fern of eastern Australia (now Parablechnum ambiguum) that grows on constantly wet rock, often beside waterfalls, especially around Sydney. Grow it cool to mild, shaded and permanently moist.

Blechnum ambiguum
Photo: Poyt448 Peter Woodard, 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 ShadeDLI and PPFD in Plantistry
No rest periodGrows on rock (lithophyte)

Where it grows wild

Wet rock faces, frequently in waterfall spray, in sheltered sandstone gullies.

Records 5–1230 m, median 659 m.

New South WalesQueensland

🔒 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.