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Species library › Blechnum › Blechnum gregsonii
Ferns Partly documented

Blechnum gregsonii

A delicate fern of the Blue Mountains and Illawarra ranges of New South Wales, now usually placed in Parablechnum, with pendant fronds 30–80 cm long. It grows in cool rainforest pockets, often on wet rock near waterfalls, and needs constant moisture and shade.

Blechnum gregsonii
Photo: Poyt448 Peter Woodard, CC BY-SA 4.0, 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

Cool rainforest in sheltered gullies, often on damp rock faces and ledges near waterfalls, from a creeping rhizome with hanging fronds.

Recorded at 600–964 m, median 660 m.

New South Wales

🔒 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.