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Species library › Blechnum › Blechnum deltoides
Ferns Well documented

Blechnum deltoides

A low, cool-climate hard fern of New Zealand and south-east Australia, now usually called Cranfillia deltoides (mountain hard fern, kiokio). It grows on steep shaded banks in podocarp, beech and manuka forest, so it wants cool, constantly moist, humid conditions and no heat.

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

Steep banks, cliff faces, road cuttings and occasionally streamsides in podocarp, beech, manuka and kanuka forest; sometimes a low epiphyte.

Recorded from 3 to 1,615 m, median 500 m; more common above 200 m.

New ZealandNorth IslandSouth IslandStewart IslandChatham IslandsTasmaniaVictoria

🔒 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.