Blechnum wagnerianum

A little-known Hawaiian fern recorded from the wet uplands of Kauai around 1,200 m. Grow it like other Hawaiian wet-forest Blechnaceae: cool-mild temperatures, constant moisture, high humidity and shade.

At home, aim for

Day IntermediateTargets 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

Records come from about 1,200 m on Kauai, where the habitat is montane wet forest and bog margins; growth form and habit are inferred from Hawaiian relatives because species-specific details were not available.

Recorded at 1,198–1,215 m.

Hawaii (Kauai)

🔒 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.