Blechnum auriculatum

A tough terrestrial hard fern of southern Brazil, Uruguay, northeastern Argentina and the Sierras de Córdoba, with distinctive eared pinnae. It takes a cool winter and more light than most ferns, so grow it in bright shade with a cool winter and steady moisture.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

No rest periodGrows in the ground

Where it grows wild

Terrestrial in forest margins, stream banks, road cuts and rocky or grassy slopes, as for related South American Blechnum; it is common across its range.

Recorded at 0–1,677 m, median 406 m (168 records); the five climate sites lie higher, at 630–1,360 m.

Rio Grande do SulSanta CatarinaParanáUruguayArgentinaBolivia

🔒 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.