Blechnum obtusifolium

A South American Blechnum listed from Peru, Bolivia, Paraguay and Uruguay. Records are few and climatically scattered. Grow it as a terrestrial fern of moist ground: bright shade, steady moisture, and mild-to-warm temperatures with cooler winters.

At home, aim for

Day IntermediateTargets 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

No habitat notes were found. Lowland Blechnum of this region typically grow on damp banks, stream edges and wet grassland margins, and this profile assumes the same.

Records are from lowland Paraguay (about 90–250 m) and one Andean site at 2150 m.

PeruBoliviaParaguayUruguay

🔒 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.