Blechnum andinum

A high-Andean hard fern recorded between 2,500 and 4,200 m, mostly in Bolivia. It needs cold nights and cool days all year, which makes it difficult in a warm house but suitable for a cool greenhouse or a mild, frost-light garden.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

A terrestrial fern of the upper montane forest edge, elfin shrubland and páramo-like grassland, often among rocks and on banks. This is inferred from the elevations and the genus.

The recorded elevations run from 2,500 to 4,182 m, with a median of 3,100 m.

Bolivia (La Paz, Cochabamba)PeruBrazil (Minas Gerais, Rio de Janeiro)

🔒 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.