Blechnum polypodioides

A small, widespread neotropical Blechnum, often listed as Blechnum asplenioides, that grows from Mexico and the Caribbean to Argentina. It usually colonises moist banks, road cuts and stream edges from the lowlands to about 2,500 m. It is easy-going: warm, humid, evenly moist conditions and bright shade suit it.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

No rest periodGrows in the ground

Where it grows wild

A terrestrial fern of wet, often disturbed ground: earth banks, trail and road cuts, ditches, stream margins and forest edges in humid forest. It often forms small colonies in open, semi-shaded spots.

Recorded from sea level to about 2,550 m, with a median of about 820 m. The sampled sites lie at 190–840 m.

MexicoCentral AmericaCaribbeanColombiaVenezuelaGuianasEcuadorPeruBoliviaBrazilParaguayNortheast Argentina

🔒 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.