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Species library › Blechnum › Blechnum cordatum
Ferns Partly documented

Blechnum cordatum

A large, coarse hard fern with leathery pinnate fronds and a short trunk-like rhizome, now often placed in Parablechnum. Kew's range is the Andes from Colombia to Bolivia and southeastern Brazil, mostly in montane forest around 2,000 m. It is mild and frost-tolerant, and is grown and naturalised in the British Isles.

Blechnum cordatum
Photo: Franz Xaver, CC BY-SA 3.0, via Wikimedia Commons
At home, aim for
Day Cool-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Ordinary room humidityBand in Plantistry
Light Bright, filtered lightDLI and PPFD in Plantistry
No rest periodGrows in the ground

Where it grows wild

A terrestrial fern of montane forest edges, clearings, stream banks and wet road cuts, where it often forms colonies.

Recorded from near sea level to 3,800 m, median 2,000 m.

ColombiaEcuadorPeruBoliviaBrazil (Southeast)

🔒 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. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.