Blechnum triangularifolium

A New Zealand Blechnum, also treated as Parablechnum triangularifolium, common on lowland banks, coastal scrub and forest margins. It is a hardy, cool-temperate fern that tolerates fairly bright light and needs steady moisture with a cool winter.

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

Expects a seasonal restGrows in the ground

Where it grows wild

Grows on damp banks, roadside cuttings, streamsides and forest edges, mostly in the lowlands. It is often in the open or in light shade.

Recorded at 3–944 m, median 80 m.

North IslandSouth IslandChatham Islands

🔒 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 4.0 licence, unmodified.