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Species library › Asplenium › Asplenium insulare
Ferns Partly documented

Asplenium insulare

A spleenwort described by Carmichael in 1818 from the South Atlantic, and recorded from Tristan da Cunha, part of the St Helena, Ascension and Tristan da Cunha territory. The climate is cool, windy and humid, with little difference between day and night. Very little is published about it.

At home, aim for
Day Cool-growingTargets 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

Probably grows among rocks, in wet fern-bush and on sheltered banks on the island, like other Tristan ferns. Treat this as an inference.

Records range from 175 to 475 m, with a median of 350 m (8 records).

Tristan da Cunha

🔒 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.