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Species library › Asplenium › Asplenium onopteris
Ferns Well documented

Asplenium onopteris

Acute-leaved spleenwort

A small evergreen spleenwort of the Mediterranean and Macaronesia, with glossy, finely divided, sharply pointed fronds. It grows on shady rocky banks, walls and the floor of acid oak and chestnut woods. It grows mainly in the cool, wet season and rests through the dry summer, so it wants a cool, bright-shade spot rather than a warm terrarium.

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 on rock (lithophyte)

Where it grows wild

Grows on rocky slopes, shaded banks, old walls and the floor of evergreen and deciduous woodland, especially cork-oak, holm-oak and chestnut woods on acid, siliceous rock. It shelters among rocks and tree roots, where soil stays cooler and moister than the open hillside.

Recorded at 68–1116 m, median 349 m (28 records), mostly lowland and hill country.

Mediterranean Europe (Iberia, France, Italy, Balkans, Greece, Türkiye)North Africa (Morocco to Libya)Macaronesia (Canaries, Madeira, Azores)Levant, Cyprus and northern IranWestern Ireland (isolated)

🔒 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.