Asplenium dolosum

Asplenium ×dolosum Milde is the sterile hybrid between black spleenwort (A. adiantum-nigrum) and maidenhair spleenwort (A. trichomanes). It turns up only where both parents grow together, in rock crevices and old walls in western and central Europe. The GBIF records are from the Massif Central in France. Grow it like its parents: a hardy crevice fern that goes cool in 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 on rock (lithophyte)

Where it grows wild

The records give only localities. Its parents share shaded to half-sunny crevices in siliceous rock, rocky banks and mortared walls, and the hybrid grows in these mixed colonies.

Measured sites lie at about 370–910 m.

BelgiumFranceItalySwitzerlandWest Himalaya

🔒 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.