Panaeolus semiovatus

Egghead mottlegill

A large, pale, ringed mottlegill that grows directly on horse and cow dung in pastures across the temperate world. It is one of the most familiar dung mushrooms in Europe and is inedible. Reports of psilocybin in it are unreliable.

Panaeolus semiovatus — Photo: kaal-kopje, CC BY-SA 3.0, via Wikimedia Commons

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

No rest period

Where it grows wild

Coprophilous: on horse dung and, less often, cow dung in pasture and moorland grazing.

Recorded at 1–3200 m, median 1305 m (102 records), including high alpine pastures.

EuropeNorth AmericaTemperate Asia

🔒 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.