Agaricus placomyces

Flat-top agaricus

Agaricus placomyces is a North American woodland Agaricus with a grey-brown scaly cap that yellows when bruised and smells of phenol. It is toxic, causing gastrointestinal upset. It lives in forest litter and disturbed ground under conifers and hardwoods.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light ShadeDLI and PPFD in Plantistry

Expects a seasonal rest

Where it grows wild

Saprobic, in groups on disturbed ground under conifers and in hardwood or mixed forest.

Recorded at 12–2979 m, median 750 m.

Eastern North America

🔒 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.