Agaricus xanthodermus

Yellow stainer

A poisonous Agaricus that stains chrome yellow at the stem base and smells of ink or phenol. It causes about half of all Agaricus-type poisonings. It is a saprotroph of woods, lawns, gardens and hedgerows and fruits in autumn. It is not a food crop; grow it only for study.

Agaricus xanthodermus — Photo: Velella, 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 Dappled lightDLI and PPFD in Plantistry

No rest period

Where it grows wild

Woods, lawns, gardens and hedgerows, fruiting from rich soil and litter.

Recorded elevations span 0–1707 m, median 300 m (53 records).

EuropeNorth AmericaWestern AsiaNorth AfricaSouthern Africa

🔒 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.