Agaricus californicus

Mock meadow mushroom

A white, slightly yellow-staining Agaricus of California that is easily mistaken for edible meadow and button mushrooms but causes stomach upset. It is not cultivated; conditions below are inferred from its coastal Mediterranean climate.

Agaricus californicus — Photo: pellaea, CC BY 2.0, via Wikimedia Commons

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

Expects a seasonal rest

Where it grows wild

A saprotroph of soil and litter in grassy places and under trees, including gardens and parks.

Lowland: 0–245 m, median 81 m (12 records).

CaliforniaWestern 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 2.0 licence, unmodified.