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Species library › Agaricus › Agaricus pattersoniae
Fungi Partly documented

Agaricus pattersoniae

Agaricus pattersoniae is a large, edible brown-scaled mushroom of coastal California that fruits under old Monterey cypress trees in the winter rains. It is listed as Vulnerable, threatened by cypress decline, drought and tree removal. It has not been cultivated, and its association with mature cypress may be hard to reproduce.

Agaricus pattersoniae
Photo: J-Dar, CC BY-SA 3.0, 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 ShadeDLI and PPFD in Plantistry
Expects a seasonal rest

Where it grows wild

Fruits singly or in groups in the needle litter under mature Monterey cypress, usually trees over 40 years old, in parks and on campuses as well as native groves.

Lowland coastal sites; few records carry an elevation.

California

🔒 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.