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Species library › Psilocybe › Psilocybe cyanescens
Fungi Well documented

Psilocybe cyanescens

Wavy cap

A wavy-capped psilocybin mushroom that fruits in huge numbers on hardwood wood-chip mulch in cool, wet autumns, mainly in the Pacific Northwest and western Europe. It needs a cold drop to fruit and grows much more easily outdoors than indoors. Psilocybin is a controlled substance in most countries, and growing this mushroom is illegal in many places; check local law before cultivating.

Psilocybe cyanescens
Photo: This image was created by user Alan Rockefeller (Alan Rockefeller) at Mushroom Observer, a source for mycological images.You can contact this user here., 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 Dappled lightDLI and PPFD in Plantistry
Expects a seasonal rest

Where it grows wild

A saprotroph on wood chips in mulched beds, parks and landscaping, and on woody debris at forest edges. It needs lignin-rich wood and does not grow on bark mulch. It fruits in dense clusters in autumn.

Mostly lowland; the 60 records with an elevation span 0–2755 m (median 456 m).

Pacific Northwest and CaliforniaWestern and Central EuropeNew ZealandWestern 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.