Field knowledge
Forager’s guide

The guide contains practical mushroom knowledge: how to tell edibles from toxic lookalikes, where and when to look, and how to forage safely. Foragers write the articles for other foragers.

A comparison plate shows a parasol mushroom next to a death cap, together with their diagnostic features.
01Guide
Parasol vs death cap: four features that save lives

The parasol is a rewarding mushroom for beginners, but confusing it with the death cap can be fatal. You can tell the two apart by four features: the snakeskin pattern on the stem, the movable ring, the volva and the scales on the cap.

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A field-guide style comparison plate shows a porcini next to a devil’s bolete.
02Guide
Porcini or devil’s bolete? Telling them apart in the field

The porcini and the devil’s bolete only look alike from a distance. Up close you can tell them apart by the pore colour, the flesh reaction and the stem. This guide describes the features that settle the question.

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An illustrated plate shows a chanterelle next to a false chanterelle and the difference between ridges and gills.
03Guide
Chanterelles and their lookalikes: how to recognise the true chanterelle

A chanterelle has ridges instead of gills, and the ridges run far down the stem. Neither the false chanterelle nor the toxic jack-o’-lantern has this feature. This guide shows how to check it in the forest.

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A porcini grows in moss beneath a spruce, and golden light falls on the forest floor.
04Guide
Where and when porcini grow: how to find good spots

Porcini grow under the right trees when the soil is moist and warm. This guide explains which trees they live with, when to go out after rain and what to look for in the forest litter.

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Four frames show the four seasons: a morel, chanterelles, a porcini and a frost-covered velvet shank
05Guide
A mushroom calendar: what to pick and when, all year round

The mushroom season is not limited to September. Morels grow in spring, chanterelles and porcini in summer, honey fungus in autumn and velvet shanks in winter. This guide goes through the year season by season.

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Three photos show the same patch of moss: during a downpour, with white mycelium threads in the wet litter and with young porcini in warm light
06Guide
When mushrooms come out: rain, temperature and a week of waiting

Fruit bodies usually appear one to two weeks after a heavy rain, when it is warm but not hot. This guide explains how the weather of the past days shapes a flush and how to read the conditions index in the Grzybiarz app.

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A wicker basket of mushrooms and a forager’s knife lie on the forest litter
07Guide
Seven rules of safe foraging

Safe foraging comes down to a few habits: pick only species you are sure of, get to know the whole mushroom and trust knowledge over myths. This article explains seven such rules.

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A phone rests against a mossy log on the forest floor, and its screen shows a dark map with amber mushroom markers and a range ring
08Guide
Podgrzybek GO: virtual mushrooms in a real forest

Forest Hunt is the field game inside the Grzybiarz app. Virtual specimens stand in real woodland and in city parks, and catching one means naming the species. This article explains how the quiz, the Mushroom index, the mycelium, flushes, the leaderboard, seasons and playing with friends work.

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Forager’s guide: identification, lookalikes, season · Grzybiarz