About Grzybolog

Mushroom picking without guesswork: where conditions are right, what is edible and what must never go into your basket.

Last updated:: 9 November 2026

Grzybolog (from the Polish “grzyb”, a mushroom) is a free website for mushroom pickers and forest lovers in Poland. It brings together three things you usually have to collect from different places: a daily forecast of conditions for a mushroom flush in every district, an atlas of species with warnings about their look-alikes, and a foraging calendar for the whole year, from wild garlic to quince liqueur.

Our principles

Safety first: for every species we say what it gets mistaken for, and for poisonous ones what symptoms they cause.
Facts with sources: every species description has a list of sources, and we give the legal basis for the rules we describe.
Where sources disagree, we choose the safer version.
An open method: the forecast formula and all its thresholds are described on the Methodology page.
This website is no substitute for a certified mushroom inspector. Show any mushroom you are unsure about to a specialist at sanepid (the state sanitary inspection).

How we are funded

The website is free. If adverts or affiliate links appear in future, they will be labelled and explained on the Affiliate links page.

Corrections

Spotted a mistake in a species description, or does the forecast clearly miss what you see in the forest? Write to kontakt@grzybolog.pl or use the contact form. Flush reports from the map help us tune the model.

Our guides (Poradnik) are written in Polish only; the forecast, the atlas, the plants and the calendar are available in English.