March mushroom (Hygrophorus marzuolus): where and when

The one that comes up under the retreating snow. Cold, hidden and among the most sought after of the year.

Grey March mushrooms coming up through melting snow in a mountain forest
March mushrooms peeping through the snow at the end of winter: dark grey cap, widely spaced waxy gills and a thick, pale grey stem.

The march mushroom (Hygrophorus marzuolus) comes out from January to May, at its best in February, in woods of Scots pine and black pine, with some beech and silver fir, mostly in the mountains.

See where it is ready this week

No area is ready for March mushrooms this week: the forest is still asleep.

The March mushroom appears in mountain pine and beech woods as the snow retreats, often still half buried. It is the first good mushroom of the year and the hardest to spot: you have to know where to look and bend down a lot.

It is not triggered by rain but by the thaw: soaked, cold ground, just a few degrees above freezing, for weeks. The map follows it in the high areas where that thaw is under way.

What it needs to come out

First, a rain that soaks the ground, no downpour needed. Then patience: it usually appears after two or three weeks, as long as the soil holds on to that moisture and stays cold, without freezing. If a frost, too much water or a drying wind comes in between, the flush is aborted and never shows.

Where to look

It comes out in woods of Scots pine and black pine, with some beech and silver fir, mostly in the mountains, without being fussy about the soil.

March mushrooms by province (in Spanish)

How the forest is doing this week

Forecast of 11 September, updated every day.

Mushrooms that share its woods

How we know when the forest wakes up (in Spanish).