Mushroom season starts strong but harvest remains unpredictable

The early summer mushroom season has begun promisingly in Finland, with recent rains accelerating growth, Yle reports. Warm, wet conditions have created ideal circumstances for summer mushrooms, which have been scarce in recent years due to drought and heat.

July harvests have often been weak, as the month has frequently been too dry and hot for summer varieties that thrive in warm, rainy conditions, according to Janne Lampolahti, secretary of the Pori region mushroom association.

Foragers are already finding a variety of species, including early lactarius and russula, with chanterelles—among the most popular edible mushrooms—also appearing. Chanterelle season is exceptionally long, running from June through October and even beyond the first frosts.

Lampolahti confirms observations that chanterelle yields have increased across Finland, even in poor mushroom years. He attributes this to climate warming, noting that chanterelles, originally a southern species, have benefited from rising temperatures.

Despite the strong start, autumn mushroom harvests cannot be predicted. Lampolahti warns that while mid-summer rains may raise hopes, a prolonged heatwave could ruin prospects. Mushrooms themselves do not die in drought, but their mycelial networks struggle to produce fruiting bodies without moisture.

“As long as this pleasant rain and warmth continue, we can remain firmly hopeful that there will be mushrooms for the pan,” he said.