Mushroom calendar

When the sulfur polypore originated in the United States and Canada

Updated on October 28, 20261 min read
When they are found

When was he born? the sulfurous polypore in the United States and Canada.

The sulfur polypore in the United States and Canada is found mostly from June to October, with its peak in September.

Laetiporus sulphureus

January: 0.4% of observationsGFebruary: 0.2% of observationsFMarch: 0.4% of observationsMApril: 1.5% of observationsAMay: 6.3% of observationsMJune: 8.0% of observationsGJuly: 12% of observationsLAugust: 20% of observationsASeptember: 30% of observations30%SOctober: 17% of observationsONovember: 3.9% of observationsNDecember: 1.1% of observationsD
Month-by-month observation rate. September stands out, as the month with the most documented finds.

On 69,796 observations documented public in the United States and Canada from 2011 to 2025.

Because every year is different

  • The season opens with rain: after a heavy rain, with the soil still warm, it takes one or two weeks.
  • In mountain It begins earlier and ends earlier than on the plain, and the same is true for the northern slopes.
  • A'dry summer It pushes it forward, sometimes by weeks. A mild autumn lengthens it.

The calendar says the months. Which day, in your forest, this year, the rain that fell there tells you: MushScout follows it day by day and tells you when it's time.

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The sulphurous polypore, in other regions

All regions compared →

Other mushrooms in the United States and Canada

The complete schedule in the United States and Canada →

Data: GBIF.org — GBIF.org, observations with coordinates 2011-2025, counts by month (facet). The observations say when people have documented a find, not how many mushrooms there were.

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