Red September

The leaves of blaeberries (Vaccinium myrtillus) turn red or yellow in September, before being shed for the winter.

Cowberries (Vaccinium vitis-idaea) are evergreen, and their berries ripen to bright red in September, while a few late flowers will bloom even in October.

September is the month when the berries of the rowan tree (Sorbus aucuparia) turn bright red, attracting birds which eat them and disperse their seeds.

In good years for fungi, fly agarics (Amanita muscaria) are abundant under birch trees, which they grow in mycorrhizal association with.

This bright red-capped fungus (Russula emetica), known as the sickener, is also common in the forest in September.

Red bog-moss (Sphagnum capillifolium) is red throughout the year, but its colour is often more intense in wet months like September, when there can be a lot of rain.