[1] Growing season in taiga areas is generally considered to be measured as the number of days for which average daily temperature exceeds 5 °C (41 °F).

The longest growing season for the Scandinavian and Russian taiga occurs in the locales with marine influence from the North Sea and Baltic Sea: in coastal areas of Norway, Sweden and Finland the growing season of the closed boreal forest can reach as high as 145 to 180 days per annum.

In these southern elements of the ecoregion, closed canopy boreal forest with some temperate deciduous tree species interspersed among the dominant conifers, including maple, elm and oak.

Some of the elements of the ecoregion are rich in wetlands, as exemplified by the Femundsmarka National Park in Norway, which is replete with marshes and lakes.

[1] Native non-endemic threatened avian species in the ecoregion are:[1] The following is a partial list of protected areas lying within the Scandinavian and Russian taiga:[1]