In a NE-exposed avalanche area at the alpine timberline survival percentage and height growth rate of a 12 years old test planting with Larch, Spruce and Mountain Pine was examined on the most important site types (Fig. 1). The correlation between height growth of Larch and Spruce and the climatic factors irradiation, wind speed and date of snow melting is shown in a multivariate model (Fig. 2).