The analysis of long term experiments in forest research is often based on statistical methods that provide statistical key parameters but do not address the spatial relationships within a stand. The spatial distribution of trees, the micro-heterogeneity of sites and management regimes will affect the interaction and growth of trees. In this paper the application of geostatistical analysis for the investigation of the spatial pattern is shown for a forest stand in the Bernese Pre-alps in Switzerland. It can be shown that the growth rates of individual trees show a pronounced spatial pattern.