<p>Tree-ring-based analysis of landslide movements is currently one of the most effective tools for spatio-temporal reconstruction of landslide reactivation events. Only trees that show their growth affected by landslide movements (dominantly tilted trunks) are used for research. However, this study is aimed at revealing the potential amount of relevant information in trees that do not show any external disturbances. For this purpose, 126 trees (<i>Picea abies</i> (L.) Karst. individuals only) on the selected landslide were sampled, 71 of which were tilted and 55 had a straight trunk. In the analysis, attention was focused only on the growth reaction directly associated with the trunk tilting, i.e., reaction wood (compression type in conifers). Analyses revealed that the tree-ring series of straight trees contained comparable amounts of reaction wood occurrence in the older half of tree lives as the tilted trees. However, the duration and intensity of reaction wood in straight trees were less than in tilted trees. The age of straight trees was lower at the time of reaction wood formation than that of tilted trees. However, the older (the first half of their life) straight trees revealed two more landslide events than tilted trees. In contrast, the younger straight trees no longer detected any landslide event. Thus, straight trees probably grew on parts of the landslide where there were fewer movements and, moreover, in an earlier period, with which these trees were already able to cope and return their trunks to their original vertical position. Thus, the general recommendations for sampling trees in dendrogeomorphic landslide research can be supplemented by sampling also straight trees (considering their spatial positions), which can provide key information on landslide reactivation in the older periods of the constructed chronology.</p>