In principle, we only plant climate-friendly tree species in a mixed forest, i.e., we only plant species that science recommends. We also consider the climatic zone, heights, and location (damp, wet, dry, etc.) in order to make the best possible selection that will assure the long-term life of the trees. The tree species include fir, English and sessile oak, sycamore maple, red beech, wild cherry, larch, pine, alder, Douglas fir, and red oak.