Outside the flood channels there will be extensive planting of various types of trees, including individual trees and forest areas. Once the construction work is complete, the area surrounding the Main will also be replanted with naturally-occurring riverside woods. Riverside woods can generally cope with frequent flooding depending on its severity.
Willow and alder and various shrub species will be planted on the banks of the Main as "softwood" that has adapted to the constant flooding and changing habitat caused, for example, by riverbank erosion. Species such as the rare kingfisher will benefit from this work.
In contrast, hardwood riverside woods will be planted in areas near the flood channels that are periodically flooded but aren't permanently wet. Typical species include English oak, European ash and sycamore. Especially in the spring during the so-called "spring geophyte", attractive plants such as the wood anemone and corydalis bloom in lowland forest coverage. In combination with tall forb and extensive grasslands, riverside woods represent valuable habitats along the river
Mixed oak forests, including such species as the common oak, hornbeam and linden tree, are planted on the higher railway embankment areas. These forests too, which are to be planted as naturally as possible, represent an important habitat for many plants and animals. In addition to the habitat function for plants and animals, all woodland and forest areas help prevent erosion, aid with humus formation and soil development, improve the filtering effect for contaminants, and enhance the appearance of the landscape.