A peat bog is formed in a place where the water level is permanently high and the surface - permanently wet. Due to their qualities, the peats as well as the plants growing on it, absorb water like a sponge, lifting its column ever higher. Peat bog formation is a long lasting process. It may take many thousands of years.
Due to the type of water supply, 3 main types of peat bogs can be distinguished: low, intermediate and high. The majority of peat bogs in the Łagowski Landscape Park are intermediate bogs. They are supplied with rain water flowing down the basin slopes, and with ground and surface waters. Plant species typical for the high and low type grow here. The basic plants are a variety of moss consisting of peat moss (e.g. Sphagnum fallax, Sphagnum cuspidatum) and brown moss (e.g. polytrichum moss, ribbed bog moss). The moss area is overgrown with bog cranberries, Eriophorum vaginatum, Eriophorum angustifolium [the common cotton grass] and Carex sylvatica. In many places, bog arum grows luxuriantly. Among bushes, the grey willow dominates.
The peat bogs in the Wędrzyn military training grounds are a sanctuary for rare animal species, for instance amphibia, such as fire-bellied toads, European tree frogs, and cranes.