Abstract: The invention relates to a process for producing a support-free vegetation mat which is particularly useful for roof greening. An earth substrate and plants with roots or moss having a stackable, dimensionally stable substrate with raised edges is provided. The vegetation mat is cultivated and transported and on laying the mat is separated from the substrate by sliding or drawing off. Thus, the vegetation mats are not only cultivated, but also transported in a stackable, dimensionally stable substrate with raised edges. Only at the time of laying the vegetation mat is the latter separated from the substrate by sliding or drawing off.