<p>Saltmarshes present a specific vegetation, which has a key role in the functioning of coastal systems, notably due to its high productivity and action of tidal force attenuation. Historically, salt marshes have been subjected to many polderization operations in order to establish anthropic activities that have sometimes disappeared today, especially in the case of small polders. Various restoration projects concerning small marsh systems are currently being implemented with the objective of restoring biodiversity or ecological connectivity, but also as nature-based solution for adaptation to global change. The present paper focuses on the restoration of plant assemblages (called vegetation groups in the article) after depolderization. Data were collected in different sites in Brittany (Western France) accidentally or voluntarily depoldered from 70 to 5&#xa0;years ago and on natural marshes (reference site). Detailed vegetation maps and topography measurements were performed. Thus, a total of 2221 patches of vegetation were mapped and characterized in terms of vegetation composition. At site scale, differences in the diversity of groups and vegetation surfaces were observed according to the type of marsh. Two categories of reference sites were observed according to the frequency of submersion: exposed (NAT-E) or unexposed natural marsh (NAT-U). Vegetation assemblage diversity appeared higher for the restored sites than natural marshes. Concerning the spatial parameters, the surface of vegetation patches was higher on unexposed natural sites (NAT-U) than both exposed (NAT-E) and depoldered sites (DEP). The number of vegetation patches was higher for the restored marshes than on the natural.</p>