From soil analyses it appears that Centaurium littorale grows in a saline habitat. From the ecological viewpoint Centaurium littorale is a halophyte. This agrees with information in the literature. The salt concentration fluctuates. In spring low concentrations occur. This is important for the germination of Centaurium littorale. From a field experiment it appeared that rosette-plants of Centaurium littorale can withstand high concentrations of NaCl, but that seedlings die under such conditions.