The present disclosure relates to the field of biostimulants used in agriculture to promote plant growth. In particular, lipopeptides are used as a biostimulant agent for plant growth, a biostimulant composition contains lipopeptides, a method for obtaining such a composition is provided, and a method for promoting an increase in plant matter by applying this composition is disclosed. In another aspect, seeds are coated with a biostimulant composition.