This alliance includes weed vegetation with C4 grasses such as Digitaria sanguinalis. Echinochloa crus-galli and Setaria spp., occurring on dry soils in warm lowland areas. It is common in eastern Europe, while in central and western Europe it is increasingly restricted to sandy soils. It develops mainly in maize, root-crop or vegetable fields and in vineyards. Most species are warmth-demanding annuals that germinate late in the season and prefer cultures that are harvested in late summer or early autumn.