A harvesting header includes.at least one draper belt system including a conveying surface operable to carry cut crop material in a conveying direction generally transverse to a direction of travel of the harvesting header in operation to a header discharge. The header includes a crop reel rotatable about a crop reel axis, said axis generally parallel with the conveying direction, said crop reel operable to, when rotated in operation, draw crop material onto the conveying surface and at least one crop flow assistance device having a crop flow assistance surface that extends into a volume above the conveying surface, said volume defined by the conveying surface and projected perpendicular to said conveying surface, said crop flow assistance surface operable to roll crop material onto the conveying surface while the crop material is carried to the header discharge in operation.