The literature on producer organisations in the agro-food sector mainly focuses on factors facilitating their establishment. Much less attention instead, is paid to investigate the way in which these organisations function. This concerns in particular their market behaviour. For example, we have only limited knowledge about marketing channels used by these organisations and about the range of products they offer. This report attempts to address these weaknesses and improve our understanding in both these respects. To do so, the report explores market behaviour of fruit and vegetables producer organisations. The specific example that the report presents comes from Poland, a country which is among the biggest producers of fruit and vegetables in the European Union.