The purpose of this study is to identify the determinants of suppliers’ intensity of participation in the EU school fruit scheme (SFS) based on the example of the SFS in the German federal state North Rhine-Westphalia. In 2013/2014 approx. 100 suppliers including many agricultural enterprises or farm shops took part in a telephone survey. The data was processed by a factor analysis. Multivariate regression analyses were used to examine the determinants of intensity of participation. The findings reveal that the intensity of participation is influenced by the buyer-supplier-relationship, performance indicators and different types of costs.