A framework has been developed which describes the test needs for risk assessment of plant allelopathic properties. The framework is of importance for national legislators as well as legislators at European level (DG Agriculture, DG Environment, DG Consumer Health). Already in the project preparation phase, a framework was described for the evaluation of the allelopathic properties of wheat and used throughout the project. The project results proved that a broad range of tests is needed when risk assessment of allelopathic properties is performed.