Knowledge on plant uses is often compartmentalized into fields. Our hypothesis is that if a plant species allows several uses of interest, in different fields, then its cultivation and formulation may be of interest to new value chains. Establishing a knowledge database on multi-purpose plants is one way of facilitating interactions between disciplines, in addition to proposing new solutions to be explored in organic or ecological farming. This paper describes how to construct such a Knowledge Database. A comparison between the uses present in the different tabs makes it possible to identify 16 plant species reported for at least four different uses.