Experimental data set of cover crop mixture and weed control in tropical summer and winter in Reunion Island.

Weed pressure is a main biotic constraint in tropical agriculture. Cover crop mixtures have increased in popularity to limit weed growth through competition for shared resources but the relation between cover crop diversity and weed suppression is still under debate. This study aimed to assess the impact of increasing cover crops diversity (one to four species) on weed control during two 4-month growing seasons (tropical summer and winter) in Reunion Island. Weed control was expressed in terms of ground cover by weeds and weed aboveground dry mass and linked to cover crop traits in the mixtures.