tOn-farm environmental assessment, with consideration to the specificity of the farming system and thegeographic zone, can enable farmers to include the environmental aspect in their management decisions.In the province of Quebec, Canada, 45% of the cultivated land is dedicated to grain production and amongthe 13,800 farms that sell grains, 3975 are specialized in this production. Cereal-based systems havetheir own constraints and realities and could benefit from a specific tool to assess their environmen-tal sustainability. The objective of this research was to adapt and further develop a set of indicators ofenvironmental sustainability at the farm level for cash-crop farms of the province of Quebec, in order toprovide a self-assessment and decision-aid tool to farmers. Using a methodology based on focus groupsof experts (researchers, stakeholders, and farmers), several indicators developed for dairy farms wereadapted to cash-crop farms. Then the set of indicators was tested on cash-crop farms across the provincethrough interviews with 31 farmers. The indicators were weighted according to their contribution tofour sub-objectives of environmental sustainability (soil, water, air, and biodiversity conservation). Anew type of chart was designed to help farmers understand and interpret the scores obtained from theset of indicators. Finally, a questionnaire was sent to the 31 farmers for end-use validation. A total of 16indicators emerged from this research. The weighting reveals that, out of a total of 177 points, the indi-cators that contribute the most to environmental sustainability of cash-crop farms are “integrated pestmanagement” (21 points), “crop diversity” (19 points), “riparian buffer strip” (18 points), and “incorpo-ration of manure into the soil” (16 points). In comparison with a radar chart and a conventional bar chart,a new bar chart revealed to be a better decision aid tool, allowing the majority of farmers to identify thesustainability weaknesses of a fictive farm. However, the graphic design of this chart could be improvedfor easier understanding. The end-use validation confirmed the interest of farmers in this decision-aidtool.