It is common for cover crop planting to overlap with harvesting of the annual crops. However, COMET-Farm is only able to model one crop growing at a time, and a maximum of 3 crops per year, including cover crops. Ensure that the crops do not overlap in dates. To ensure the best results, set the cover crop plant date the days after the harvest date for the annual crops. COMET Farm assumes that the cover crops were already planted and germinating on the cover crop plant date.