Lincolnshire has long been a primarily agricultural area, and it continues to grow large amounts of wheat, barley, sugar beet, and oilseed rape. In south Lincolnshire, where the soil is particularly rich in nutrients, some of the most common crops include potatoes, cabbages, cauliflowers, and onions. Lincolnshire farmers often break world records for crop yields. South Lincolnshire is also home to one of the UK's leading agricultural experiment stations in research for the British potato industry.

In the south of the county more labour-intensive crops are produced, such as small vegetables and cut flowers.