The costs of growing forage crops can vary massively, from cheap and cheerful, fast-growing crops like forage rape, to expensive crops that deliver good energy values, like beet.It is essential to know your costs of production no matter what crop you are growing. Table 1 shows you the estimated costs and returns of growing a forage crop, according to Teagasc figures. The figures are estimates only and growers should substitute their own figures where possible.