Forage rape provide leafy, high quality feed at later times than hybrid leafy turnips. Forage rape generally grow more dry matter from each grazing than leafy turnips. However they generally provide fewer grazings in total than leafy turnips.
The maturity of forage rape is important to ensure that utilisation is optimised. Forage rapes have a distinct trait that when mature, the leaves turn from purple to a bronze colour. Grazing should not commence until maturity to avoid animal health issues.
Plant breeders have introduced kale genetics into forage rape varieties to increase aphid and pest tolerance, frost tolerance and general hardiness.