Brown Mustard (Brassica juncea) is a cost effective, winter hardy, easy to establish green manure/cover crop that is used to supress weeds, improve soil structure and move water from deep down in the soil closer to the surface. It has strong early vigour and very good autumnal growth. It is very useful for its biofumigation properties where it is active against many soil borne pests and diseases, especially for potato growers. It is also a very effective Nitrogen catcher when turned over and put back in to the soil. As a green manure crop, Brown Mustard would be available between 50-70 days from sowing.