Sometimes included in a herbal ley for pasture and with forage brassicas. Fast growing green manure crop which has a similar effect to mulch. It improves soil structure, fertility and micro-organism activity. Plant in autumn and dig into the soil in late winter/early spring before flowering. The broken down organic matter will then help to provide optimal soil conditions for spring planting.
To get an even more effective manure crop combine lupins and mustard seed at a rate of three parts blue lupin to one part mustard.