Leguminous plants are special in that they fix nitrogen in nodules on their roots, which makes them invaluable as a part of sustainable agriculture or horticulture. Legumes can fix as much, or more nitrogen in the soil than could be applied using bags of nitrogen fertiliser - and with a mere fraction of the vast greenhouse gas emissions that are associated with artificial fertiliser.
This is sweet clover, not a true clover (Melilotus officinalis) that is very vigorous and is capable of growing six feet in 12 weeks!! It will be incorporated in to the soil after 6-18 months, providing masses of soil fertility to the next crop. The white or yellow flowers are very much appreciated by bees.
