Fenugreek, also known as methi, is native to the Mediterranean and South Asia, and is popular in northern Indian cuisine. Its leaves are used as an herb and as a vegetable, and its seeds are used as a spice. The leaves have a much milder flavor than the seeds, tasting somewhat like a blend between fennel and celery.
Fenugreek is in the bean family, Fabaceae, and makes an excellent addition to crop rotations because of nodules on the plant's roots that restore nitrogen in the soil. The process is known as biological nitrogen fixation.