Alfalfa is grown as a cultivated forage plant; its flowering period continues from late spring to autumn. It contains a lot of proteins, tannins, saponins, coumarin compounds, estrogen-like substances, vitamins C, D, E, K and carotene, chlorophyll, minaral macro- and microelements. Alfalfa is even considered to be the richest known source of microelements: ferrum, calcium, phosphorus, magnesium, sulfur, potassium and silicon among plants growing on land.