Marjoram originates in the Mediterranean, where it was regarded as a symbol of happiness by Greeks and Romans.In cooking, marjoram is an herb used as a seasoning, often included in mixtures such as Herbes de Provence and Za'atar.4|Although marjoram is sensitive to cold, it can still grow in areas with hardiness zone 5.Marjoram contains aromatic thymol and carvacrol, which can aid digestion, relieve bloating, and relax muscles.