The scientific answers here are above and beyond the call of duty! Greek oregano tends to be the most savory and earthy, while Italian is milder and Turkish is more pungent. The herb is also one of the top three antioxidant-rich spices. ITALIAN OREGANO Origanum majoricum. Culinary varieties, such as Greek or Italian oregano, have a strong aroma and a warm pungent taste. But as someone who cooks with oregano often, I’d like to chime in with the uses and the flavor profile information, as well. Because it retains its flavor well, oregano can be used either fresh or dried. Oregano is usually grown as a small evergreen subshrub in mild climates. European oregano, also known as Greek oregano, Turkish oregano and Mediterranean oregano, comes from one plant while Mexican oregano comes from another. Italian dishes are practically synonymous with oregano; it is hard to imagine pasta sauce or pizza without it. Oregano can work as a substitute for Mexican oregano especially since people outside of Mexico are most likely to have it in their spice cabinets, though it is not the best possible substitute. It's also known as wild marjoram. Oregano from these areas is robust in flavor, though different varieties may be more bitter, sweet, or peppery than others. Oregano (Origanum vulgare) in flower. A delicious culinary herb that is essential to your Italian dishes. hirtum). Oregano (Origano in Italian) is probably the herb most commonly associated with Italy in the United States, however, it is not the mostly commonly used herb in Italian cuisine (that distinction would probably go to parsley or basil). With its pungent flavor, oregano gained great popularity in the United States after WW II, when returning… The minty and savory aspect or oregano’s flavor profile can stand in for the licorice notes that you get from Mexican oregano. Outdoors, it does best in zones 5 to 10 and should be planted in a sunny spot with well-drained soil. Sometimes known as true oregano or Italian oregano, this is the familiar herb used on pizzas and in tomato sauces. Christian Bauer. So why are they both called oregano? Their flavors are different, too. If you are using the fresh herb, use twice the amount of it as you would the dried called for in a recipe. Although their tastes are distinct, they do share some flavor notes in common -- and when dried, they're almost indistinguishable by sight. Very thorough and insightful. oregano. Italian Oregano is an excellent variety with a strong spicy flavor used in Italian cooking. Oregano is a great source of maganese and Vitamin K, important in blood clotting and bone health. The strong, peppery flavor of oregano is a favorite in Italian rubs and spices—and is most notably present in pasta sauces. Its best-known variety is Greek oregano (Origanum vulgare var. Oregano's rich flavor deepens and melds flavors of soups and sauces without overwhelming the dish. Ornamental cultivars are typically more bland in flavour and not suitable for cooking. Many other varieties of common oregano are available.