Growing Oregano
Oregano (Origanum vulgare) is a hardy perennial herb that is a cornerstone of Mediterranean, Mexican, and Greek cooking. It thrives in lean, dry conditions and is one of the few herbs that is arguably better dried than fresh — the drying process concentrates its pungent, slightly bitter, warm flavor.
Varieties
Greek oregano (O. vulgare subsp. hirtum) has the strongest flavor and is the standard for cooking. Italian oregano is a hybrid of oregano and marjoram with a milder, sweeter taste. Mexican oregano (Lippia graveolens) is actually a different plant entirely, with a more citrusy and earthy flavor used in chili, salsas, and mole. If you are buying plants, taste a leaf to check the flavor — many ornamental oreganos sold in garden centers have almost no culinary value.
Planting and Care
Start from transplants or cuttings rather than seed — named culinary varieties do not come true from seed. Plant in full sun with well-drained, somewhat lean soil. Oregano does not like rich, moist conditions — those produce lush growth but weak flavor. Space plants 12–18 inches apart. Once established, oregano spreads and can be divided every 2–3 years.
Oregano is perennial in zones 5–10 and very drought-tolerant once established. Shear the plants back by half in early summer to promote bushy growth and prevent legginess. In cold climates, a layer of mulch protects the roots over winter.
Harvesting and Drying
Harvest just before the plant flowers — this is when the essential oil content is highest. Cut stems back to a few inches. Dry by bundling and hanging upside down in a warm, airy spot, or use a food dehydrator on low heat. Once dry, strip the leaves from the stems and store in airtight jars. Dried oregano retains its flavor for about a year. See Harvesting and Drying Herbs for the full process.
Culinary Uses
Oregano is essential in pizza sauce, Greek salads, roasted vegetables, and grilled meats. It is a key ingredient in za'atar (with thyme and sesame), Italian herb blends, and chimichurri (the Argentine version). Unlike basil, oregano holds up well to long cooking and can be added early in the process.