Sweet Marjoram

Sweet marjoram can be started indoors six to eight weeks before the last spring frost or sown directly outdoors about two weeks before that date; the seed is very fine and slow to germinate. Plant it in full sun in average, dry-to-medium moisture, well-drained soil, ideally a sandy loam, where it tolerates heat and drought well once established; space plants roughly 18 inches apart to keep air moving through the foliage.

Because flavor is best in unopened leaves, pinch or shear the plants back before flower buds form to keep growth bushy and compact. As a tender perennial reliably hardy only in the warmest zones, it is commonly grown as an annual elsewhere or potted up and brought indoors ahead of frost, though container plants seldom overwinter well.

Sweet marjoram is largely free of serious insect or disease trouble, with the main hazard being root rot when the soil stays poorly drained or saturated. Occasional pests include aphids, spider mites, and whiteflies, and powdery mildew can appear on the foliage in humid conditions.

Pick leaves before the small white flowers open, when they carry their best flavor, or wait for the ball-like buds to form at the stem tips as a harvest cue. Cutting the plants back close to the ground once they begin to bloom stimulates a second flush of growth that is generally considered the better crop.

Cut stems can be air dried and kept in sealed containers for later use, while tops gathered as flowering begins may instead be dried slowly in shade or steam-distilled for their essential oil.

Culinary: the leaves, fresh or dried, season soups, sauces, salads, stuffings, stews, roasts, vegetables, meats, and teas, and their sweet, delicate flavor makes them common in blends such as herbes de Provence and za'atar. Its plant tops have also been used to produce a yellow dye.

Ornamental: the fragrant leaves and small summer flowers suit herb and pollinator gardens, and the blooms provide late-season nectar for bees.

Medicinal: across regions including Iran, Azerbaijan, England, Egypt, India, Austria, Turkey, and Morocco, dried leaves and essential oil have been used in traditional and folk medicine for a wide range of complaints, from gastrointestinal and respiratory ailments to headache and rheumatism.

Sweet marjoram is native to Cyprus and Turkey and the wider Mediterranean region, from where it spread to Spain, Italy, Algeria, Greece, and other Mediterranean countries, and eventually to Britain and India. It was known to the ancient Greeks and Romans, may have reached the British Isles during the Middle Ages, and did not become widely used in the United States until after World War II.