Oregano
Origanum vulgare
At a Glance
| Botanical name | Origanum vulgare |
|---|---|
| Common name(s) | oregano |
| Family | Lamiaceae |
| Plant type | perennial (grown as an annual in colder climates) |
| Height × Spread | 90 cm × 50 cm |
| Hardiness | — |
| Position | Full sun |
| Soil | fairly dry soil |
| Flowering | July–September |
| Toxicity | — |
| Native range | Mediterranean region |
Overview
Origanum vulgare, commonly known as oregano (UK) or wild marjoram, is a perennial flowering plant in the mint family Lamiaceae. Native to the Mediterranean region, it has become widely naturalised across the temperate Northern Hemisphere. It is closely related to sweet marjoram (Origanum majorana), with which it shares culinary and ornamental uses. The plant is valued for its aromatic leaves, used extensively in Mediterranean and Latin American cuisines, and for its ornamental cultivars.
Botanical Description
Oregano is a woody perennial growing to 90 cm (35 in) tall and 50 cm (20 in) wide. It features opposite, spade-shaped, olive-green leaves measuring 1–4 cm (1⁄2–1+1⁄2 in) long. The flowers, produced in erect spikes during summer, are white, pink, or light purple, measuring 3–4 mm (1⁄8–3⁄16 in) in length. The plant is sometimes referred to as wild marjoram.
Origin and Habitat
Native to the Mediterranean region, Origanum vulgare has naturalised widely across the temperate Northern Hemisphere, including Europe, Asia, and North America. It thrives in habitats with a hot, relatively dry climate, though it adapts to various environments.
Cultivation
Plant in early spring, spacing specimens 30 cm (12 in) apart in fairly dry soil. It requires full sun exposure and tolerates a soil pH range of 6.0 (mildly acidic) to 9.0 (strongly alkaline), with a preferred range of 6.0–8.0. The plant prefers hot, dry conditions but grows well in other temperate environments.
Care and Maintenance
Oregano requires minimal care once established. Water sparingly, as it thrives in dry conditions. Prune after flowering to maintain shape and encourage bushiness. In colder climates, it may be grown as an annual due to winter survival challenges. The plant benefits from well-drained soil and full sun exposure.
Uses
Culinary: Oregano is a staple herb in Mediterranean and Latin American cuisines, particularly Italian, Greek, Turkish, and Mexican. Its leaves, used fresh or dried, impart an earthy, warm, and slightly bitter flavour. Dried oregano is commonly used in Greek salad, tomato-cucumber salads in Portugal, and as a seasoning for meats, fish, and vegetables. It is a key ingredient in za'atar spice blends and Argentine chimichurri. Ornamental: Numerous cultivars are bred for ornamental value, including 'Aureum' (golden foliage, RHS Award of Garden Merit) and 'Greek Kaliteri' (compact, silvery-haired leaves with strong flavour). It is also used in herbal teas, particularly in northern Albania.
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Cultivars and Varieties
| Cultivar | Height | Flower | Notes | AGM |
|---|---|---|---|---|
| 'Aureum' | — | — | golden foliage (greener if grown in shade), mild taste: It has gained the Royal Horticultural Society's Award of Garden Merit | |
| 'Greek Kaliteri' | — | — | O. v. subsp. hirtum strains/landraces, small, hardy, dark, compact, thick, silvery-haired leaves, usually with purple undersides, excellent reputation for flavour and pungency, as well as medicinal uses, strong, archetypal oregano flavour (Greek kaliteri: the best) | |
| 'Hot & Spicy' | — | — | O. v. subsp. hirtum strain | |
| 'Nana' | — | — | dwarf cultivar |
Quick Care Summary
| Sunlight | Full sun |
|---|---|
| Soil | fairly dry soil |
| Hardiness | — |
| Sow | March–May |
| Plant | March–May |
| Prune | — |
Facts sourced from Wikipedia / Origanum vulgare (https://en.wikipedia.org/wiki/Origanum_vulgare)