Oregano (UK /ɒrɨˈɡɑːnoʊ/ or US /əˈrɛɡənoʊ/), scientifically named Origanum vulgare by Carolus Linnaeus, is a common species of Origanum, a genus of the mint family (Lamiaceae). It is native to warm-temperate western and southwestern Eurasia and the Mediterranean region.
Oregano is a perennial herb, growing from 20–80 cm tall, with opposite leaves 1–4 cm long. Oregano will grow in a pH range between 6.0 (mildly acid) and 9.0 (strongly alkaline) with a preferred range between 6.0 and 8.0. The flowers are purple, 3–4 mm long, produced in erect spikes. It is sometimes called wild marjoram, and its close relative O. majorana is known as sweet marjoram.
Oregano is a perennial growing to 20 inches, with pink flowers and spade-shaped, olive-green leaves. It prefers a hot, relatively dry climate, but will do well in other environments. To cultivate, it should be planted in early spring, in fairly dry soil, with full sun. The plants should be spaced 12 inches apart.
Closely related to the herb marjoram, oregano is also known as wild marjoram. Oregano is a perennial, although it is grown as an annual in colder climates, as it often does not survive the winter months.