Oregano

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 related to the herb marjoram, oregano also being known as wild marjoram. It is a perennial, although it is grown as an annual in colder climates, as it often does not survive the winter months. It grows to 20 inches, with purple 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.

Origanum vulgare