Oregano (Origanum)
All you need to know about oregano
Shrubby plant with 1 1/2-inch-long leaves grows 2 to 3 feet tall. Perennial. Zones vary.
BEST CULINARY VARIETIES: Greek (O. vulgare hirtum) has gray green leaves; zones 8-9, 12-24. Italian (O. x majoricum) has milder bright green leaves; zones 4-24.
GROWING TIP: Needs especially good drainage. Plants thrive on little to moderate water.