Herbaceous. Sun.
Greek oregano is one of the 'choices' for a culinary oregano; it has a very strong flavor, and is almost hot tasting. Somewhat invasive. Very easy to grow. This oregano is herbaceous, dying back to the ground during the winter. It spreads along the ground, looking very much like a groundcover, but by mid summer sends up flowering shoots to 1 foot tall.
This is a great oregano to chop fresh onto pizza, or add a bit to your summer tomato salad. This is also the primary oregano used for medicinal purposes - when you buy oregano essential oil, this is what you get!
Plant in full sun, with little water or fertilizer.