Nancy says: "Oregano is one of the EASIEST perennial herbs you can grow. I takes sun or partial shade and makes an excellent, fast spreading, edible ground cover. It will self sow if you let the flowers ripen."
Hudson Valley Seeds says: "While oregano evokes images of scrubby herbs on Mediterranean cliffs, in the Northeast, oregano is a champion of the cold, one of the first perennial herbs to emerge from winter dormancy. In fact, it is so tolerant of winter that it rarely dies back entirely and can often be harvested the year 'round, anytime the ground is not covered by snow. Use it as the ancients did, making wreaths in honor of Aphrodite to crown the heads of newly married couples. Or, harvest loads of it in May or early June--before it turns more pungent from flowering--and dry in a warm airy place. With only a couple 3-foot clumps you can easily dry enough for a year's worth of delicious soups and sauces."