In a pot, plant your oregano using a well drained to sandy loam soil. Place your pot where it can receive at least 6 hours of sun every day and water it once a week. Harvest your oregano when it is about 6-7 inches tall. Trim your oregano plant as frequent as possible to produce healthier oregano foliage. Use your harvested oregano in creating your favorite Italian dishes, or use it as toppings to your favorite pizzas.