Oregano is an herb that resembles Marjoram, and frequently gardeners tend to grow both together without even knowing. The major difference between the two herbs though is that Oregano tends to be a bit more on the wild side with a kick; while Marjoram has a more mild and delicate flavor. Both are great additions to be grown near any vegetable, preferring though to be planted in sandy loam, well-drained soil. Oregano should be used in Italian dishes with tomato, summer squash and potatoes. Marjoram should be used to complement dishes that are bean and mushroom based.