It can be sort of determined that since the marigold is almost a noxious weed, it probably grows pretty easily. The marigold flower requires some basic care, but really for the most part it will grow on its own with very basic care. You will find that these flowers will grow good basically in any soil, they do also need some good drainage though, so if you are going to plant them and really want them to excel, you are going to want to have the best drainage that is there. If you don't want to grow a marigold and you see it as a weed, do the opposite.