Just about the easiest flower to grow is Asclepias otherwise known as Milkweed and Butterfly Weed. Massive flowerheads fill the summer garden over a long season, attracting every honeybee, butterfly, and hummingbird in the neighborhood. A long lived perennial that thrives in sun and just about any kind of soil, Milkweed will become one of your most treasured plants, not only for its good looks but for its super easy nature.