One of the most recognizable and loved ornamental plants available, Colocasia (Elephant Ears) are suitable for everything from containers to bog gardens. Their extremely large leaves come in a variety of colors, from light green to purples that are so dark they appear black. Easy to grow and tolerant of wet soils, Colocasia display their stunning leaves atop 3- to 7-foot stems and can even reach lengths of 2 or 3 feet themselves.