Fast-Growing Tropical Plant Why Dieffenbachia Dumb Cane Plants? The vibrant Dieffenbachia plant, also known as the Dumb Cane Plant, has been rated amongst the top five house plants on the market – and understandably so. For starters, it maintains its vibrant color year-round and is low-maintenance, nearly thriving on neglect. Even better? You control its size when you choose its container. And impressive, non-stop vitality takes hold, with oblong, large broad foliage in a colorful mixture of greens, yellows and whites that are forever present.