The ZZ plant, officially named zamioculcas zamiifolia, is native to East Africa but thrives anywhere. Walker affectionately calls it "the king of the indestructible plants." The green tolerates the dangerous trifecta of plant-killers: drought, low light, and really low humidity, he says. A beautiful plant with dark green, shiny foliage, it grows to more than a foot tall, even indoors. "It doesn't need much water because it's got this succulent bulb the stem grows out of," adds Mattson.