The Swiss cheese plant takes its name from its large heart-shaped leaves that form holes (called "fenestration") with age, giving its leaves the appearance of Swiss cheese. Native to Central and South America, Swiss cheese is a tropical perennial normally grown as a houseplant. It's notoriously easy to maintain and loves to climb - if you can put in a stake, a piece of moss, or a trellis for hanging, you can make some pretty displays (this creates bigger leaves too).