The Swiss cheese plant gets its name from its large, heart-shaped leaves which, develop holes as the plant ages, making its leaves resemble Swiss cheese. They grow best in bright, indirect light, or partial shade. They're used to thriving under the cover of large trees in the jungle, and can easily burn if exposed to too many direct sun rays. Swiss cheese plants grow best in peat-based potting soil. They like to be consistently moist, but not soaked. They also thrive in high humidity. They are vining plants and will require support. Toxic to pets.