Native to Central America, Monstera are a species of tropical vines from the aroid family. Monstera houseplants are known for their gigantic leaves with fenestrations (holes), which is why they are commonly referred to as the “swiss cheese plant”. There are a few reasons why your Monstera leaves are not splitting, including: a very young plant, inadequate light, or improper care. Learn more about why your Monstera leaves don’t have holes, why they develop fenestrations, and what you can do to promote them.