Houseplants need light and air to survive. This means that they do not do well in shadier parts of the house. Installing a skylight can help you move from a few ailing plants to a thriving indoor garden. Here are some of the ways in which skylights can help your houseplants. More light Most obviously, a skylight can vastly increase the amount of light that enters a room. Most people have to crowd their plants around a window, but with a skylight, the whole room is available for growth.