One of the oldest plant families in existence, ferns are the ideal low maintenance plants to add greens to indoors. They like shade or indirect light via windows, and thrive in humid conditions. They need to be watered regularly to ensure soil is always moist, and hence generally cannot be kept outdoors in direct sunlight. Certain varieties like Boston fern are very good air purifiers.
Gabbar Farms recommends scattering a few ferns to create a tropical green backdrop or planting them in corridors with access to filtered sunlight.