5 Best Air-Purifying Indoor Plants For Better Health

Keeping indoor air clean is crucial for health and wellbeing. As studies show, certain houseplants can remove harmful volatile organic compounds and toxins from the air, acting as natural purifiers. The NASA Clean Air Study identified numerous species capable of filtering benzene, formaldehyde, xylene, and trichloroethylene, making them excellent choices for homes and offices. This article explores five of the best air-purifying indoor plants, detailing their benefits and care requirements to help you select the ideal additions to your green space.

Snake Plant (Sansevieria trifasciata)

The snake plant, also known as mother-in-law’s tongue, was one of the top performers in the NASA Clean Air Study for removing formaldehyde, benzene, and trichloroethylene from indoor air. Its upright, sword-like leaves make it a striking architectural element that thrives in a range of light conditions, from low shade to bright, indirect light. Thanks to its CAM photosynthesis, the snake plant continues to absorb carbon dioxide and release oxygen at night, making it ideal for bedrooms. It is virtually indestructible, requiring minimal watering—only once every two to three weeks—and well-draining soil to prevent root rot. Beyond air purification, keeping a snake plant in your living space may alleviate symptoms associated with poor air quality, such as headaches and respiratory irritation.

Spider Plant (Chlorophytum comosum)

Spider plants were shown to be especially effective at removing formaldehyde from indoor air, largely thanks to beneficial soil microorganisms working alongside the roots. Their arching green-and-white striped leaves and ease of propagation via “pups” make them a favourite for beginners and experienced gardeners alike. They flourish in bright, indirect light but can tolerate lower light conditions, making them versatile additions to living rooms, kitchens, or offices. Spider plants prefer consistently moist soil, so weekly watering is recommended, although overwatering should be avoided to prevent root rot. Additionally, these pet-friendly plants are non-toxic to cats and dogs, offering peace of mind for animal lovers.

Peace Lily (Spathiphyllum ‘Mauna Loa’)

Peace lilies are among the top air-cleaning plants for removing ammonia, benzene, formaldehyde, and trichloroethylene, according to NASA’s research. They also produce elegant white blooms that can last several weeks, adding both beauty and function to indoor spaces. Peace lilies thrive in medium to low light, making them suitable for bedrooms or offices with limited natural sunshine. They prefer consistently moist soil but are sensitive to overwatering; allowing the top inch of soil to dry out between waterings will keep them healthy. By increasing humidity, peace lilies can also help reduce airborne allergens and improve respiratory comfort.

Boston Fern (Nephrolepis exaltata)

Boston ferns were identified by NASA as efficacious at removing formaldehyde and xylene, both common indoor pollutants. Their lush, feathery fronds can add a burst of green to hanging baskets or pedestals. These ferns thrive in high humidity and indirect light; misting their fronds or placing them near a humidifier will help them flourish. They require evenly moist soil, so watering two to three times weekly is ideal, depending on the indoor environment. In addition to air purification, Boston ferns can help regulate indoor humidity levels, alleviating dry air issues.

Bamboo Palm (Chamaedorea seifrizii)

The bamboo palm, also known as the reed palm, ranks highly in the NASA Clean Air Study for removing benzene, formaldehyde, and trichloroethylene. Its tropical appearance—with slender canes and feathery fronds—lends a serene, palm-like ambiance to any room. Bamboo palms prefer bright, indirect light but can tolerate lower light areas, making them highly adaptable in indoor settings. They enjoy evenly moist soil and benefit from routine misting or a nearby humidifier. Beyond air purification, bamboo palms add moisture to the air, helping to counteract the dryness produced by heating or air conditioning.

Integrating these five air-purifying plants into your home or office can naturally enhance air quality, reduce toxin levels, and improve overall wellbeing. Position at least one large plant per 100 square feet to achieve meaningful air-cleaning effects, or group several smaller specimens together for maximum impact. While no plant can replace mechanical air purifiers entirely, combining these green allies with good ventilation offers a cost-effective, sustainable approach to healthier indoor environments.