What are the best air-purifying houseplants?

Q: What are the best air-purifying houseplants?

Peace Lily: Peace Lily ranked #1 in NASA's study — it removes more toxins (formaldehyde, benzene, trichloroethylene, xylene, and ammonia) than almost any other plant tested. Snake Plant: Unique among houseplants: Snake Plant converts CO₂ to oxygen at night (most plants do this only during daylight). Excellent for bedrooms. Pothos: Highly effective at removing formaldehyde — common in carpets, furniture, and building materials. Fast-growing means more leaf surface area for absorption.

🌬️ Plant Guide

Best Air-Purifying Houseplants

NASA's 1989 Clean Air Study identified houseplants that filter indoor air toxins including formaldehyde, benzene, trichloroethylene, and xylene — common in furniture, cleaning products, and building materials. These seven plants consistently appear at the top of the research. Note: for meaningful air purification, you need roughly one medium plant per 10 m² of floor space.

Peace Lily

Spathiphyllum wallisii

Peace Lily ranked #1 in NASA's study — it removes more toxins (formaldehyde, benzene, trichloroethylene, xylene, and ammonia) than almost any other plant tested.

💡 Tip: Place in a bathroom or kitchen where humidity is naturally higher and air quality concerns are greatest.

🩺 Problems →🌿 Care Guide →

Snake Plant

Sansevieria trifasciata

Unique among houseplants: Snake Plant converts CO₂ to oxygen at night (most plants do this only during daylight). Excellent for bedrooms.

💡 Tip: One of the few plants safe to keep in a bedroom. Its nighttime oxygen production makes it ideal for improving sleep environment.

🩺 Problems →🌿 Care Guide →

Pothos

Epipremnum aureum

Highly effective at removing formaldehyde — common in carpets, furniture, and building materials. Fast-growing means more leaf surface area for absorption.

💡 Tip: Trailing varieties cover more surface area. Let it grow long for maximum air-filtering benefit.

🩺 Problems →🌿 Care Guide →

Philodendron

Philodendron spp.

Heartleaf Philodendron is particularly effective against formaldehyde from wood products and insulation. The larger the leaves, the better it performs.

💡 Tip: A mature, well-lit Philodendron with large leaves is more effective than a small cutting. Let it grow.

🩺 Problems →🌿 Care Guide →

Anthurium

Anthurium andraeanum

Effective against ammonia — found in cleaning products and fertilisers. The waxy leaves also trap airborne dust particles.

💡 Tip: Wipe the glossy leaves regularly — clean leaves absorb toxins more effectively.

🩺 Problems →🌿 Care Guide →

Monstera

Monstera deliciosa

Monstera's large leaf surface area makes it an efficient air purifier. It removes formaldehyde and releases significant amounts of oxygen during the day.

💡 Tip: Larger Monstera plants are more effective — a mature plant with 10+ large leaves makes a meaningful difference.

🩺 Problems →🌿 Care Guide →

Calathea

Calathea spp.

Calathea's large, patterned leaves are efficient at transpiration — releasing moisture and processing toxins. Particularly good for formaldehyde removal.

💡 Tip: Calathea's high transpiration rate also naturally humidifies the air — a dual benefit in dry heated rooms.

🩺 Problems →🌿 Care Guide →

Bottom Line

For the best air-purifying effect, mix plant types — a Snake Plant for the bedroom (nighttime oxygen), a Peace Lily for the living room or bathroom (broadest toxin range), and fast-growing Pothos or Philodendron in rooms with new furniture or fresh paint. No single plant will transform your air quality, but a well-placed collection makes a measurable difference.