Best Indoor Plants for Air Quality (Top 5 by NASA)

Plants can improve the air quality of your home. Indoor air can actually be more polluted than outdoor air. We are surrounded by tonnes of synthetic items that off-gas toxins. Household items like furniture, flooring, paint, and cleaning products silently release harmful chemicals into the air we breathe every single day.  NASA has led research into the Best Indoor Plants for Air Quality, which naturally filter toxins in the air. They won't replace a proper air purifier, but they're a beautiful, low-cost layer of protection. In this blog, we list "The Top Five" Best Indoor Plants for Air Quality.

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The Top 5 List

Plant	Toxins Filtered	Best For	Pet Safe?
1. Snake Plant	Formaldehyde, benzene, trichloroethylene, xylene, toluene	Bedrooms, low-light rooms	⚠️ Toxic
2. Spider Plant	Carbon monoxide, formaldehyde, nitrogen dioxide	Kitchens, living rooms	✅ Pet safe
3. Peace Lily	Benzene, trichloroethylene, ammonia, acetone	Offices, windowless rooms	⚠️ Toxic
4. Areca Palm	Formaldehyde, xylene, toluene + humidifies air	Living rooms, dry environments	✅ Pet safe
5. English Ivy	Benzene, trichloroethylene, carbon monoxide, mould spores	Bathrooms, allergy-prone homes	⚠️ Toxic

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Advantages

✅ Zero energy. Plants filter the air with no electricity, no filters to replace, no ongoing costs.

✅ The roots also filter. The soil microbes around plant roots break down toxins even further, boosting overall effectiveness.

✅ They add oxygen while removing CO₂. During the day, plants absorb carbon dioxide and release fresh oxygen as a natural byproduct of photosynthesis.

✅ Proven mood and focus benefits. Beyond air quality, studies consistently show that having plants in your space reduces stress.

Disadvantages

⛔ You'd need a lot. One or two plants won't change air quality in a full-sized room. You need "a jungle" to see real impact.

⛔ Overwatering causes mould. Soggy soil is a breeding ground for mould and bacteria, which can make air quality worse. Be careful!

⛔ Some are toxic to pets and children. Several of the most effective air-filtering plants are harmful if eaten.

⛔ Allergies are a real concern. Pollen and plant particles can trigger reactions in sensitive individuals, particularly in enclosed spaces.

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Best Indoor Plants for Air Quality (The Top 5)

1. Snake Plant

The Snake Plant is the most robust air-purifying plant you can own. It thrives on neglect, tolerates low light, and goes weeks without water. I love it! Its ideal for busy people like myself. This guy releases oxygen at night rather than during the day. That makes it a particularly smart choice for bedrooms, where most plants would be doing the opposite while you sleep.

The snake plant absorbs formaldehyde (which off-gasses from furniture, flooring, and insulation), benzene (from paints and detergents), trichloroethylene (from cleaning products and adhesives), and both xylene and toluene (common in varnishes and nail polish). This is the Winner of the Top 5 list when it comes to the Best Indoor Plants for Air Quality.

2. Spider Plant

The Spider Plant is a safe choice for families with kids and pets as it is completely non-toxic. It's also one of the fastest-growing houseplants around — it produces cascading "babies" (smaller plants on long stems) that you can snip off and propagate, meaning one purchase can eventually fill your whole home. Good deal!

Scientists say its particularly good at removing carbon monoxide, which is produced by gas stoves, boilers, and fireplaces. I would much prefer a low-level carbon monoxide detector to keep me safe! It also targets formaldehyde and nitrogen dioxide, the latter being a common pollutant in homes with gas appliances. Spider Plants are hard to kill, adaptable to most light conditions, and a brilliant starter plant for anyone new to houseplants.

3. Peace Lily

The Peace Lily is one of the few plants that can remove ammonia from the air, which is a chemical commonly found in cleaning sprays, fertilisers, and even some fabrics. It also tackles benzene, trichloroethylene, and acetone (from nail varnish removers and solvents). The large leaves make it look very appealing for an empty room.

Beyond its filtration credentials, the Peace Lily is a champion of low-light survival. It can thrive under purely artificial lighting, making it one of the best options for offices, hallways, or interior rooms without natural light. Its broad, dark green leaves and elegant white flowers also make it one of the most attractive plants on this list. However, be careful. It is toxic to cats and dogs if eaten.

4. Areca Palm

The Areca Palm actively humidifies the air. A mature Areca Palm releases a significant amount of moisture into the air each day through its leaves which is great news for anyone living in a dry home, particularly during winter when central heating strips humidity from the air. Good for kids who get bloody noses, also! Low indoor humidity isn't just uncomfortable; it can dry out your skin, irritate your airways, and even damage wooden furniture.

On top of its moisture benefits, the Areca Palm is an effective filter of formaldehyde, xylene, and toluene — all common chemicals found in furniture, flooring, and household products. It's also pet-safe. It does prefer bright, indirect light and a fair amount of space.

5. English Ivy

English Ivy is a particularly interesting option for anyone concerned about mould or airborne allergens. Research has shown it can reduce the concentration of airborne mould spores significantly within just a few hours in a closed room — something that no other plant on this list has been shown to do as effectively. This makes it an especially useful addition to bathrooms, basements, or any room prone to dampness.

It also filters benzene, trichloroethylene, and carbon monoxide. Its dense, trailing leaves maximise the amount of leaf surface exposed to the air, which makes it proportionally very efficient for its size. English Ivy is easy to grow in a hanging basket or on a shelf where it can trail down, and it adapts well to a variety of light conditions. 

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The Dr. Koz Important Caveats ----
What Plants Can and Can't Do?

Here's the honest truth that most plant articles skip over. The original research showing plants can clean indoor air was conducted in small, sealed laboratory chambers — not in real homes with open windows, air conditioning, and rooms full of furniture and plastic! This difference matters enormously.

To meaningfully reduce VOC levels in an average-sized living room through plants alone, some researchers estimate you'd need anywhere from 100 to 1,000 plants in a single room. That's not a typo.

To be blunt, one or two potted plants won't transform your air quality on their own.

The bigger issue is the sheer volume of synthetic materials in modern homes that continuously off-gas toxic chemicals. Flat-pack furniture, laminate flooring, synthetic carpets, mattresses, PVC flooring, and wall paint. They release chemicals slowly and consistently over months or even years. The rate at which your Snake Plant can absorb formaldehyde is simply no match for the rate at which a new MDF wardrobe is releasing it.

A good HEPA air purifier with a carbon filter will make a far bigger measurable difference to air quality. Choosing low-VOC paints and furniture, keeping rooms well-ventilated, and letting new furniture off-gas outside before bringing it in are all highly effective steps. 

Final Thoughts

Indoor plants are one of the easiest and most enjoyable ways to contribute to a healthier home environment. But they have their limits. The five species covered here — Snake Plant, Spider Plant, Peace Lily, Areca Palm, and English Ivy — are all well-supported by research and bring genuine air-cleaning benefits alongside their visual appeal. Start with one or two in the rooms where you spend the most time: the bedroom and living room are your highest-impact spots. Just go in with realistic expectations, pair them with good ventilation and perhaps an air purifier, and you'll have a home that looks better and breathes better at the same time. I hope that helps!