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The Best Air Purifying Plants: Houseplants That Clean the Air

With over two decades of experience in medicine, Melissa Flagg writes patient education articles, keeping you informed about your health.

Most of us don't realize our indoor air quality is atrocious. It can be polluted by a number of different toxins, the most common of which are formaldehyde, benzene, and trichloroethylene.

  • Trichloroethylene, or TCE, is commonly used in paints, printer inks, lacquers, adhesives, and varnishes. Most TCE is used in the dry cleaning industry and for degreasing metal. The National Cancer Institute has declared TCE an extremely toxic liver carcinogen.
  • Benzene is a solvent that is commonly used in gasoline, inks, rubber, paints, plastics, and oils. It has also been used in the production of detergents, dyes, and explosives. However, its most troublesome use is in the production of pharmaceuticals.
  • Formaldehyde is found everywhere. Its use in urea-formaldehyde foam insulation, of UFFI, and particle and pressed wood products has been well publicized. Unfortunately, it is also used in consumer paper products such as paper towels, facial tissue, grocery bags, and waxed papers, as well as the majority of household cleaning products.

Other toxins include ammonia, xylene, and toluene.

Plants not only filter toxins, they also regulate the humidity in the home. NASA recommends that for an 1800 sq-ft house, there should be 15–18 large plants in the home. This should provide optimal coverage. So, which houseplant will help purify the air?

The Best Air Purifying Plants

  1. The Peace Lily
  2. The Spider Plant
  3. Red-Edged Dracaena
  4. The Snake Plant
  5. Flowers of the Snake Plant

1. The Peace Lily

Spathiphyllum cochlearispathum, or Peace Lily, is one of the more ornate houseplants that double as an air purifier.

It is able to filter benzene, formaldehyde, and TCE, as well as ammonia, xylene, and toluene. It has a single petal, known as a spathe, which surrounds a spadix, or fleshy stem, and the leaves are large and broad. It is an herbaceous perennial plant that requires little light (it does best in the shade) and only needs to be watered when the soil is dry.

The Peace Lily is toxic to cats and dogs if ingested. Humans are only mildly affected by its toxic effects.

2. The Spider Plant

Also called Chlorophytum comosum, the spider plant is actually an herb. It’s also a flowering perennial native to South Africa. There are three different varieties. One plant has all green leaves and there are two variegated versions:

  • Middle to dark green leaves with a white stripe down the middle
  • White margins surrounding middle to dark green leaves

The two variegated versions of the spider plant are most commonly sold as houseplants.

The spider plant is a hardy one; it can withstand temperatures as low as 35 F. It prefers temperatures between 65 F and 90 F. It’s the perfect plant for someone who has a tendency to kill plants because of neglect.

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It works well for filtering benzene, formaldehyde, toluene, and xylene. It’s mildly toxic to dogs and non-toxic to cats.

3. Red-Edged Dracaena

Dracaena marginata, also called the red-edged dracaena, is quite popular as an ornamental houseplant. As its name suggests, it has a red edge on its leaves, and it is a rather tolerant plant.

It does not need a lot of sunlight, and it will survive despite being watered sporadically. Soil should be well-drained, however, because the plants roots are susceptible to root rot. Although not as tolerant of extreme temperatures as the spider plant, it will does well in the temperature range of 64 F to 77 F.

It’s unfortunate that this beautiful plant is toxic to both cats and dogs because it filters out several toxins including formaldehyde, benzene, trichloroethylene, xylene, and toluene.

Plants and Toxicity

Plant NameToxicityFilters

Peace Lily

Toxic to both cats and dogs

Formaldehyde, ammonia, toluene, benzene, xylene

Spider Plant

Not toxic to cats, may be mildly toxic to dogs

Formaldehyde, xylene and toluene

Red-edged Dracaena

Toxic to both cats and dogs

Benzene, formaldehyde, trichloroethylene

Snake Plant

Toxic to both cats and dogs

Benzene, formaldehyde, xylene, toluene, trichloroethylene


Poisonous to cats, dogs, horses and humans

Formaldehyde, ammonia, benzene, toluene, xylene, trichloroethylene

4. The Snake Plant

Sansevieria trifasciata, also called the snake plant or mother-in-law’s tongue, is an evergreen perennial plant that is native to West Africa.

It is typically used as an ornamental plant because of its showy flowers. The snake plant does well even in areas with very little light, and it tolerates drought well. However, it is not tolerant of being over watered. Its roots are susceptible to root rot, so soil should be well drained.

Unfortunately, this plant is also toxic to both cats and dogs, but it does filter out trichloroethylene, xylene, toluene, benzene, and formaldehyde.

The flowers of the snake plant

The flowers of the snake plant

5. Flowers of the Snake Plant

Chrysanthemums, also called mums, are most commonly used as ornamental plants because of their showy, brightly colored flowers. There are actually about 30 different species of mums and 140 varieties.

Not as hardy as other air purifying plants, the chrysanthemum needs direct sunlight in order for its flowers to open. It requires well-drained soil and regular watering.

This is definitely not a plant for pet owners, despite its beauty. It is poisonous to cats, dogs, and even horses, as well as humans if ingested. However, like the Peace Lily, it filters out the most common toxins including formaldehyde, benzene, xylene, toluene, trichloroethylene, and ammonia.

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

© 2013 Mel Flagg COA OSC


Sheila Brown from Southern Oklahoma on March 29, 2015:

Apparently I am doing a good job! I have several peace plants and spider plants in my house. I have 2 snake plants, but I don't have any chrysanthemums inside the house. Ironically, I just sat down from re-potting 2 of my spider plants.

Mel Flagg COA OSC (author) from Rural Central Florida on October 21, 2013:

Dim Flaxenwick, I know what you mean! I've gotten much better at not killing my plants over the years, but I had no idea there were so many plants that actually cleaned the air! And yes, both central heating and central air can easily spread mold spores among other things. Living in Florida, we always have our A/C on, so I'm slowing getting a collection of these plants throughout the house!

Mel Flagg COA OSC (author) from Rural Central Florida on October 21, 2013:

I don't mind at all! Share away! lol :D

Dim Flaxenwick from Great Britain on October 18, 2013:

Forgot to mention. I hope you don't mind l shared this with all my facebook friends.(I also spelled your name wrong).

Think l need a lie down..

Dim Flaxenwick from Great Britain on October 18, 2013:

WOW! This is fascinating information for me. I have only one spider plant, because l feel even I can't kill a spiderplant.!!!!!

I've been concerned about the air in my home in Winter.My husband needs the house to be pretty warm and central heating has its drawbacks. I really needed to read this because as I am sure you and every man and his dog on hubpages knows that l am very unhappy about being dragged from my lovely island in the Atlantic Ocean to live out my old age in the North of England.

Now l have a mission, thank you. I think i'll start with the snake plant.

Mel Flagg COA OSC (author) from Rural Central Florida on August 09, 2013:

Thanks Phoenix. I was amazed myself. Plants are actually more effective than an air purifier (and cheaper!)

Mel Flagg COA OSC (author) from Rural Central Florida on August 09, 2013:

Thanks Pamela, I myself have a tendency to kill most plants, but after researching this article, I think I may have teach myself some gardening! I'd like to put plants all over my home, because its an older home so I'm sure the air really needs to be cleaned lol

Mel Flagg COA OSC (author) from Rural Central Florida on August 09, 2013:

Thanks nArchuleta! I have pets myself, and I live in an older home so I was really interested in which plants would clean my air but still be safe for my pets (I have 6 cats!) You're sister is quite lucky!! You might want to look into seeing if you can grow your own mother-in-law's tongue from one of her cuttings.

Mel Flagg COA OSC (author) from Rural Central Florida on August 09, 2013:

Thanks Sue! There are actually quite a few plants that can clean the air, I was amazed at how many there were.

Susan Bailey from South Yorkshire, UK on August 04, 2013:

Very interesting. I had no idea. Voted up and interesting

Nadia Archuleta from Denver, Colorado on August 01, 2013:

Great information -- I especially appreciate how you describe which plants are toxic to pets. My sister has a mother-in-law's tongue that grows rampant -- I don't even think she realizes its air purification benefits. Thanks for sharing!

Pamela Oglesby from Sunny Florida on August 01, 2013:

I had heard that plants help purify the air but I did not know the specifics. I love plants fortunately, so I have quite a few but after reading your article I think I need to get a couple more large ones. Very interesting information.

Zulma Burgos-Dudgeon from United Kingdom on August 01, 2013:

I never knew plant could purify the air. And the ones you've suggested would greatly enhance the look and feel of any room. Good hub.

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