Which plants are most effective at removing allergens from indoor air?

Several plants are known for their allergen-removing properties, including Snake Plants, Peace Lilies, Pothos, and Dracaena varieties [3, 4]. These plants trap dust and allergens, and some, like Snake Plants, release virtually no pollen, making them ideal for allergy sufferers [3]. Regularly wiping the leaves can further enhance their air-purifying efficiency [3].

What are the best air-purifying plants for people with asthma?

Plants like Aloe Vera, Spider Plants, Snake Plants, and Peace Lilies can be beneficial for people with asthma [1, 5, 6]. Spider plants help remove humidity, while snake plants convert CO2 into oxygen at night, and Peace Lilies neutralize pollutants like benzene and formaldehyde [5, 6]. Consider plants that are insect-pollinated rather than wind-pollinated to minimize pollen exposure [11].

Which plants help remove chemical sensitivities and VOCs from the air?

Plants such as English Ivy, Spider Plants, Golden Pothos, Peace Lilies, snake plant, Dracaena, and Chinese Evergreen are effective at removing volatile organic compounds (VOCs) like formaldehyde, benzene, xylene, and trichloroethylene from indoor air [1, 7, 8]. These plants filter air through photosynthesis and transpiration, improving overall air quality [1].

Are there plants that should be avoided by people with allergies or asthma?

Yes, some plants can worsen allergies or asthma [4, 11]. Ferns, Weeping Figs, and Yucca may cause allergic reactions in some individuals [4]. Plants with fuzzy leaves, like African Violets, can also trap dust and allergens, and should be avoided [11].

How many air-purifying plants do I need to improve indoor air quality?

While the exact number varies depending on room size and plant size, having several plants can significantly improve indoor air quality [23]. NASA's research suggests that plants are efficient at absorbing contaminants [1]. A combination of plants and air purifiers is most effective for optimal air quality [1].

Plants for Allergies & Asthma

By Home Sidekick Team June 30, 2025 5 min read 989 words

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Many people seek refuge indoors to escape allergy and asthma triggers, but indoor air can be more polluted than outdoor air [1]. Volatile organic compounds (VOCs) from household products, mold, dust, and pet dander can all contribute to poor indoor air quality [1]. While no plant can completely eliminate allergens or replace medical treatment, certain plants can help improve indoor air quality and potentially ease allergy and asthma symptoms [2].

Understanding Allergies and Asthma Triggers

Allergies and asthma are often interconnected, with allergens frequently triggering asthma symptoms [3]. Common indoor allergens include:

Dust mites: Microscopic creatures that thrive in bedding, carpets, and upholstered furniture [4].
Pet dander: Tiny skin flakes shed by animals with fur or feathers [5].
Mold: Fungi that grow in damp areas, releasing spores into the air [6].
Pollen: While often associated with outdoor allergies, pollen can be tracked indoors on clothing and shoes [7].
Volatile Organic Compounds (VOCs): Chemicals emitted from household products like paints, cleaning supplies, and furniture [8].

Asthma triggers can also include irritants such as smoke, strong odors, and air pollution [9]. Understanding your specific triggers is the first step in managing allergies and asthma effectively [3].

How Plants Can Help Improve Indoor Air Quality

Plants improve air quality through several mechanisms:

Absorption of VOCs: Studies have shown that some plants can absorb harmful VOCs like formaldehyde, benzene, and xylene from the air [10, 11].
Increased Humidity: Plants release water vapor during transpiration, which can help increase humidity levels in dry indoor environments. Proper humidity can reduce dust and soothe irritated airways [12].
Carbon Dioxide Reduction: Plants absorb carbon dioxide during photosynthesis, helping to lower CO2 levels indoors [13].
Oxygen Production: As a byproduct of photosynthesis, plants release oxygen into the air [13].

However, it's important to note that the air purifying effects of plants in a typical home environment are still debated. While studies in controlled laboratory settings show promising results, real-world conditions may vary [14]. To achieve a noticeable improvement in air quality, you would likely need a significant number of plants [14].

Top Plants for Allergies and Asthma

While individual sensitivities vary, some plants are generally considered good choices for people with allergies and asthma due to their low pollen production and air-purifying properties:

Low-Allergen Plants

Snake Plant (Sansevieria trifasciata): A hardy and low-maintenance plant that filters toxins and releases oxygen at night [15].
Spider Plant (Chlorophytum comosum): Easy to grow and propagate, spider plants are effective at removing formaldehyde and xylene [16].
Peace Lily (Spathiphyllum wallisii): Known for its elegant white flowers (though some people may be sensitive to the pollen), peace lilies filter a variety of VOCs and thrive in low light [17].
ZZ Plant (Zamioculcas zamiifolia): Extremely tolerant of neglect, the ZZ plant removes toxins like xylene, toluene, and benzene [18].
Bamboo Palm (Chamaedorea seifrizii): A natural humidifier that also filters formaldehyde, xylene, and toluene [19].

Air-Purifying Plants

English Ivy (Hedera helix): Effective at absorbing mold and allergens, but keep away from pets and small children as it is toxic if ingested [20].
Aloe Vera (Aloe barbadensis miller): Besides its healing properties, aloe vera helps clear formaldehyde and benzene [21].
Boston Fern (Nephrolepis exaltata): A popular choice for removing formaldehyde and other toxins, but requires high humidity [22].
Golden Pothos (Epipremnum aureum): Easy to care for and effective at removing VOCs, but also toxic to pets [23].

Plants to Avoid if You Have Allergies or Asthma

Some plants can worsen allergy and asthma symptoms due to their high pollen count or allergenic properties. These include:

Ragweed (Ambrosia species): A major source of allergens, ragweed should be avoided both indoors and outdoors [24].
Chamomile (Matricaria chamomilla): While often used in herbal remedies, chamomile can trigger allergic reactions in some individuals [25].
Chrysanthemums (Chrysanthemum species): These flowers contain pyrethrins, which can trigger allergic reactions in sensitive individuals [26].
Sunflowers (Helianthus annuus): Produce large amounts of pollen [27].
Male Plants: Avoid male plants if possible, as they are the primary producers of pollen.

It's also important to be aware of mold growth in the soil of potted plants. Overwatering can create a damp environment that encourages mold growth, which can trigger allergy and asthma symptoms. Use well-draining soil and allow the soil to dry out slightly between waterings [28].

Tips for Choosing and Caring for Plants

Here are some practical tips for incorporating plants into your home environment while minimizing allergy and asthma triggers:

Choose low-allergen plants: Opt for plants known for their low pollen production [15, 16, 17, 18, 19].
Check for mold: Regularly inspect the soil for mold growth and take steps to prevent it [28].
Use hypoallergenic soil: Choose potting mixes that are less likely to harbor mold or allergens.
Water properly: Avoid overwatering to prevent mold growth [28].
Clean plant leaves: Dust can accumulate on plant leaves, trapping allergens. Wipe leaves regularly with a damp cloth [29].
Consider air purifiers: Use an air purifier with a HEPA filter to remove allergens and pollutants from the air [30].
Monitor your symptoms: Pay attention to how your allergies and asthma respond to different plants. If you notice an increase in symptoms, consider removing the plant [3].
Start small: Begin with a few plants and gradually increase the number as tolerated [14].

Conclusion

While plants are not a cure-all for allergies and asthma, they can be a valuable addition to a healthy home environment. By choosing the right plants, caring for them properly, and combining them with other strategies like air purification and allergen avoidance, you can create a more comfortable and breathable indoor space. As a next step, consider researching specific plants that are known to thrive in your home's environment and are safe for your family and pets. Consult with an allergist or healthcare professional for personalized advice on managing your allergies and asthma. You can also explore local nurseries or online resources for more information on low-allergen plants and best practices for indoor plant care.