Do Houseplants Really Purify Indoor Air, or Is Ventilation More Important?

Snake plants, spider plants, peace lilies and aloe vera are often marketed as natural air purifiers. While some studies show that plants can absorb certain pollutants in controlled settings, a few pots in a room are unlikely to make a major difference to everyday indoor air quality. A 2019 scientific review found that the pollutant-removal rate of ordinary potted plants was too low to compete with normal ventilation. Plants can make a home more attractive and may support well-being, but they should not be treated as a replacement for fresh air or a suitable air purifier. For cleaner indoor air, focus on safe ventilation, reducing smoke and chemical pollutants, controlling dampness and mould, and using an appropriately sized air purifier where necessary. Do you keep houseplants mainly for their beauty, their perceived health benefits, or both?

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