12. English Ivy
English Ivy is not just a classic aesthetic addition to your home, it’s also a powerhouse air purifier. Research shows it can reduce airborne particles of fecal matter, which is especially valuable in homes with pets or frequent guests. Additionally, it helps filter out formaldehyde, a toxic chemical commonly released by household cleaning products and new furniture.
What it removes: Airborne fecal matter, formaldehyde
Care level: Moderate; prefers bright, indirect light and slightly moist soil
Pet warning: Highly toxic to pets and children
Best room: Bathroom, kitchen, or other spaces prone to airborne contaminants
How to Get the Most Air-Cleansing Benefits From Your Plants
Houseplants are natural air purifiers, but to unlock their full potential, a few simple care practices can make all the difference:
Group Plants Together for Greater Impact
While a single plant can improve air quality, grouping several amplifies their effect. Larger clusters increase the surface area for air filtration, helping to cleanse your indoor environment more effectively.
Keep Leaves Clean
Dust buildup blocks the pores on leaves, reducing their ability to absorb airborne toxins and release oxygen. Wipe your plants’ leaves gently with a damp cloth every couple of weeks to keep them functioning optimally.
Choose the Right Potting Soil
Mold and fungus can develop in overly damp or poor-quality soil, which may negate some of the benefits of your plants. Use well-draining, high-quality potting soil formulated for indoor plants to prevent these issues.
Don’t Overwater
Too much water can lead to root rot and mold growth, harming both your plant and your indoor air quality. Make sure to let the soil dry out between waterings and use pots with drainage holes.
Rotate Your Plants Periodically
Air circulation around plants is important. Rotate their position every few months to ensure all sides receive light and airflow, and to promote even growth. This also helps distribute the air-purifying benefits throughout your space.
FAQs About Air-Purifying Houseplants
1. Do air-purifying plants really work?
Yes. NASA’s Clean Air Study and subsequent research confirm that certain houseplants can reduce common indoor toxins like formaldehyde, benzene, and ammonia. While plants alone won’t eliminate all pollutants, they’re a natural and affordable way to improve air quality.
2. Are air-purifying plants safe for pets?
Some are, but many common air-purifying plants (like peace lilies and pothos) can be toxic to cats and dogs if ingested. Always check plant toxicity before bringing one home if you have pets, and consider pet-safe options like Areca palms or Boston ferns.
3. How many plants do I need per room?
Experts suggest aiming for at least one medium to large plant per 100 square feet. Grouping several smaller plants together can also work. The more plants you have, the better the air purification effect.
4. Do these plants improve oxygen levels indoors?
Yes, many of these plants continue to release oxygen throughout the day, and some — like snake plants and aloe vera — even release oxygen at night, helping improve sleep quality.
The Bottom Line
Improving your indoor air quality doesn’t have to be complicated or expensive. Adding a few carefully chosen houseplants can naturally cleanse the air you breathe, supporting better lung health, deeper sleep, and increased energy. Plus, they bring life, color, and calm to your living spaces.
Start with one or two of these NASA-recommended air-purifying plants today and feel the difference for yourself. Your lungs (and your home) will thank you.
