During the late 1980s, the scientific minds at NASA embarked on a groundbreaking study of common houseplants. Their mission? To discover natural, sustainable methods for purifying the air within sealed spacecraft environments, ensuring the health and well-being of astronauts on long-duration missions. What they uncovered was revolutionary: a diverse array of ordinary houseplants possessed extraordinary abilities to cleanse indoor air, making it significantly purer and healthier to breathe.
This pivotal research, famously known as the NASA Clean Air Study, revealed that these green allies are incredibly effective at filtering out certain harmful airborne compounds, transforming them into harmless plant nutrients. The good news is that these powerful air purifiers are not exotic, hard-to-find specimens. Many are easily accessible at your local nursery, florist, or home improvement store, offering an affordable and aesthetically pleasing solution to improve the air quality in your own home.
Bringing these plants into your living space can provide you and your family with air that is not only purer but also significantly freer from numerous harmful agents. These botanical wonders work tirelessly, metabolizing common indoor pollutants like formaldehyde, benzene, and trichloroethylene, all while simultaneously enriching your environment with vital oxygen. Beyond their scientific benefits, they add a touch of natural beauty and tranquility to any room.
In our modern homes, we are increasingly exposed to a cocktail of volatile organic compounds (VOCs) emitted from everyday items such as paints, furniture, cleaning products, and synthetic fabrics. These pollutants can contribute to what’s known as “sick building syndrome,” leading to symptoms like headaches, dizziness, nausea, and respiratory issues. Fortunately, nature offers an elegant and effective countermeasure. By strategically placing these NASA-approved houseplants throughout your home, you can create a healthier, more vibrant living environment.
Aloe Vera: More Than Just a Healing Succulent
While most people recognize Aloe Vera for its remarkable healing gel, a natural remedy for burns and cuts, its benefits extend far beyond first aid. This hardy succulent is also a stellar performer when it comes to enhancing indoor air quality. Aloe Vera is incredibly easy to grow and famously difficult to kill, making it an ideal choice even for those without a “green thumb.”
Its primary superpower in air purification lies in its ability to effectively remove benzene, a common chemical found in paints, certain chemical cleaners, and even some detergents, from your indoor environment. Additionally, it helps to filter out formaldehyde, another pervasive pollutant. Place an Aloe Vera plant in a sunny spot and water sparingly, allowing the soil to dry out completely between waterings, to enjoy its dual benefits of healing and air purification.
Peace Lily: Elegance Meets Powerful Air Purification
The Peace Lily (Spathiphyllum) is a truly exquisite plant, celebrated for its elegant white flowers and glossy dark green leaves. Beyond its aesthetic appeal, this plant is a formidable air purifier, capable of improving indoor air quality by an impressive margin, some studies suggesting up to 60 percent. It excels at breaking down and neutralizing several common indoor air toxins.
One of its most notable contributions is its capacity to significantly reduce the levels of mold spores in the home. The Peace Lily absorbs these spores through its leaves, subsequently circulating them to the plant’s roots where they are utilized as food. This makes it an excellent choice for bathrooms or other humid areas prone to mildew, helping to keep shower tiles and curtains free from unsightly growth. Furthermore, the Peace Lily is adept at absorbing harmful vapors from alcohol, acetone (commonly found in nail polish remover), trichloroethylene, benzene, and formaldehyde, making it a comprehensive solution for a cleaner indoor atmosphere. This plant thrives in low to moderate indirect light and prefers consistently moist soil, though it will tell you when it needs water by a dramatic droop of its leaves.
Spider Plant: The Easy-Care Toxin Fighter
The humble Spider Plant (Chlorophytum comosum) is perhaps one of the most commonly found houseplants, and for good reason: it’s incredibly easy to grow, propagate, and maintain, even for the most inexperienced plant parent. But don’t let its commonness fool you; this plant is a powerhouse when it comes to purifying your indoor air. Remarkably, within just two days, a single Spider Plant can remove up to 90 percent of certain toxins present in your indoor air.
Its prolific leaves grow quickly and are highly efficient at absorbing harmful substances such as mold spores and other allergens, making it an ideal plant for individuals who suffer from common dust allergies or respiratory sensitivities. Beyond allergens, the Spider Plant also diligently helps to absorb small traces of formaldehyde, a chemical found in numerous household products, and carbon monoxide, a dangerous gas that can sometimes be present in homes. Position your Spider Plant in bright, indirect light and water regularly, allowing the top inch of soil to dry between waterings, to maximize its air-purifying prowess. Its “spiderettes” (baby plants) are easy to propagate, allowing you to quickly fill your home with these natural air filters.
English Ivy: A Classic Purifier for Pet Owners and Offices
English Ivy (Hedera helix) is a versatile and attractive vine, well-suited for hanging baskets or trailing gracefully from shelves. It’s particularly beneficial for households with pets, as it has been shown to significantly reduce the amount of airborne fecal matter, contributing to a cleaner and fresher environment. Beyond pet-related pollutants, English Ivy is an excellent absorber of formaldehyde, a pervasive chemical commonly found in various household cleaning products, furniture glues, and certain carpeting treatments.
Moreover, studies have indicated that keeping an English Ivy plant on your desk or in your office space can contribute to improved focus and cognitive function. This is attributed to its ability to absorb trace amounts of benzene, a chemical frequently emitted by office equipment such as printers, copiers, and certain plastics. For optimal growth and air purification, English Ivy prefers bright, indirect light and consistently moist (but not waterlogged) soil. Keep in mind that English Ivy is mildly toxic if ingested, so it’s best kept out of reach of curious pets and small children.
Boston Fern: Natural Humidifier and Formaldehyde Fighter
Ferns are beloved houseplants, renowned for their lush, feathery foliage, and the Boston Fern (Nephrolepis exaltata ‘Bostoniensis’) stands out for its beauty and remarkable health benefits. These elegant plants act as natural humidifiers, releasing moisture into the air through transpiration. This makes them perfect for individuals who suffer from dry skin, irritated sinuses, or other cold-weather ailments, helping to restore comfortable humidity levels in dry indoor environments.
In addition to their humidifying properties, Boston Ferns are highly effective at eliminating traces of formaldehyde, a common indoor pollutant released from composite wood products, insulation, and textiles. Their cascading fronds look stunning when displayed in hanging baskets, adding a touch of classic botanical charm to any room. To keep your Boston Fern thriving and maximizing its air-purifying capabilities, ensure it receives bright, indirect sunlight and maintains consistently moist soil. Regular misting of the leaves is also highly beneficial to provide the high humidity levels these plants adore.
Heart Leaf Philodendron: A Charming Toxin Remover (with Caution)
The Heart Leaf Philodendron (Philodendron hederaceum) is a popular climbing vine known for its attractive heart-shaped leaves and ease of care. While undeniably charming and effective, it comes with an important caveat: this plant is toxic if ingested. Therefore, it is often best suited for homes without small pets or young children, or placed in locations where they cannot easily access it, such as high shelves or hanging baskets.
Despite its toxicity, the Heart Leaf Philodendron is an excellent choice for removing formaldehyde, a particularly prevalent chemical found in materials like particleboard, plywood, and certain glues. It is relatively easy to care for, thriving in low to medium indirect light and preferring its soil to dry out slightly between waterings. Its trailing growth habit makes it a versatile decorative element, capable of enhancing the aesthetics of a room while diligently working to purify the air. Just remember to always prioritize safety by keeping it well out of reach of curious hands and paws.
Eucalyptus: The Aromatic Airway Opener
Eucalyptus plants (Eucalyptus globulus) have been revered for centuries in traditional medicine for their diverse therapeutic properties, particularly in treating various respiratory ailments. While finding a Eucalyptus plant in typical houseplant form can be a bit challenging, if you are fortunate enough to acquire one, it makes a truly valuable addition to your home for its unique benefits.
The leaves of the Eucalyptus plant are rich in powerful compounds, including tannins and eucalyptol, which are known to raise healthy fluid levels in the body’s air passages. Simply breathing in the invigorating scent released by these plants can help to alleviate congestion problems, clear airways, and even ward off the onset of colds and other respiratory infections. It acts as a natural expectorant and decongestant. Eucalyptus plants prefer abundant direct sunlight and consistently moist soil, mimicking their native Australian habitats. While they can grow quite large outdoors, smaller varieties or diligent pruning can help maintain them as indoor specimens, providing both fresh air and therapeutic aroma.
African Violets: Relaxing Beauty with a Brightening Effect
African Violets (Saintpaulia spp.) are small, charming plants celebrated for their vibrant purple, pink, or white flowers and fuzzy leaves. Beyond their undeniable beauty, these delightful plants offer subtle yet significant health benefits. The act of gazing at their lovely purple blooms, for instance, has been observed to help stimulate adrenaline release and increase the flow of oxygen to the brain, which can contribute to feelings of relaxation and improved mental clarity.
These compact plants are relatively easy to care for, making them perfect for windowsills, desks, or shelves. While they do prefer bright, indirect sunlight, a key advantage of African Violets is their ability to thrive exceptionally well under artificial light. This makes them an ideal choice for rooms that do not have access to abundant natural direct sunlight, ensuring anyone can enjoy their beauty and subtle atmospheric benefits. For best results, water them from the bottom to keep water off their leaves and ensure they are placed in a consistently warm environment.
Chinese Evergreen: The Enduring Air Purifier
The Chinese Evergreen (Aglaonema) is a remarkably resilient and easy-to-care-for houseplant, renowned for its attractive variegated foliage. This plant is a true workhorse when it comes to ridding your home of a variety of air pollutants. Its striking leaves often feature patterns of silver, green, and red, and some varieties even produce tiny, lovely red berries, adding an extra decorative touch to its practical benefits.
The Chinese Evergreen is particularly effective at removing toxins commonly found in chemical-based household cleaners, such as formaldehyde and benzene. One of its most impressive traits is that its air-purifying capability actually increases over time. The longer you have the plant, and the more it matures, the more toxins it will actively remove from your environment. Therefore, consider the Chinese Evergreen a long-term investment in your home’s air quality, planning to keep it for many years for optimal benefits. It thrives in low to medium light conditions and can tolerate some neglect, making it perfect for busy individuals or those new to plant care. Keep its soil consistently moist but avoid overwatering.
Chrysanthemum: Vibrant Blooms and Powerful Filtration
Chrysanthemums, affectionately known as “Mums,” are beautiful, vibrant flowers readily available at most nurseries and floral shops, especially during the autumn months. Their rich array of colors alone makes them a wonderful choice for a houseplant, instantly brightening any room. However, their contribution extends far beyond mere aesthetics; they offer significant benefits to your indoor air quality as well, making them a dual-purpose delight.
Chrysanthemums are particularly skilled at filtering out benzene, a prevalent chemical found in many household detergents, paints, plastics, and various glue products. By introducing these cheerful blooms into your home, you can actively reduce your exposure to this common volatile organic compound. They prefer direct sunlight, which encourages abundant flowering, and their compact growth habit makes them excellent choices for display near windows or as hanging plants. While often treated as annuals, with proper care and deadheading, you can prolong their blooming period and continue to enjoy both their beauty and their powerful air-purifying effects.
Embracing these NASA-approved houseplants is a simple, effective, and beautiful way to transform your indoor environment into a healthier sanctuary. By understanding their unique benefits and providing appropriate care, you can harness nature’s own filtration system to breathe easier and live better within your home.