It’s no secret that houseplants bring a cozy, vibrant feel to our homes, but did you know they’re also working behind the scenes to make your indoor air cleaner and healthier?
That’s not just plant-lover hype. In 1989, NASA, in partnership with the Associated Landscape Contractors of America (ALCA), launched a study to find natural ways to clean the air inside space stations. The result? A game-changing discovery that confirmed what many of us suspected: Houseplants do more than decorate—they detoxify.
And guess what? The benefits of those findings apply beautifully to our well-sealed, energy-efficient homes, especially in the winter months when windows are shut tight and we’re breathing the same recirculated air while sipping hot cocoa by the fire.
What Are VOCs, and Why Should You Care?
NASA focused on removing Volatile Organic Compounds (VOCs)—the invisible pollutants found in everyday household items. VOCs are released by things such as:
- Paints and varnishes
- Cleaning products
- Plastics
- Carpet
- Paper products
- Gasoline fumes
- Synthetic fabrics
When trapped inside with little ventilation (hello, winter), these toxins can build up and cause everything from headaches and fatigue to long-term health concerns. That’s where houseplants come in.
Houseplants: The Natural Air Purifiers
According to NASA, certain houseplants can absorb toxins through their leaves and roots, filtering and purifying the air we breathe. They also release oxygen and boost humidity, making our indoor environment more comfortable, especially during dry, heated winter months.
And here’s a great rule of thumb: Three houseplants per average-size room can make a noticeable difference.
But hey, even one plant is a step in the right direction.
Five Easy Houseplants That Clean Your Air
These five power plants are all beginner-friendly and available in most garden centers—and yes, they’re beautiful too.
1. Peace Lily (Spathiphyllum)
Air-purifying power: Removes all five major indoor toxins, including benzene, formaldehyde, trichloroethylene, xylene, and ammonia.
Light needs: Low, natural light (perfect for north or northeast windows).
Care tips: Water when the soil is dry to the touch. Peace lilies are drama queens—they droop to let you know they’re thirsty, but try not to wait for the show!
Bonus: Elegant white blooms and rich green leaves brighten any space.
One of the most effective all-around air-cleaning plants out there.
2. Mother-in-Law’s Tongue (Snake Plant) (Sansevieria trifasciata)
Air-purifying power: Removes four major toxins (minus ammonia).
Light needs: Low to bright indirect light—very adaptable.
Care tips: Water sparingly. Snake plants thrive on neglect and don’t need frequent attention.
Bonus: Unlike most plants, they release oxygen at night—perfect for bedrooms.
Tall, striking, and nearly indestructible.
3. English Ivy (Hedera helix)
Air-purifying power: Especially good at removing formaldehyde, which is common in paper goods and synthetic fabrics.
Light needs: Medium natural light—ideal near an east- or southeast-facing window.
Care tips: Let the soil dry slightly between waterings. Great in hanging baskets or trained into a topiary form.
Bonus: Versatile and elegant as a trailing plant or accent.
Beautiful indoors (but remember—only indoors! Outdoors it’s invasive.)
4. Red-Edged Dracaena (Dracaena marginata)
Air-purifying power: Tackles toxins like those from gasoline, varnishes, and sealants.
Light needs: Tolerates sun or shade, but prefers filtered light and some protection from harsh afternoon rays.
Care tips: Water moderately, allowing the soil to dry between waterings.
Bonus: Can grow tall (up to 8 to 15′) and adds bold structure to a room.
A great choice for modern spaces that need a vertical statement plant.
5. Aloe Vera
Air-purifying power: Filters out common chemicals from household cleaners and paints.
Light needs: Bright, direct light—perfect for a sunny windowsill.
Care tips: Water sparingly; let the soil dry out completely between drinks.
Bonus: The gel inside the leaves is great for treating minor burns or skin irritations.
Both a healing plant and a hardworking air purifier—win-win!
